xsvbremss

Context: models

Synopsis

The XSPEC vbremss model: thermal bremsstrahlung.

Syntax

xsvbremss

The xsvbremss model is an additive model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

The heh parameter has been renamed heovrh to match the XSPEC definition. The name heh can still be used to access the parameter, but this name will be removed in a future release.

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.kT       thawed            3       0.0001          200        keV
   mdl.HeovrH   thawed            1            0          100           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
kT	The plasma temperature in keV.
HeovrH	The ratio n(He) / n(H).
norm	The normalization of the model: see [1] for an explanation of the units.

References

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

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.