Roaring to softly whispering: Persistent X-ray emission at the location of the Fast Blue Optical Transient AT2018cow $\sim$3.7 yrs after discovery and implications on accretion-powered scenarios

G. Migliori, R. Margutti, B. D. Metzger +11

We present the first deep X-ray observations of a luminous FBOT AT2018cow, at $\sim 3.7\mathrm{yr}$ since discovery, together with the re-analysis of the observation at $\delta t\sim 220$ d…