SDSS J110012.38+084616.3: A Compton-thick or X-ray weak AGNquestionMark

The space density of the most powerful absorbed AGN (QSO2) and theircontribution to the AGN luminosity output remains uncertain. Many of theseobjects are severely attenuated, so hard Xray surveys alone do not fully provethe bulk of the obscured QSO population in the nearby Universe. We propose a 80ksec XMMNewton observation of an optically selected QSO2 at zvirgul0.1. Comparingits OIII and 210 keV luminosities the source is likely a Comptonthick AGN.However, the Xray spectral analysis seems to indicate that it might be insteadCompton thin and Xray weak. The proposed observations will allow us to unveilthe true nature of this source and will give us key information on whetherobjects such as this are intrinsically different to the QSO2 population detected in hard Xray surveys. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]