XSismabs

class sherpa.astro.xspec.XSismabs(name='ismabs')

Bases: sherpa.astro.xspec.XSMultiplicativeModel

The XSPEC ismabs model: A high resolution ISM absorption model with variable columns for individual ions.

The model is described at [1].

H

The equivalent hydrogen column (in units of 10^22 atoms/cm^2).

HeII, CI, CII, CIII, NI, NII, NIII, OI, OII, OIII, NeI, NeII, NeIII,

MgI, MgII, MgIII, Si_I, Si_II, Si_III, S_I, S_II, S_III,

ArI, ArII, ArIII, CaI, CaII, CaIII, Fe

The column for the species (in units of 10^16 atoms/cm^2).

redshift

The redshift of the absorber.

Notes

As Sherpa parameter names are case insensitive the parameters for Silicon and Sulfur include an underscore character after the element name to avoid conflict: that is Si_I and S_I refer to the XSPEC SiI and SI parameters respectively.

References

[1]	https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelIsmabs.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()