Last modified: December 2018

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

xsexpfac

Context: models

Synopsis

The XSPEC expfac model: exponential modification.

Syntax

xsexpfac

The xsexpfac model is a multiplivative model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Ampl     thawed            1            0       100000           
   mdl.Factor   thawed            1            0       100000           
   mdl.StartE   frozen          0.5            0       100000        keV

ATTRIBUTES

The attributes for this object are:

Ampl

The amplitude of the effect.

Factor

The exponential factor.

StartE

The start energy of the modification, in keV.

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.