Last modified: December 2018

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

xszsmdust

Context: models

Synopsis

The XSPEC zsmdust model: extinction by dust grains in starburst galaxies.

Syntax

xszsmdust

The xszsmdust model is a multiplivative model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

The EBV parameter has been renamed E_BmV to match the XSPEC definition. The name EBV can still be used to access the parameter, but this name will be removed in a future release.


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.E_BmV    thawed          0.1            0          100           
   mdl.ExtIndex thawed            1          -10           10           
   mdl.Rv       frozen          3.1            0           10           
   mdl.redshift frozen            0            0           20          z

ATTRIBUTES

The attributes for this object are:

E_BmV

The value of E(B-v) for the line of sight to the source.

ExtIndex

The spectral index of the extinction curve.

Rv

The ratio of total to selective extinction.

redshift

The redshift of the absorber.

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.