xscph

Context: models

Synopsis

The XSPEC cph model: Cooling + heating model for cool core clusters

Syntax

xscph

The xscph model is an additive model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.peakT    thawed          2.2          0.1          100        keV
   mdl.Abund    frozen            1            0         1000           
   mdl.Redshift frozen            0            0           50           
   mdl.switch   frozen            1 -3.40282e+38  3.40282e+38           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
peakT	The peak temperature, in keV.
Abund	The abundance, relative to Solar.
Redshift	The redshift.
switch	If 0 calculate, if 1 interpolate, if 2 use AtomDB data.
norm	The mass accretion rate, in solar mass per year.

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelCph.html

Changes in CIAO

Changed in CIAO 4.14

The default Redshift parameter value has changed from 0.1 to 0 to match XSPEC.

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.