Last modified: December 2023

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xscompst.html
AHELP for CIAO 4.16 Sherpa

xscompst

Context: models

Synopsis

The XSPEC compST model: Comptonization, Sunyaev & Titarchuk.

Syntax

xscompst

The xscompst model is an additive model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.kT       thawed            2        0.001          100        keV
   mdl.tau      thawed           10       0.0001          200           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

Attribute Definition
kT The temperature, in keV.
tau The optical depth of the plasma.
norm The model normalization: see [1] for more details.

References

XSPEC version

CIAO 4.16 comes with support for version 12.13.1e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.13.1e

Bugs

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