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-10        10000        keV
   mdl.beta     thawed          0.2           -4            4           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
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

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

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.