XSnsa

class sherpa.astro.xspec.XSnsa(name='nsa')[source] [edit on github]

Bases: sherpa.astro.xspec.XSAdditiveModel

The XSPEC nsa model: neutron star atmosphere.

The model is described at [1].

LogT_eff

The log of Teff, the unredshifted effective temperature.

M_ns

The neutron star gravitational mass, in units of the solar mass.

R_ns

The neutron star radius, in km.

MagField

The neutron star magnetic field strength, in Gauss. It must be fixed at one of 0, 1e12, or 1e13 G.

norm

The normalization is 1/D^2, where D is the distance to the neutron star in pc.

See also

XSnsagrav

References

[1]https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelNsa.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) [edit on github]
calc(pars, xlo, *args, **kwargs) [edit on github]
get_center() [edit on github]
guess(dep, *args, **kwargs) [edit on github]

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) [edit on github]
reset() [edit on github]
set_center(*args, **kwargs) [edit on github]
startup() [edit on github]

Called before a model may be evaluated multiple times.

See also

teardown()

teardown() [edit on github]

Called after a model may be evaluated multiple times.

See also

setup()