COMPPS model computes Comptonization spectra is different geometries
using exact numerical solution of the radiative transfer equation.
The computational "iterative scattering method" is
similar to the standard Lambda-iteration and is described in
Poutanen J., Svensson R., 1996, ApJ, 470, 249 (PS96).
This model has been incorporated to XSPEC 12 as a standard model.
Atmosphere model for X-ray bursting neutron star
accounting for Compton scattering using relativistic kinetic equation
and exact redistribution function.
If you use the model for the data analysis, please, refer to
Suleimanov V. et al. 2011, A&A, 527, A139
Suleimanov V. et al. 2012, A&A, 545, A120
Theoretical spectra of X-ray bursting neutron star (NS) model atmospheres
are widely used for determination of the NS basic parameters such as their
masses and radii. Compton scattering, that plays an important role in
spectra formation at high luminosities, is often accounted for using the
differential Kompaneets operator, while in other models a more general,
integral operator for the Compton scattering kernel is used. We construct
here accurate NS atmosphere models using exact treatment of Compton
scattering with the integral relativistic kinetic equation and exact
relativistic angle-dependent redistribution function.
Xspec model file
Atmosphere model spectra (fluxes)
lmodel_burstatmo.dat, to be copied to lmodel.dat file