Last modified: December 2018

AHELP for CIAO 4.12 Sherpa v1


Context: models


convolve with the laor2 model shape. XSpec convolution model *Experimental*.


A convolution model to smooth a spectrum by relatavistic effects from an accretion disk around a rotating black hole. The accretion disk has a broken-power law emissivity profile. Uses Ari Loar's calculation including GR effects (ApJ 376, 90). Modified from laor2 model by Andy Fabian and Roderick Johnstone.

xskdblur2 Parameters

Number Name Description
1 Index Index: power law dependence of emissivity (scales as R^-Index)
2 Rin_G inner radius (units of GM/c^2)
3 Rout_G outer radius (units of GM/c^2)
4 Incl inclination (degrees)
5 Rbreak radius atr which emissivity power-law index changes
6 Index1 Emissivity power-law index for radii > Rbreak

Loading the X-Spec convolution models

Please see ahelp xsconvolve for information on how to load the 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.


sherpa> from sherpa_contrib.xspec.xsconvolve import load_xskdblur2
sherpa> load_xskdblur2("kdb2")
sherpa> set_source(kdb2( +
sherpa> kdb2.index = 1.5
sherpa> kdb2.rin_g = 10

The powerlaw and gaussian components are convolved by the kdblur2 model, with index set to 1.5 and the inner radius 10.

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.


For a list of known bugs and issues with the XSPEC models, please visit the XSPEC bugs page.

See Also

list_model_components, list_models, load_xscflux, load_xsclumin, load_xscpflux, load_xsgsmooth, load_xsireflect, load_xskdblur, load_xskerrconv, load_xslsmooth, 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