    The XSPEC bexriv model: reflected e-folded broken power law, ionized medium.

xsbexriv
The xsbexriv model is an additive model component.

The model is described at [1] .

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

Create a component of the xsbexriv 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 1e+06 mdl.redshift frozen 0 -0.999 10 mdl.abund frozen 1 0 1e+06 mdl.Fe_abund frozen 1 0 1e+06 mdl.cosIncl frozen 0.45 0.05 0.95 mdl.T_disk frozen 30000 10000 1e+06 K mdl.xi thawed 1 0 5000 erg cm/s 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).
redshift
The redshift of the source.
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.
cosIncl
The cosine of the inclination angle.
T_disk
The disk temperature in K.
xi
The disk ionization parameter: see [1] for an explanation.
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 BEXRIV_PRECISION keyword, which defines the fractional precision. The default is 0.01 (1%).

References

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