UV rebrightening tagged posts

NASA’s artist impression of SN 2006gy, one of the most luminous hypernovae seen. Credit: NASA/CXC/M.Weiss

An international team has spotted a surprising UV rebrightening in a distant superluminous supernova, ASASSN-15lh. The event has baffled the scientists as has no hydrogen emission characteristic of superluminous supernovae and tidal disruption events. Also called hypernovae, these are dozens of times more luminous than normal supernovae. ASASSN-15lh, detected by the All Sky Automated Survey for SuperNovae (ASAS-SN) in 2015, is a real ‘assassin’ among these explosion events. It is about 200X more powerful than the average supernova and approximately 570 billion times brighter than our sun. It is so far the most luminous supernova ever detected.

Now, Brown et al have used data from NASA’...