The XSPEC nsagrav model: NS H atmosphere model for different g.
xsnsagrav The xsnsagrav model is an additive model component.
The model is described at  .
>>> create_model_component("xsnsagrav", "mdl") >>> print(mdl)
Create a component of the xsnsagrav model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.LogT_eff thawed 6 5.5 6.5 K mdl.NSmass thawed 1.4 0.3 2.5 Msun mdl.NSrad thawed 10 6 20 km mdl.norm thawed 1 0 1e+24
The attributes for this object are:
The log of Teff, the unredshifted effective temperature.
The neutron star gravitational mass, in units of the solar mass.
The "true" neutron star radius, in km.
The normalization is 1/D^2, where D is the distance to the neutron star in pc.
-  https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelNsagrav.html
CIAO 4.12 comes with support for version 12.10.1n of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.10.1n
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.