XSxscat¶

class sherpa.astro.xspec.XSxscat(name='xscat')[source]¶

Bases: sherpa.astro.xspec.XSMultiplicativeModel

The XSPEC xscat model: dust scattering.

The model is described at [1].

NH¶: Interstellar hydrogen column density (in units of 10^22 atoms/cm^2).

Xpos¶: The relative position of the dust along the line of sight. A value of 0 means the dust is at the observer, and of 0.95 means that the dust is 5% from the source.

Rext¶: The radius of the circular extraction region, in arcsec.

DustModel¶: The dust model used: see [1] for more information.

References

[1]	(1, 2) https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelXscat.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.
`reset`()
`set_center`(\args, \\*kwargs)
`startup`()
`teardown`()

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.

reset()¶

set_center(*args, **kwargs)¶

startup()¶

teardown()¶