Synopsis
The XSPEC thcomp convolution model: Thermally comptonized continuum.
Syntax
xsthcomp The xsthcomp model is a convolution model component.
Description
The model is described at [1] .
Example
>>> create_model_component("xsthcomp", "mdl") >>> print(mdl)
Create a component of the xsthcomp model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.Gamma_tau thawed 1.7 1.001 10 mdl.kT_e thawed 50 0.5 150 keV mdl.cov_frac thawed 1 0 1 mdl.z frozen 0 0 5
ATTRIBUTES
The attributes for this object are:
Attribute | Definition |
---|---|
Gamma_tau | The low-energy power-law photon index when positive and the Thomson optical depth (multiplied by -1) when negative. |
kT_e | The electron temperature (high energy rollover) |
cov_frac | The scattering fraction (between 0 and 1). If 1 then all of the seed photons will be Comptonized, and if 0 then only the original seed photons will be seen. |
z | redshift |
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/XSmodelThcomp.html
Changes in CIAO
Added in CIAO 4.13
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.
See Also
- models
- xsnthcomp