The puzzling X-ray quasi-periodic eruptions in RX J1301.9+2747

Xray quasiperiodic eruptions (QPEs) are a new phenomenon associated tononstationary accretion onto supermassive black holes (SMBH) in lowmassgalaxies. RX J1301.9+2747 (RX J1302) is one of the four galaxies where QPEs havebeen detected so far, and the only one with QPEs lasting for decades Inaddition, the QPEs display multiple patterns of quasiperiodicity which is apuzzling behavior never seen before. We ask for a twoorbitslong XMMNewtonobservation of the galaxy RX J1302, coordinated with 20 hours of VLA radioexposures, to confirm the alternate pattern of variability between cold/long andwarm/short QPEs, and explore the possible connections with the radio jet. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]