Last modified: December 2018

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

xszagauss

Context: models

Synopsis

The XSPEC zagauss model: gaussian line profile in wavelength space.

Syntax

xszagauss

The xszagauss model is an additive model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.LineE    thawed           10            0        1e+06          A
   mdl.Sigma    thawed            1            0        1e+06          A
   mdl.Redshift frozen            0       -0.999           10           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

LineE

The line wavelength, in Angstrom.

Sigma

The line width, in Angstrom. A value of zero means a delta function.

Redshift

The redshift of the line.

norm

The flux in the line, in units of photon/cm^2/s.

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.

See Also

models
xsagauss, xsgaussian, xszgauss