xsismdust

Context: models

Synopsis

The XSPEC ismdust model: Extinction due to a power-law distribution of dust grains.

Syntax

xsismdust

The xsismdust model is a multiplicative model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.msil     thawed            1            0       100000      10^-4
   mdl.mgra     thawed            1            0       100000      10^-4
   mdl.redshift frozen            0           -1           10

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
msil	The dust mass column for silicate (in units of 10^-4).
mgra	The dust mass column for graphite (in units of 10^-4).
redshift	The redshift of the absorber.

References

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