Synopsis
The XSPEC bvapec model: velocity broadened APEC thermal plasma model.
Syntax
xsbvapec The xsbvapec model is an additive model component.
Description
The model is described at [1] , with XSbapec describing how it is implemented in Sherpa.
Example
>>> create_model_component("xsbvapec", "mdl")
>>> print(mdl)Create a component of the xsbvapec model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.kT thawed 6.5 0.0808 68.447 keV mdl.He frozen 1 0 1000 mdl.C frozen 1 0 1000 mdl.N frozen 1 0 1000 mdl.O frozen 1 0 1000 mdl.Ne frozen 1 0 1000 mdl.Mg frozen 1 0 1000 mdl.Al frozen 1 0 1000 mdl.Si frozen 1 0 1000 mdl.S frozen 1 0 1000 mdl.Ar frozen 1 0 1000 mdl.Ca frozen 1 0 1000 mdl.Fe frozen 1 0 1000 mdl.Ni frozen 1 0 1000 mdl.Redshift frozen 0 -0.999 10 mdl.Velocity frozen 0 0 1e+06 km/s mdl.norm thawed 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
kT
The temperature of the plasma, in keV.
He, C, N, O, Ne, Mg, Al, Si, S, Ar, Ca, Fe, Ni
The abundance of the element in solar units.
Redshift
The redshift of the plasma.
Velocity
The gaussian sigma of the velocity broadening, in km/s.
norm
The normalization of the model: see [1] for an explanation of the units.
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelBapec.html
XSPEC version
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
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.