XSlyman

class sherpa.astro.xspec.XSlyman(name='lyman')

Bases: sherpa.astro.xspec.XSMultiplicativeModel

The XSPEC lyman model: Voigt absorption profiles for H I or He II Lyman series.

The model is described at [1].

Note

Deprecated in Sherpa 4.10.0

The nHeI and redshift parameters have been renamed to n and z respectively to match the XSPEC definition. The names nHeI and redshift can still be used to access the parameters, but they will be removed in a future release.

n

The H I or He II column density, in 10^22 atoms/cm^2.

b

The b value, in km/s.

z

The redshift of the absorber.

ZA

The atomic number of the species being calculated.

See also

XSheilin

References

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