Last modified: December 2018

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

xssresc

Context: models

Synopsis

The XSPEC sresc model: synchrotron spectrum, cut off by particle escape.

Syntax

xssresc

The xssresc model is an additive model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.alpha    thawed          0.5          0.3          0.8           
   mdl.rolloff  thawed     2.42e+17        1e+15        1e+19         Hz
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

alpha

The radio spectral index.

breakfreq

The break frequency: approximately the frequency at which the flux has dropped by a factor of 6 from a straight power law. See [1] for more details.

norm

The 1 Ghz flux in Jy.

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
xssrcut