xsgsmooth

Context: models

Synopsis

The XSPEC gsmooth convolution model: gaussian smoothing

Syntax

xsgsmooth

The xsgsmooth model is a convolution model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Sig_6keV thawed            1            0           20        keV
   mdl.Index    frozen            0           -1            1

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
Sig_6keV	gaussian sigma at 6 keV
Index	power of energy for sigma variation

Notes

Unlike XSPEC, the convolution model is applied directly to the model, or models, rather than using the multiplication symbol.

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelGsmooth.html

Changes in CIAO

Changed in CIAO 4.14

The XSPEC model parameter was renamed from Sig@6keV to Sig_6keV so this is now the name of the parameter. The old name (SigAt6keV) can still be used but will be removed in a future release.

Added in CIAO 4.13

XSPEC version

CIAO 4.17 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.14.0k

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.