Coronal properties of the luminous radio-quiet quasar QSO B2202$-$209

E. S. Kammoun, G. Risaliti, D. Stern +8

We present an analysis of the joint $XMM$-$Newton$ and $NuSTAR$ observations of the radio-quiet quasar QSO B2202$-$209. Using an optical observation from the Hale Telescope at the…