Skip to main content

The NASA/GSFC network is currently experiencing intermittent issues that affect our services. We are working on it and apologize for the inconvenience.
The offline tool hark (also on github) can be used to find and download data from the cloud.

Xspec Home Page


refsch: reflected power law from ionized accretion disk

Exponentially cut-off power-law spectrum reflected from an ionized relativistic accretion disk. In this model, spectrum of pexriv is convolved with a relativistic disk line profile diskline. See Magdziarz & Zdziarski (1995) for details of Compton reflection. See Fabian et al. (1989) for details of the disk line profile.

par1 $\Gamma$, power law photon index, $N_E \propto E^{-\Gamma}$
par2 $E_c$, cutoff energy (keV) (if $E_c = 0$ there is no cutoff)
par3 $rel_{refl}$, reflection scaling factor (0 = no direct component, 1 corresponds to an isotropic source above disk)
par4 redshift, z
par5 abundance of elements heavier than He relative to the solar abundances
par6 iron abundance relative to that defined by abund
par7 inclination angle (degrees)
par8 disk temperature in K
par9 disk ionization parameter, $\xi = 4\pi{F_{ion}\over{n}}$, where $F_{ion}$ is the 5eV – 20keV irradiating flux, $n$ is the density of the reflector; see Done et al. (1992).
par10 $e$, power law dependence of emissivity. the emissivity $\propto R^e$
par11 inner radius (units of $GM/c^2$)
par12 outer radius (units of $GM/c^2$)
par13 internal model accuracy - points of spectrum per energy decade
norm photon flux at 1 keV (photons/keV/cm$^2$/s) of the cutoff broken power-law only (no reflection) in the observed frame.