XSzbabs

class sherpa.astro.xspec.XSzbabs(name='zbabs')

Bases: sherpa.astro.xspec.XSMultiplicativeModel

The XSPEC lyman model: Voigt absorption profiles for H I or He II Lyman series.

The model is described at [1].

Note

Deprecated in Sherpa 4.10.0

The redshift parameter has been renamed z to match the XSPEC definition. The name redshift can still be used to access the parameter, but this name will be removed in a future release.

nH

The H column density, in 10^22 atoms/cm^2.

nHeI

The He I column density, in 10^22 atoms/cm^2.

nHeI

The He II column density, in 10^22 atoms/cm^2.

z

The redshift of the absorber.

References

[1]	https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelZbabs.html

Attributes Summary

thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars
version_enabled

Methods Summary

apply(outer, \*otherargs, \*\*otherkwargs)
calc(pars, xlo, \*args, \*\*kwargs)
get_center()
guess(dep, \*args, \*\*kwargs)	Set an initial guess for the parameter values.
reset()
set_center(\*args, \*\*kwargs)
startup()
teardown()

Attributes Documentation

thawedparhardmaxes

thawedparhardmins

thawedparmaxes

thawedparmins

thawedpars

version_enabled = True

Methods Documentation

apply(outer, *otherargs, **otherkwargs)

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

get_center()

guess(dep, *args, **kwargs)

Set an initial guess for the parameter values.

Attempt to set the parameter values, and ranges, for the model to match the data values. This is intended as a rough guess, so it is expected that the model is only evaluated a small number of times, if at all.

reset()

set_center(*args, **kwargs)

startup()

teardown()