compST: Comptonization, Sunyaev & Titarchuk
A Comptonization spectrum after Sunyaev and Titarchuk 1980, A&A, 86, 121. This model is the Comptonization of cool photons on hot electrons.
par1 |
temperature in keV |
par2 |
optical depth |
norm |
, where N is the total number of photons from the source, d is the distance to the source, and f is the factor . z is the spectral index, y is the injected photon energy in units of the temperature, and G is the incomplete gamma function. |