XMM-Newton discovery of a Compton-thick AGN in the GPS galaxy Mkn 668
XMM-Newton discovery of a Compton-thick AGN in the GPS galaxy Mkn 668
We report the XMM-Newton discovery of the first Compton-thick obscured AGN in a Broad Line Radio Galaxy, the Gigahertz Peaked-Spectrum source Mkn 668 (OQ+208). The remarkably flat 2–10 keV X-ray spectrum (observed photon index, 0.7), with a prominent iron Kα fluorescent emission line, is a clear signature of a Compton-reflection …