astropy:docs

ExponentialCutoffPowerLaw1D

class astropy.modeling.powerlaws.ExponentialCutoffPowerLaw1D(amplitude, x_0, alpha, x_cutoff, **constraints)[source] [edit on github]

Bases: astropy.modeling.core.Parametric1DModel

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

alpha
amplitude
param_names list() -> new empty list
x_0
x_cutoff

Methods Summary

deriv(x, amplitude, x_0, alpha, x_cutoff) One dimensional exponential cutoff power law derivative
eval(x, amplitude, x_0, alpha, x_cutoff) One dimensional exponential cutoff power law model function

Attributes Documentation

alpha
amplitude
param_names = ['amplitude', 'x_0', 'alpha', 'x_cutoff']
x_0
x_cutoff

Methods Documentation

static deriv(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]

One dimensional exponential cutoff power law derivative

static eval(x, amplitude, x_0, alpha, x_cutoff)[source] [edit on github]

One dimensional exponential cutoff power law model function