Last modified: December 2018

URL: http://cxc.harvard.edu/sherpa/ahelp/xstbabs.html
AHELP for CIAO 4.11 Sherpa v1

xstbabs

Context: models

Synopsis

The XSPEC TBabs model: ISM grain absorption.

Syntax

xstbabs

The xstbabs model is a multiplivative model component.

Description

The model is described at [1] .


Example

>>> create_model_component("xstbabs", "mdl")
>>> print(mdl)

Create a component of the xstbabs model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.nH       thawed            1            0       100000 10^22 atoms / cm^2

ATTRIBUTES

The attribute for this object is:

nH

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

Notes

The `set_xsabund` function changes the relative abundances of the elements, in particular the "wilm" setting.

References

XSPEC version

CIAO 4.11 comes with support for version 12.10.0e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.0e

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

See Also

models
xstbfeo, xstbgas, xstbgrain, xstbpcf, xstbrel, xstbvarabs, xsztbabs