BPL1D

class sherpa.astro.models.BPL1D(name='bpl1d')

Bases: sherpa.models.model.ArithmeticModel

One-dimensional broken power-law function.

gamma1

The slope of the power law below the break point.

gamma2

The slope of the power law above the break point.

eb

The position of the break point.

ref

The reference position for the amplitude.

ampl

The amplitude, defined with respect to the reference position.

See also

Beta1D, Lorentz1D, NormBeta1D

Notes

The functional form of the model for points is:

 f(x) = ampl * (x / ref)^(-gamma1)   x <= eb

      = ampl' * (x / ref)^(-gamma2)  otherwise

ampl' = ampl (eb / ref)^(gamma2 - gamma1)

and for an integrated grid it is the integral of this over the bin.

Attributes Summary

thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars

Methods Summary

apply(outer, \*otherargs, \*\*otherkwargs)
calc(pars, xlo, \*args, \*\*kwargs)
get_center()
guess(dep, \*args, \*\*kwargs)
reset()
set_center(\*args, \*\*kwargs)
startup()
teardown()

Attributes Documentation

thawedparhardmaxes

thawedparhardmins

thawedparmaxes

thawedparmins

thawedpars

Methods Documentation

apply(outer, *otherargs, **otherkwargs)

calc(pars, xlo, *args, **kwargs)

get_center()

guess(dep, *args, **kwargs)

reset()

set_center(*args, **kwargs)

startup()

teardown()