    The XSPEC diskir model: Irradiated inner and outer disk.

xsdiskir
The xsdiskir model is an additive model component.

The model is described at [1] .

The lcld parameter has been renamed lcovrld to match the XSPEC definition. The name lcld can still be used to access the parameter, but this name will be removed in a future release.

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

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

mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.kT_disk thawed 1 0.01 5 keV mdl.Gamma thawed 1.7 1.001 10 mdl.kT_e thawed 100 1 1000 keV mdl.LcovrLd thawed 0.1 0 10 mdl.fin frozen 0.1 0 1 mdl.rirr thawed 1.2 1.0001 10 mdl.fout thawed 0.0001 0 0.1 mdl.logrout thawed 5 3 7 mdl.norm thawed 1 0 1e+24

ATTRIBUTES

The attributes for this object are:

Attribute
Definition
kT_disk
The temperature of the innermost part of the unilluminated disk, in keV.
Gamma
The asymptotic power-law photon index.
kT_e
The electron temperature (high-energy rollover) in keV.
LcovrLd
The ratio of the luminosity in the Compton tail to that of the unilluminated disk.
fin
The fraction of luminosity in the Compton tail which is thermalized in the inner disk. Generally fix at 0.1 as appropriate for an albedo of 0.3 and solid angle of 0.3.
rirr
The radius of the Compton illuminated disk in terms of the inner disk radius.
fout
The fraction of bolometric flux which is thermalized in the outer disk.
logrout
The log (base 10) of the outer disk radius in terms of the inner disk radius.
norm
The model normalization: it is the same definition as used for the xsdiskbb model.

References

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