XSacisabs

class sherpa.astro.xspec.XSacisabs(name='acisabs')

Bases: sherpa.astro.xspec.XSMultiplicativeModel

The XSPEC acisabs model: Chandra ACIS q.e. decay.

The model is described at [1].

Tdays

Days between Chandra launch and ACIS observation.

norm

tauinf

Slope of linear quantum efficiency decay.

tefold

Offset of linear quantum efficiency decay.

nC

Number of carbon atoms in hydrocarbon.

nH

Number of hydrogen atoms in hydrocarbon.

nO

Number of oxygen atoms in hydrocarbon.

nN

Number of nitrogen atoms in hydrocarbon.

References

[1]	https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelAcisabs.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()