Synopsis
The XSPEC expfac model: exponential modification.
Syntax
xsexpfac The xsexpfac model is a multiplicative model component.
Description
The model is described at [1] .
Example
>>> create_model_component("xsexpfac", "mdl")
>>> print(mdl)Create a component of the xsexpfac model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.Ampl thawed 1 0 1e+06 mdl.Factor thawed 1 0 1e+06 mdl.StartE frozen 0.5 0 1e+06 keV
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| Ampl | The amplitude of the effect. |
| Factor | The exponential factor. |
| StartE | The start energy of the modification, in keV. |
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelExpfac.html
XSPEC version
CIAO 4.17 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.