Last modified: December 2018

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

xseplogpar

Context: models

Synopsis

The XSPEC eplogpar model: log-parabolic blazar model with nu-Fnu normalization.

Syntax

xseplogpar

The xseplogpar model is an additive model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Ep       thawed          0.1        1e-06          100        keV
   mdl.beta     thawed          0.2           -4            4           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

Ep

The peak energy, in keV, of the nu-Fnu curve.

beta

The curvature term.

norm

The flux in nu-Fnu units at the energy Ep.

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
xslogpar