xssimpl

Context: models

Synopsis

The XSPEC simpl convolution model: comptonization of a seed spectrum.

Syntax

xssimpl

The xssimpl model is a convolution model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Gamma    thawed          2.3            1            5           
   mdl.FracSctr thawed         0.05            0            1           
   mdl.UpScOnly frozen            1            0          100

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
Gamma	The photon power law index.
FracSctr	The scattered fraction (between 0 and 1).
UpScOnly	A flag to switch between up-scattering only (when greater than zero) or both up- and down-scattering (when zero or less).

Notes

Unlike XSPEC, the convolution model is applied directly to the model, or models, rather than using the multiplication symbol.

References

[1]

Changes in CIAO

Added in CIAO 4.13

XSPEC version

CIAO 4.18 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.

/ sherpa4.18 / ahelp / xssimpl.html