092151

A dedicated monitoring campaign with XMM Swift NICER Chandra and eROSITA overthe past 4+ years has unveiled a surprising second outburst from the tidaldisruption event (TDE) AT2018fyk. This dramatic X-ray and UV re-brightening hasbeen interpreted as the signature of a repeating partial TDE. We are requestinga 30 ks XMM exposure of AT2018fyk during the upcoming accretion shut off phasewhich is estimated to occur during mid-late 2023. Our main goal is to track theX-ray spectral evolution during this second outburst and compare it with theprevious flare. While we currently continue to track AT2018fyk with NICER andSwift through GO and DDT programs only XMM has large enough effective area andsensitivity to facilitate a high signal-to-noise spectrum in the next low-flux state. [truncated! Please see actual data for full text]