Understanding the Super-Eddington phase in a Decade-long Tidal Disruption Event

We have discovered a decadelong Xray tidal disruption candidate, which recentobservations suggest to be still in the superEddington accretion phase but withsporadic dramatic spectral softening. We request three XMMNewton monitorings inAO16 on this target, which is unique for study of the superEddington accretiononto supermassive black holes. The goals are to confirm its still being in thesuperEddington accretion phase and to measure the spectral softening occurrencerate, allowing us to determine whether the spectral softening is due totransient highspeed warm absorbers or state transition. We also request an HSTorbit to help confirm the nuclear origin of the event and study its environment. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]