The XMM-Newton view of the super-Eddington accreting QSO J1641 at z=6.047

We propose a 100 ks XMMNewton observation of J1641, a z6.047 QSO accreting ata super Eddington rate (lEdd1.5). Our exploratory Chandra observation of thisobject (virgul48 net counts) reveals extremely bright Xray emission, 9 timesbrighter than the expectation based on its UV luminosity, in contrast to ourknowledge of accretion at high Eddington ratio. Thanks to the extremely brightXray emission of the target, the new XMMNewton observation will collect virgul400net counts, which is the largest number of Xray photons for a z>6 QSO, allowingus to constrain tightly the X ray properties of this QSO, in particular itsluminosity and photon index, and to check for variability. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]