why is ASASSN 15pz supernova so bright and hot? Ai to detect an anomalies in space

ASASSN-15pz is an extreme example of a transient object called a superluminous supernova, discovered on May 24, 2015 in a galaxy in the constellation Pegasus The supernova was discovered by ASASSN, the All-Sky Automated Survey for SuperNovae, which is a network of eight wide-field telescopes in Hawaii, Arizona, and Chile that search for supernovae