Last modified: December 2018

URL: http://cxc.harvard.edu/sherpa/ahelp/xsswind1.html
AHELP for CIAO 4.11 Sherpa v1

xsswind1

Context: models

Synopsis

The XSPEC swind1 model: absorption by partially ionized material with large velocity shear.

Syntax

xsswind1

The xsswind1 model is a multiplivative model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

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


Example

>>> create_model_component("xsswind1", "mdl")
>>> print(mdl)

Create a component of the xsswind1 model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.column   thawed            6            3           50           
   mdl.log_xi   thawed          2.5          2.1          4.1           
   mdl.sigma    thawed          0.1            0          0.5           
   mdl.redshift frozen            0       -0.999           10           

ATTRIBUTES

The attributes for this object are:

column

The column density, in units of 10^22 cm^2.

log_xi

The log of xi: see [1] for more details.

sigma

The gaussian sigma for velocity smearing (v/c).

redshift

The redshift of the source.

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.