Synopsis
The XSPEC simpl convolution model: comptonization of a seed spectrum.
Syntax
xssimpl The xssimpl model is a convolution model component.
Description
The model is described at [1] .
Example
>>> create_model_component("xssimpl", "mdl")
>>> print(mdl)Create a component of the xssimpl model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.Gamma thawed 2.3 1 5 mdl.FracSctr thawed 0.05 0 1 mdl.UpScOnly frozen 1 0 100
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| Gamma | The photon power law index. |
| FracSctr | The scattered fraction (between 0 and 1). |
| UpScOnly | A flag to switch between up-scattering only (when greater than zero) or both up- and down-scattering (when zero or less). |
Notes
Unlike XSPEC, the convolution model is applied directly to the model, or models, rather than using the multiplication symbol.
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelSimpl.html
Changes in CIAO
Added in CIAO 4.13
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.