Synopsis
lorentzian smoothing. XSpec convolution model *Experimental*.
Description
Lorentzian smoothing with a variable width, which varies as the Index power of the energy. The width at 6 keV is set with the SigAt6keV parameter.
dC(E) = n(E) S(E) A(X) dX
n(E) = 1.0 / ( 2 pi [ (E-X)^2 + (S(E)/2)^2 ] )
S(E) = SigAt6keV (E/6)^Index
xslsmooth Parameters
| Number | Name | Description |
|---|---|---|
| 1 | SigAt6keV | The sigma for the lorentzian at 6 keV (in keV) |
| 2 | Index | Power of energy for sigma variation |
Loading the X-Spec convolution models
Please see ahelp xsconvolve for information on how to load the model.
Notes
- This is an experimental release of the convolution models; please take care when using this model.
XSpec version
This information is taken from the XSpec User's Guide. Version 12.10.0e of the XSpec models is supplied with CIAO 4.11.
Example
sherpa> from sherpa_contrib.xspec.xsconvolve import load_xslsmooth
sherpa> load_xslsmooth("lsm")
sherpa> set_source(lsm(xspowerlaw.pl))
sherpa> lsm.index = 1.5
sherpa> lsm.sigat6kev = 0.5The powerlaw is convolved by a lorentzian whose sigma varies as Energy^1.5 and is 0.5 keV at 6 keV.
About Contributed Software
This script is not an official part of the CIAO release but is made available as "contributed" software via the CIAO scripts page. Please see this page for installation instructions - such as how to ensure that the parameter file is available.
Bugs
For a list of known bugs and issues with the XSPEC models, please visit the XSPEC bugs page.
See Also
- models
- list_model_components, list_models, load_xscflux, load_xsclumin, load_xscpflux, load_xsgsmooth, load_xsireflect, load_xskdblur, load_xskdblur2, load_xskerrconv, load_xspartcov, load_xsrdblur, load_xsreflect, load_xsrfxconv, load_xsrgsxsrc, load_xssimpl, load_xsvashift, load_xsvmshift, load_xsxilconv, load_xszashift, load_xszmshift, models, tablemodel, xs, xsconvolve