Synopsis
The XSPEC step model: step function convolved with gaussian.
Syntax
xsstep The xsstep model is an additive model component.
Description
The model is described at [1] .
Example
>>> create_model_component("xsstep", "mdl")
>>> print(mdl)Create a component of the xsstep model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.Energy thawed 6.5 0 100 keV mdl.Sigma thawed 0.1 0 20 keV mdl.norm thawed 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| Energy | The start energy, in keV. |
| Sigma | The gaussian sigma, in keV. |
| norm | The step amplitude. |
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelStep.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.