The Stingray Modeling API Explained

Some more in-depth explanations of how the Stingray modeling API works.

Who should be using this API? Basically, anyone who wants to model power spectral products with parametric functions. The purpose of this API is two-fold: (1) provide convenient methods and classes in order to model a large range of typical data representations implemented in Stingray (2) provide a more general framework for users to build their own models

A note on terminology: in this tutorial, we largely use model to denote both the parametric model describing the underlying process that generated the data, and the statistical model used to account for uncertainties in the measurement process.

The modeling subpackage defines a wider range of classes for typical statistical models than most standard modelling packages in X-ray astronomy, including likelihoods for Gaussian-distributed uncertainties (what astronomers call the \(\chi^2\) likelihood), Poisson-distributed data (e.g. light curves) and \(\chi^2\)-distributed data (confusingly, not what astronomers call the \(\chi^2\) likelihood, but the likelihood of data with \(\chi^2\)-distributed uncertainties appropriate for power spectra). It also defines a superclass LogLikelihood that make extending the framework to other types of data uncertainties straightforward. It supports Bayesian modelling via the Posterior class and its subclasses (for different types of data, equivalent to the likelihood classes) and provides support for defining priors.

The class ParameterEstimation and its data type-specific subclasses implement a range of operations usually done with power spectra and other products, including optimization (fitting), sampling (via Markov-Chain Monte Carlo), calibrating models comparison metrics (particularly likelihood ratio tests) and outlier statistics (for finding periodic signal candidates).

Overall, it is designed to be as modular as possible and extensible to new data types and problems in many places, though we do explicitly not aim to provide a fully general modelling framework (for example, at the moment, we have given no thought to modeling multi-variate data, though this may change in the future).

Some background

Modeling power spectra and light curves with parametric models is a fairly standard task. Stingray aims to make solving these problems as easy as possible.

We aim to integrate our existing code with astropy.modeling for for maximum compatibility. Please note, however, that we are only using the models, not the fitting interface, which is too constrained for our purposes.

In [1]:
%matplotlib inline
import matplotlib.pyplot as plt

try:
    import seaborn as sns
    sns.set_palette("colorblind")
except ImportError:
    print("Install seaborn. It help you make prettier figures!")

import numpy as np

from astropy.modeling import models

The models and API of astropy.modeling.models is explained in the astropy documentation in more detail.

Here’s how you instantiate a simple 1-D Gaussian:

In [2]:
g = models.Gaussian1D()
In [3]:
# Generate fake data
np.random.seed(0)
x = np.linspace(-5., 5., 200)
y = 3 * np.exp(-0.5 * (x - 1.3)**2 / 0.8**2)
y += np.random.normal(0., 0.2, x.shape)
yerr = 0.2

plt.figure(figsize=(8,5))
plt.errorbar(x, y, yerr=yerr, fmt='ko')

Out[3]:
<Container object of 3 artists>
../../_images/notebooks_Modeling_ModelingExamples_4_1.png

Likelihoods and Posteriors

In general, model fitting will happen either in a frequentist (Maximum Likelihood) or Bayesian framework. Stingray’s strategy is to let the user define a posterior in both cases, but ignore the prior in the former case.

Let’s first make some fake data:

In [4]:
# define power law component
pl = models.PowerLaw1D()

# fix x_0 of power law component
pl.x_0.fixed = True

# define constant
c = models.Const1D()

# make compound model
plc = pl + c

We’re going to pick some fairly standard parameters for our data:

In [5]:
# parameters for fake data.
alpha = 2.0
amplitude = 5.0
white_noise = 2.0

And now a frequency array:

In [6]:
freq = np.linspace(0.01, 10.0, 10.0/0.01)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/ipykernel_launcher.py:1: DeprecationWarning: object of type <class 'float'> cannot be safely interpreted as an integer.
  """Entry point for launching an IPython kernel.

Now we can set the parameters in the model:

In [7]:
from astropy.modeling.fitting import _fitter_to_model_params

_fitter_to_model_params(plc, [amplitude, alpha, white_noise])

In [8]:
psd_shape = plc(freq)

As a last step, we need to add noise by picking from a chi-square distribution with 2 degrees of freedom:

In [9]:
powers = psd_shape*np.random.chisquare(2, size=psd_shape.shape[0])/2.0

Let’s plot the result:

In [10]:
plt.figure(figsize=(12,7))
plt.loglog(freq, psd_shape, label="power spectrum")
plt.loglog(freq, powers, linestyle="steps-mid", label="periodogram realization")
plt.legend()
Out[10]:
<matplotlib.legend.Legend at 0x113489f98>
../../_images/notebooks_Modeling_ModelingExamples_17_1.png

Maximum Likelihood Fitting

Let’s assume we’ve observed this periodogram from our source. We would now like to estimate the parameters. This requires the definition of likelihood, which describes the probability of observing the data plotted above given some underlying model with a specific set of parameters. To say it differently, the likelihood encodes what we know about the underlying model (here a power law and a constant) and the statistical properties of the data (power spectra generally follow a chi-square distribution) and then allows us to compare data and model for various parameters under the assumption of the statistical uncertainties.

In order to find the best parameter set, one generally maximizes the likelihood function using an optimization algorithm. Because optimization algorithms generally minimize functions, they effectively minimize the log-likelihood, which comes out to be the same as maximizing the likelihood itself.

Below is an implementation of the \(\chi^2\) likelihood as appropriate for power spectral analysis, with comments for easier understanding. The same is also implemented in posterior.py in Stingray:

In [11]:
logmin = -1e16
class PSDLogLikelihood(object):

    def __init__(self, freq, power, model, m=1):
        """
        A Chi-square likelihood as appropriate for power spectral analysis.

        Parameters
        ----------
        freq : iterable
            x-coordinate of the data

        power : iterable
            y-coordinte of the data

        model: an Astropy Model instance
            The model to use in the likelihood.

        m : int
            1/2 of the degrees of freedom, i.e. the number of powers
            that were averaged to obtain the power spectrum input into
            this routine.

        """

        self.x = ps.freq # the x-coordinate of the data (frequency array)
        self.y = ps.power # the y-coordinate of the data (powers)
        self.model = model # an astropy.models instance
        self.m = m

        self.params = [k for k,l in self.model.fixed.items() if not l]
        self.npar = len(self.params) # number of free parameters

    def evaluate(self, pars, neg=False):
        """
        Evaluate the log-likelihood.

        Parameters
        ----------
        pars : iterable
            The list of parameters for which to evaluate the model.

        neg : bool, default False
            If True, compute the *negative* log-likelihood, otherwise
            compute the *positive* log-likelihood.

        Returns
        -------
        loglike : float
            The log-likelihood of the model

        """
        # raise an error if the length of the parameter array input into
        # this method doesn't match the number of free parameters in the model
        if np.size(pars) != self.npar:
            raise Exception("Input parameters must" +
                            " match model parameters!")

        # set parameters in self.model to the parameter set to be used for
        # evaluation
        _fitter_to_model_params(self.model, pars)

        # compute the values of the model at the positions self.x
        mean_model = self.model(self.x)

        # if the power spectrum isn't averaged, compute simple exponential
        # likelihood (chi-square likelihood for 2 degrees of freedom)
        if self.m == 1:
            loglike = -np.sum(np.log(mean_model)) - \
                      np.sum(self.y/mean_model)
        # otherwise use chi-square distribution to compute likelihood
        else:
            loglike = -2.0*self.m*(np.sum(np.log(mean_model)) +
                               np.sum(self.y/mean_model) +
                               np.sum((2.0 / (2. * self.m) - 1.0) *
                                      np.log(self.y)))

        if not np.isfinite(loglike):
            loglike = logmin

        if neg:
            return -loglike
        else:
            return loglike

    def __call__(self, parameters, neg=False):
        return self.evaluate(parameters, neg)

Let’s make an object and see what it calculates if we put in different parameter sets. First, we have to make our sample PSD into an actual Powerspectrum object:

In [12]:
from stingray import Powerspectrum

ps = Powerspectrum()
ps.freq = freq
ps.power = powers
ps.df = ps.freq[1] - ps.freq[0]
ps.m = 1
/Users/danielahuppenkothen/work/repositories/stingraysoftware/stingray/stingray/utils.py:18: UserWarning: Numba not installed. Faking it
  warnings.warn("Numba not installed. Faking it")
In [13]:
loglike = PSDLogLikelihood(ps.freq, ps.power, plc, m=ps.m)
In [14]:
test_pars = [1, 5, 100]
loglike(test_pars)
Out[14]:
-4835.8821484746204
In [15]:
test_pars = [4.0, 10, 2.5]
loglike(test_pars)
Out[15]:
-2869.5582486265116
In [16]:
test_pars = [2.0, 5.0, 2.0]
loglike(test_pars)
Out[16]:
-2375.704120812954

Something close to the parameters we put in should yield the largest log-likelihood. Feel free to play around with the test parameters to verify that this is true.

You can similarly import the PSDLogLikelihood class from stingray.modeling and do the same:

In [17]:
from stingray.modeling import PSDLogLikelihood

loglike = PSDLogLikelihood(ps.freq, ps.power, plc, m=ps.m)
loglike(test_pars)
Out[17]:
-2375.704120812954

To estimate the parameters, we can use an optimization routine, such as those implemented in scipy.optimize.minimize. We have wrapped some code around that, to make your lives easier. We will not reproduce the full code here, just demonstrate its functionality.

Now we can instantiate the PSDParEst (for PSD Parameter Estimation) object. This can do more than simply optimize a single model, but we’ll get to that later.

The PSDParEst object allows one to specify the fit method to use (however, this must be one of the optimizers in scipy.optimize). The parameter max_post allows for doing maximum-a-posteriori fits on the Bayesian posterior rather than maximum likelihood fits (see below for more details). We’ll set it to False for now, since we haven’t defined any priors:

In [18]:
from stingray.modeling import PSDParEst

parest = PSDParEst(ps, fitmethod="L-BFGS-B", max_post=False)

In order to fit a model, make an instance of the appropriate LogLikelihood or Posterior subclass, andsimply call the fit method with that instance and starting parameters you would like to fit.

In [19]:
loglike = PSDLogLikelihood(ps.freq, ps.power, plc, m=ps.m)
In [20]:
loglike.model.parameters
Out[20]:
array([ 2.,  1.,  5.,  2.])
In [21]:
loglike.npar
Out[21]:
3
In [22]:
starting_pars = [3.0, 1.0, 2.4]
res = parest.fit(loglike, starting_pars)

The result is an OptimizationResults object, which computes various summaries and useful quantities.

For example, here’s the value of the likelihood function at the maximum the optimizer found:

In [23]:
res.result
Out[23]:
2183.7896770356874

Note: Optimizers routinely get stuck in local minima (corresponding to local maxima of the likelihood function). It is usually useful to run an optimizer several times with different starting parameters in order to get close to the global maximum.

Most useful are the estimates of the parameters at the maximum likelihood and their uncertainties:

In [24]:
print(res.p_opt)
print(res.err)
[ 4.7291557   2.09193171  2.1037234 ]
[ 3.81622532  0.73245503  0.55582912]

Note: uncertainties are estimated here via the covariance matrix between parameters, i.e. the inverse of the Hessian at the maximum. This only represents the true uncertainties for specific assumptions about the likelihood function (Gaussianity), so use with care!

It also computes Akaike Information Criterion (AIC) and the Bayesian Information Criterion (BIC) for model comparison purposes:

In [25]:
print("AIC: " + str(res.aic))
print("BIC: " + str(res.bic))
AIC: 2189.78967704
BIC: 2204.51294287

Finally, it also produces the values of the mean function for the parameters at the maximum. Let’s plot that and compare with the power spectrum we put in:

In [26]:
plt.figure(figsize=(12,8))
plt.loglog(ps.freq, psd_shape, label="true power spectrum",lw=3)
plt.loglog(ps.freq, ps.power, label="simulated data")
plt.loglog(ps.freq, res.mfit, label="best fit", lw=3)
plt.legend()
Out[26]:
<matplotlib.legend.Legend at 0x11365d9b0>
../../_images/notebooks_Modeling_ModelingExamples_42_1.png

That looks pretty good!

You can print a summary of the fitting results by calling print_summary:

In [27]:
res.print_summary(loglike)
The best-fit model parameters plus errors are:
  0) Parameter amplitude_0         :
4.72916              +/- 3.81623
[      None       None]
  1) Parameter x_0_0               :
1.00000              (Fixed)
  2) Parameter alpha_0             :
2.09193              +/- 0.73246
[      None       None]
  3) Parameter amplitude_1         :
2.10372              +/- 0.55583
[      None       None]


Fitting statistics:
 -- number of data points: 1000
 -- Deviance [-2 log L] D = 4367.579354.3
 -- The Akaike Information Criterion of the model is: 2189.78967704.
 -- The Bayesian Information Criterion of the model is: 2204.51294287.
 -- The figure-of-merit function for this model  is: 1079.683127.5f and the fit for 997 dof is 1.082932.3f
 -- Summed Residuals S = 69266.830930.5f
 -- Expected S ~ 6000.000000.5 +/- 109.544512.5
 -- merit function (SSE) M = 1079.683127.5f


Likelihood Ratios

The parameter estimation code has more functionality than act as a simple wrapper around scipy.optimize. For example, it allows for easy computation of likelihood ratios. Likelihood ratios are a standard way to perform comparisons between two models (though they are not always statistically meaningful, and should be used with caution!).

To demonstrate that, let’s make a broken power law model

In [28]:
# broken power law model
bpl = models.BrokenPowerLaw1D()

# add constant
bplc = bpl + c
In [29]:
bplc.param_names
Out[29]:
('amplitude_0', 'x_break_0', 'alpha_1_0', 'alpha_2_0', 'amplitude_1')
In [30]:
# define starting parameters
bplc_start_pars = [2.0, 1.0, 3.0, 1.0, 2.5]
In [31]:
loglike_bplc = PSDLogLikelihood(ps.freq, ps.power, bplc, m=ps.m)
In [32]:
pval, plc_opt, bplc_opt = parest.compute_lrt(loglike, starting_pars, loglike_bplc, bplc_start_pars)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:114: RuntimeWarning: invalid value encountered in power
  return amplitude * xx ** (-alpha)
In [33]:
print("Likelihood Ratio: " + str(pval))
Likelihood Ratio: 0.360452507762

Bayesian Parameter Estimation

For Bayesian parameter estimation, we require a prior along with the likelihood defined above. Together, they form the posterior, the probability of the parameters given the data, which is what we generally want to compute in science.

Since there are no universally accepted priors for a model (they depend on the problem at hand and your physical knowledge about the system), they cannot be easily hard-coded in stingray. Consequently, setting priors is slightly more complex.

Analogously to the LogLikelihood above, we can also define a Posterior object. Each posterior object has three methods: logprior, loglikelihood and logposterior.

We have pre-defined some Posterior objects in posterior.py for common problems, including power spectral analysis. We start by making a PSDPosterior object:

In [34]:
from stingray.modeling import PSDPosterior
In [35]:
lpost = PSDPosterior(ps.freq, ps.power, plc, m=ps.m)

The priors are set as a dictionary of functions:

In [36]:
import scipy.stats

# flat prior for the power law index
p_alpha = lambda alpha: ((-1. <= alpha) & (alpha <= 5.))

# flat prior for the power law amplitude
p_amplitude = lambda amplitude: ((0.01 <= amplitude) & (amplitude <= 10.0))

# normal prior for the white noise parameter
p_whitenoise = lambda white_noise: scipy.stats.norm(2.0, 0.1).pdf(white_noise)

priors = {}
priors["alpha_0"] = p_alpha
priors["amplitude_0"] = p_amplitude
priors["amplitude_1"] = p_whitenoise

There’s a function set_logprior in stingray.modeling that sets the prior correctly:

In [37]:
from stingray.modeling import set_logprior
In [38]:
lpost.logprior = set_logprior(lpost, priors)

You can also set the priors when you instantiate the posterior object:

In [39]:
lpost = PSDPosterior(ps.freq, ps.power, plc, priors=priors, m=ps.m)

Much like before with the log-likelihood, we can now also compute the log-posterior for various test parameter sets:

In [40]:
test_pars = [1.0, 2.0, 4.0]
print("log-prior: " + str(lpost.logprior(test_pars)))
print("log-likelihood: " + str(lpost.loglikelihood(test_pars)))
print("log-posterior: " + str(lpost(test_pars)))
log-prior: -198.61635344
log-likelihood: -2412.24935946
log-posterior: -2610.8657129

When the prior is zero (so the log-prior is -infinity), it automatically gets set to a very small value in order to avoid problems when doing the optimization:

In [41]:
test_pars = [6, 6, 3.0]
print("log-prior: " + str(lpost.logprior(test_pars)))
print("log-likelihood: " + str(lpost.loglikelihood(test_pars)))
print("log-posterior: " + str(lpost(test_pars)))
log-prior: -1e+16
log-likelihood: -2534.05678262
log-posterior: -1e+16
In [42]:
test_pars = [5.0, 2.0, 2.0]
print("log-prior: " + str(lpost.logprior(test_pars)))
print("log-likelihood: " + str(lpost.loglikelihood(test_pars)))
print("log-posterior: " + str(lpost(test_pars)))
log-prior: 1.38364655979
log-likelihood: -2184.67395364
log-posterior: -2183.29030708

We can do the same parameter estimation as above, except now it’s called maximum-a-posteriori instead of maximum likelihood and includes the prior (notice we set max_post=True):

In [43]:
parest = PSDParEst(ps, fitmethod='BFGS', max_post=True)
res = parest.fit(lpost, starting_pars)
In [44]:
print("best-fit parameters:")
for p,e in zip(res.p_opt, res.err):
    print("%.4f +/- %.4f"%(p,e))
best-fit parameters:
4.8949 +/- 0.0762
2.0690 +/- 0.0636
2.0547 +/- 0.0149

The same outputs exist as for the Maximum Likelihood case:

In [45]:
res.print_summary(lpost)
The best-fit model parameters plus errors are:
The best-fit model parameters plus errors are:
  0) Parameter amplitude_0         :
  0) Parameter amplitude_0         :
4.89491              +/- 0.07623
4.89491              +/- 0.07623
[      None       None]
[      None       None]
  1) Parameter x_0_0               :
  1) Parameter x_0_0               :
1.00000              (Fixed)
1.00000              (Fixed)
  2) Parameter alpha_0             :
  2) Parameter alpha_0             :
2.06898              +/- 0.06363
2.06898              +/- 0.06363
[      None       None]
[      None       None]
  3) Parameter amplitude_1         :
  3) Parameter amplitude_1         :
2.05471              +/- 0.01489
2.05471              +/- 0.01489
[      None       None]
[      None       None]




Fitting statistics:
Fitting statistics:
 -- number of data points: 1000
 -- number of data points: 1000
 -- Deviance [-2 log L] D = 4367.845867.3
 -- Deviance [-2 log L] D = 4367.845867.3
 -- The Akaike Information Criterion of the model is: 2188.688941098666.
 -- The Akaike Information Criterion of the model is: 2188.688941098666.
 -- The Bayesian Information Criterion of the model is: 2203.41220694.
 -- The Bayesian Information Criterion of the model is: 2203.41220694.
 -- The figure-of-merit function for this model  is: 1104.686605.5f and the fit for 997 dof is 1.108011.3f
 -- The figure-of-merit function for this model  is: 1104.686605.5f and the fit for 997 dof is 1.108011.3f
 -- Summed Residuals S = 75870.935552.5f
 -- Summed Residuals S = 75870.935552.5f
 -- Expected S ~ 6000.000000.5 +/- 109.544512.5
 -- Expected S ~ 6000.000000.5 +/- 109.544512.5
 -- merit function (SSE) M = 1104.686605.5f


 -- merit function (SSE) M = 1104.686605.5f


Unlike in the maximum likelihood case, we can also sample from the posterior probability distribution. The method sample uses the emcee package to do MCMC.

Note: Do not sample from the likelihood function. This is formally incorrect and can lead to incorrect inferences about the problem, because there is no guarantee that a posterior with improper (flat, infinite) priors will be bounded!

Much like the optimizer, the sampling method requires a model and a set of starting parameters t0. Optionally, it can be useful to also input a covariance matrix, for example from the output of the optimizer.

Finally, the user should specify the number of walkers as well as the number of steps to use for both burn-in and sampling:

In [46]:
sample = parest.sample(lpost, res.p_opt, cov=res.cov, nwalkers=400,
             niter=100, burnin=300, namestr="psd_modeling_test")
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in multiply
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: underflow encountered in power
  return amplitude * xx ** (-alpha)
/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/astropy/modeling/powerlaws.py:54: RuntimeWarning: overflow encountered in power