The XSPEC edge model: absorption edge.
xsedge The xsedge model is a multiplicative model component.
The model is described at  .
>>> create_model_component("xsedge", "mdl") >>> print(mdl)
Create a component of the xsedge model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.edgeE thawed 7 0 100 keV mdl.MaxTau thawed 1 0 5
The attributes for this object are:
The threshold edge, in keV.
The absorption depth at the threshold.
-  https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelEdge.html
CIAO 4.12 comes with support for version 12.10.1n of the XSPEC models. This can be checked with the following:
% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())' 12.10.1n
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.