xscoolflow

Context: models

Synopsis

The XSPEC coolflow model: cooling flow, mekal.

Syntax

xscoolflow

The xscoolflow model is an additive model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.lowT     thawed          0.1       0.0808         79.9        keV
   mdl.highT    thawed            4       0.0808         79.9        keV
   mdl.Abundanc thawed            1            0            5           
   mdl.Redshift frozen          0.1       -0.999           10           
   mdl.switch   frozen            2            0            3           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
lowT	The low temperature, in keV.
highT	The high temperature, in keV.
Abundanc	The abundance relative to Solar, as set by set_xsabund .
Redshift	The redshift of the plasma.
switch	If 0, the mekal code is run to evaluate the model; if 1 then interpolation of the mekal data is used; if 2 then interpolation of APEC data is used; if 3 then SPEX data. See [1] for more details. This parameter can not be thawed.
norm	The normalization of the model.

References

[1]

Changes in CIAO

Added in CIAO 4.17

XSPEC version

CIAO 4.18 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.