Synopsis
The XSPEC swind1 model: absorption by partially ionized material with large velocity shear.
Syntax
xsswind1 The xsswind1 model is a multiplicative 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:
| Attribute | Definition |
|---|---|
| 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
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelSwind1.html
XSPEC version
CIAO 4.16 comes with support for version 12.13.1e of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.13.1e
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.