xsnsagrav

Context: models

Synopsis

The XSPEC nsagrav model: NS H atmosphere model for different g.

Syntax

xsnsagrav

The xsnsagrav model is an additive model component.

Description

The model is described at [1] .

Example

>>> 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

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
LogT_eff	The log of Teff, the unredshifted effective temperature.
NSmass	The neutron star gravitational mass, in units of the solar mass.
NSrad	The "true" neutron star radius, in km.
norm	The normalization is 1/D^2, where D is the distance to the neutron star in pc.

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelNsagrav.html

XSPEC version

CIAO 4.15 comes with support for version 12.12.1c of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.12.1c

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.