xsnthcomp

Context: models

Synopsis

The XSPEC nthComp model: Thermally comptonized continuum.

Syntax

xsnthcomp

The xsnthcomp model is an additive model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Gamma    thawed          1.7        1.001           10           
   mdl.kT_e     thawed          100            1         1000        keV
   mdl.kT_bb    frozen          0.1        0.001           10        keV
   mdl.inp_type frozen            0            0            1        0/1
   mdl.redshift frozen            0       -0.999           10           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
Gamma	The asymptotic power-law photon index.
kT_e	The electron temperature (high-energy rollover) in keV.
kT_bb	The seed photon temperature (low-energy rollover) in keV.
inp_type	The seed photon source: when 0 use a blackbody, when 1 use a disk-blackbody.
redshift	The redshift.
norm	The normalization of the model: see [1] for more details.

References

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

XSPEC version

CIAO 4.16 comes with support for version 12.13.1e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.13.1e

Bugs

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