ExponentialCutoffPowerLaw1D¶

class astropy.modeling.powerlaws.ExponentialCutoffPowerLaw1D[source] [edit on github]¶

One dimensional power law model with an exponential cutoff.

Parameters:

amplitude : float

Model amplitude

x_0 : float

Reference point

alpha : float

Power law index

x_cutoff : float

Cutoff point

Notes

Model formula (with $A$ for amplitude and $\alpha$ for alpha):

$f(x) = A (x / x_0) ^ {-\alpha} \exp (-x / x_{cutoff})$

Attributes Summary

Methods Summary

`evaluate`(x, amplitude, x_0, alpha, x_cutoff)	One dimensional exponential cutoff power law model function
`fit_deriv`(x, amplitude, x_0, alpha, x_cutoff)	One dimensional exponential cutoff power law derivative with respect to parameters

Attributes Documentation

Methods Documentation

static evaluate(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]¶: One dimensional exponential cutoff power law model function

static fit_deriv(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]¶: One dimensional exponential cutoff power law derivative with respect to parameters