Last modified: December 2021

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xsismdust.html
AHELP for CIAO 4.14 Sherpa

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

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.

See Also

models
xsolivineabs