Chasing quasar 2 with XMM

Highly obscured quasarvirgul2 have been proposed as the main contributorsto the hard Xray background. Despite years of searches only anhandful of such sources is known. We propose to observe with XMM asample of 9 relatively bright (F(510 keV)210E13 cgs) High EnergyLLarge Area Survey. (HELLAS) Xray sources, discovered by the BeppoSAXMECS in the hard Xray band 510 keV. We selected the sourcesaccording to two criteria: a) highest hardness ratio in the 210 keVband; highest ratio between the MECS 510 band and the ROSAT 0.52 keVband. This should select obscured sources in which the nucleus truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]