The XSPEC apec model: APEC emission spectrum.
xsapec The xsapec model is an additive model component.
The model is described at  . The set_xsabund and get_xsabund functions change and return the current settings for the relative abundances of the metals. The set_xsxset and get_xsxset functions are used to set and query the XSPEC XSET parameters, in particular the keywords "APECROOT", "APECTHERMAL", "APECVELOCITY", and "APEC_TRACE_ABUND".
>>> create_model_component("xsapec", "mdl") >>> print(mdl)
Create a component of the xsapec model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.kT thawed 1 0.008 64 keV mdl.Abundanc frozen 1 0 5 mdl.redshift frozen 0 -0.999 10 mdl.norm thawed 1 0 1e+24
The attributes for this object are:
The temperature of the plasma, in keV.
The metal abundance of the plasma, as defined by the set_xsabund function and the "APEC_TRACE_ABUND" xset keyword.
The redshift of the plasma.
The normalization of the model: see  for an explanation of the units.
-  https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelApec.html
CIAO 4.11 comes with support for version 12.10.0e of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.10.0e
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.