xsnsx

Context: models

Synopsis

The XSPEC nsx model: neutron star with a non-magnetic atmosphere.

Syntax

xsnsx

The xsnsx model is an additive model component.

Description

The model is described at [1] .

Example

>>> create_model_component("xsnsx", "mdl")
>>> print(mdl)

Create a component of the xsnsx model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.logTeff  thawed            6          5.5          6.7          K
   mdl.M_ns     thawed          1.4          0.5            3       Msun
   mdl.R_ns     thawed           10            5           30         km
   mdl.dist     thawed            1         0.01          100        kpc
   mdl.specfile frozen            6 -3.40282e+38  3.40282e+38           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
LogTeff	The log of Teff, the unredshifted surface effective temperature.
M_ns	The neutron star gravitational mass, in units of the solar mass.
R_ns	The neutron star radius, in km.
dist	The distance to the neutron star, in kpc.
specfile	Which model to use: see [1] for more details.
norm	The normalization: see [1] for more details.

References

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

XSPEC version

CIAO 4.17 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.14.0k

Bugs

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