Synopsis
The XSPEC slimbh model: Stationary slim accretion disk.
Syntax
xsslimbh The xsslimbh model is an additive model component.
Description
The model is described at [1] . The set_xsxset and get_xsxset functions are used to set and query the XSPEC XSET "SLIMBB_DEBUG", "SLIMBB_DIR", and "SLIMBB_TABLE" parameters.
Example
>>> create_model_component("xsslimbh", "mdl")
>>> print(mdl)Create a component of the xsslimbh model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.M frozen 10 0 1000 Msun mdl.a thawed 0 0 0.999 GM/c mdl.lumin thawed 0.5 0.05 1 L_Edd mdl.alpha frozen 0.1 0.005 0.1 mdl.inc frozen 60 0 85 deg mdl.D frozen 10 0 10000 kpc mdl.f_hard frozen -1 -10 10 mdl.lflag frozen 1 -3.40282e+38 3.40282e+38 mdl.vflag frozen 1 -3.40282e+38 3.40282e+38 mdl.norm frozen 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| M | The mass of the black hole, in M_sol. |
| a | The black hole spin parameter. |
| lumin | The total disk luminosity in Eddington units. |
| alpha | alpha-viscosity |
| inc | The inclination, in degrees. |
| D | The distance to the source, in kpc. |
| f_hard | The hardening factor. A negative value means to use TLUSTY spectra. |
| lflag | A flag to control the effect of limb-darkening. If greater than zero then the disk emission is limb-darkened, otherwise it is assumed to be isotropic. |
| vflag | A flag to control the surface profile. If greater than zero, raytracing is done from the actual photosphere, otherwise the spectrum is raytraced from the equatorial plane ignoring the height profile of the disk. |
| norm | The normalization of the model: see [1] for an explanation of the units. |
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelSlimbh.html
XSPEC version
CIAO 4.17 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.14.0k
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.