    The XSPEC bexrav model: reflected e-folded broken power law, neutral medium.

xsbexrav
The xsbexrav model is an additive model component.

The model is described at [1] .

>>> create_model_component("xsbexrav", "mdl")
>>> print(mdl)

Create a component of the xsbexrav model and display its default parameters. The output is:

mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.Gamma1 thawed 2 -10 10 mdl.breakE thawed 10 0.1 1000 keV mdl.Gamma2 thawed 2 -10 10 mdl.foldE thawed 100 1 1e+06 keV mdl.rel_refl thawed 0 0 10 mdl.cosIncl frozen 0.45 0.05 0.95 mdl.abund frozen 1 0 1e+06 mdl.Fe_abund frozen 1 0 1e+06 mdl.redshift frozen 0 -0.999 10 mdl.norm thawed 1 0 1e+24

ATTRIBUTES

The attributes for this object are:

Attribute
Definition
Gamma1
The power-law index of the first power-law component.
breakE
The break energy, in keV.
Gamma2
The power-law index of the second power-law component.
foldE
The e-folding energy (Ec) in keV. If zero there is no cut off.
rel_refl
The reflection scaling parameter (a value of 1 for an isotropic source above the disk).
cosIncl
The cosine of the inclination angle.
abund
The abundance of the elements heavier than He relative to their solar abundance, as set by the set_xsabund function.
Fe_abund
The iron abundance relative to the solar abundance, as set by the set_xsabund function.
redshift
The redshift of the source.
norm
The normalization of the model: see [1] for an explanation of the units.

Notes

The precision of the numerical integration can be changed by using the set_xsxset function to set the value of the BEXRAV_PRECISION keyword, which defines the fractional precision. The default is 0.01 (1%).

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelBexrav.html

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

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

December 2023