Last modified: December 2018

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

xsztbabs

Context: models

Synopsis

The XSPEC zTBabs model: ISM grain absorption.

Syntax

xsztbabs

The xsztbabs model is a multiplivative model component.

Description

The model is described at [1] .


Example

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

Create a component of the xsztbabs 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
   mdl.redshift frozen            0       -0.999           10           

ATTRIBUTES

The attributes for this object are:

nH

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

redshift

The redshift of the absorber.

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
xstbabs, xstbfeo, xstbgas, xstbgrain, xstbpcf, xstbrel, xstbvarabs