THE CORONA OF THE BROAD-LINE RADIO GALAXY 3C 390.3

Abstract

We present the results from a joint Suzaku/NuSTAR broadband spectral analysis of 3C 390.3. The high quality data enables us to clearly separate the primary continuum from the reprocessed components allowing us to detect a high energy spectral cut-off (E 117 cut 14 18 = -+ keV), and to place constraints on the Comptonization parameters of the primary continuum for the first time. The hard over soft compactness is 69 24 124 -+ and the optical depth is 4.1 , 3.6 0.5 -+ this leads to an electron temperature of 30 8 32 -+ keV. Expanding our study of the Comptonization spectrum to the optical/