Synopsis
The XSPEC TBabs model: ISM grain absorption.
Syntax
xstbabs The xstbabs model is a multiplicative 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 1e+06 10^22 atoms / cm^2
ATTRIBUTES
The attribute for this object is:
| Attribute | Definition |
|---|---|
| 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
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelTbabs.html
XSPEC version
CIAO 4.17 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.14.0k
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.