Last modified: December 2018

URL: http://cxc.harvard.edu/sherpa/ahelp/xsdust.html
AHELP for CIAO 4.11 Sherpa v1

xsdust

Context: models

Synopsis

The XSPEC dust model: dust scattering.

Syntax

xsdust

The xsdust model is a multiplivative model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Frac     frozen        0.066            0            1           
   mdl.Halosz   frozen            2            0       100000           

ATTRIBUTES

The attributes for this object are:

Frac

The scattering fraction at 1 keV.

Halosz

The size of the halo at 1 keV in units of the detector beamsize.

References

XSPEC version

CIAO 4.11 comes with support for version 12.10.0e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.0e

Bugs

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