084404

We have discovered an unprecedentedly long openPar > 10 yrsclosePar X-ray tidal disruption event candidate. It showed several interesting signatures of super-Eddington accretiondoublePoint quasisoft X-ray spectra comma Eddington-limited luminosity comma and later transition to the thermal state of much softer spectra. Therefore this event provides a unique opportunity for study of super-Eddington accretion onto supermassive black holes. The source now apprears to be in the thermal state. we request XMM-Newton to have one more observation in AO18 on this target comma two years after the last monitoring and when the event is turning to a phase of faster decay. Continued monitoring is critical for the modeling of the event and confirmation of its nature as the most spectacular tidal disruption event known.