MKN668 AND HIS BROTHERS: ARE THE AGN IN GPS GALAXIES OBSCUREDquestionMark

A recent XMMNewton observation of Mrk668 has uncovered for the first timesignatures of hot (Tvirgul10^7 K) gas in the Xray spectrum of a GHz Peaked Spectrumradio source, together with the first evidence for a Comptonthick absorbedradio loudAGN. We propose to observe during the XMMNewton AO3 3 GPS radiogalaxies detected by ROSAT, none of them ever observed in hard Xrays so far. Wecomplement our request with 2 GPS radio galaxies detected by Chandra in snapshot(5 ks) observations, to obtain their first good quality Xray spectrum. Thisprogram will more than double the number of GPS galaxies, for which hard Xraymeasurements are available. The total requested allocation time for this programis 100 ks. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]