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

Changes in CIAO

New in CIAO 4.14

The xsismdust model (added in XSPEC 12.11.0) is new in CIAO 4.14.

XSPEC version

CIAO 4.14 comes with support for version 12.12.0 of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.12.0

Bugs

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