Blackbody spectrum of an accretion disk. This is an extension of the diskbb model, including corrections for temperature distribution near the black hole. The temperature distribution was calculated in Paczynski-Wiita pseudo-Newtonian potential. An accretion rate can be computed from the maximum temperature found. For details see Gierlinski et al. (1999). Please note that the inner disk radius (par2) can be a free parameter only close to par2 = 6; otherwise par2 is strongly correlated with K.
|par1||maximum temperature in the disk (keV)|
|par2||inner disk radius in Rg = GM/c units, par2|
|norm||, where = central mass (solar masses), distance to the source (kpc), inclination of the disk, and color/effective temperature ratio.|