HYPerluminous quasars at the Epoch of ReionizatION openParHYPERIONclosePar

The growth of Supermassive Black Holes powering luminous quasars at the Epoch ofReionization (EoR, z>6) is a hot topic in astrophysics. These quasars are beingcharacterized with large multiwavelength campaigns with current flagshipobservatories. Xray observations performed so far provided mostly < 15 countsin 0.510 keV spectra and thus a poor characterization of their properties. Wepropose HYPERION, a 2.3 Ms MultiYear Heritage programme, to dramaticallyimprove data quality to 100 counts for 15 luminous quasars at EoR, deliveringunprecedented constraints on nuclear properties, accretion, ejection,disc/corona complex. It will nicely complement observations at other wavelengthsenabling meaningful Xray spectroscopic studies at EoR to begin. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]