Last modified: December 2018

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

xsbmc

Context: models

Synopsis

The XSPEC bmc model: Comptonization by relativistic matter.

Syntax

xsbmc

The xsbmc model is an additive model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

The logA parameter has been renamed log_A to match the XSPEC definition. The name logA can still be used to access the parameter, but this name will be removed in a future release.


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.kT       thawed            1         0.01          100        keV
   mdl.alpha    thawed            1         0.01            4           
   mdl.log_A    thawed            0           -6            6           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

kT

The temperature of the thermal photon source in keV.

alpha

The energy spectral index.

log_A

The log of the A parameter: see [1] for more details.

norm

The normalization of the model: see [1] for an explanation of the units.

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.