XSkerrd¶

class sherpa.astro.xspec.XSkerrd(name='kerrd')[source]¶

Bases: sherpa.astro.xspec.XSAdditiveModel

The XSPEC kerrd model: optically thick accretion disk around a Kerr black hole.

The model is described at [1].

Note

Deprecated in Sherpa 4.10.0

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

distance¶: The distance, in units of kpc.

TcoloTeff¶: The spectral hardening factor, Tcol/Teff. See [1] for more details.

M¶: The mass of the central object, in solar masses.

Mdot¶: The mass accretion rate in units of 10^18 g/s.

Incl¶: The disk inclination angle, in degrees. A face-on disk has Incl=0.

Rin¶: The inner radius, in units of GM/c^2. The last stable orbit is 1.235.

Rout¶: The outer radius, in units of GM/c^2.

norm¶: The normalization of the model. It should be fixed to 1.

See also

XSlaor

References

[1]	(1, 2) https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelKerrd.html

Attributes Summary

`thawedparhardmaxes`
`thawedparhardmins`
`thawedparmaxes`
`thawedparmins`
`thawedpars`
`version_enabled`

Methods Summary

`apply`(outer, otherargs, *otherkwargs)
`calc`(pars, xlo, args, *kwargs)
`get_center`()
`guess`(dep, args, *kwargs)	Set an initial guess for the parameter values.
`regrid`(*arrays)
`reset`()
`set_center`(args, *kwargs)
`startup`()	Called before a model may be evaluated multiple times.
`teardown`()	Called after a model may be evaluated multiple times.

Attributes Documentation

thawedparhardmaxes¶

thawedparhardmins¶

thawedparmaxes¶

thawedparmins¶

thawedpars¶

version_enabled = True¶

Methods Documentation

apply(outer, *otherargs, **otherkwargs)¶

calc(pars, xlo, *args, **kwargs)¶

get_center()¶

guess(dep, *args, **kwargs)¶

Set an initial guess for the parameter values.

Attempt to set the parameter values, and ranges, for the model to match the data values. This is intended as a rough guess, so it is expected that the model is only evaluated a small number of times, if at all.

regrid(*arrays)¶

reset()¶

set_center(*args, **kwargs)¶

startup()¶: Called before a model may be evaluated multiple times.

See also

teardown()

teardown()¶: Called after a model may be evaluated multiple times.

See also

setup()