The young and bright type ia supernova asassn-141p: discovery, early-time observations, first-light time, distance to ngc 4666, and progenitor constraints

Abstract

On 2014 December 9.61, the All-sky Automated Survey for SuperNovae (ASAS-SN or "Assassin") discovered ASASSN-141p just similar to 2 days after first light using a global array of 14 cm diameter telescopes. ASASSN-141p went on to become a bright supernova