Fast blue optical transient
In astronomy, a fast blue optical transient is a transient bright pulse lasting a very short time, caused by some very high-energy astrophysical process not yet understood. There have been a few FBOTs reported, the most famous being SN 2018cow and, in March 2020, the ZTF18abvkwla. More recently, in May 2020, a much more powerful FBOT was reported. According to Deanne Coppejans, first author of the study, "This was unexpected... We know of energetic explosions that can eject material at almost the speed of light, specifically gamma ray bursts, but they only launch a small amount of mass – about 1 millionth the mass of the sun. CSS161010 launched 1 to 10 percent the mass of the sun at more than half the speed of light – evidence that this is a new class of transient."
