  We present photometric and spectroscopic observations of ASASSN-13co, an
unusually luminous Type II supernova and the first core-collapse supernova
discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). First
detection of the supernova was on UT 2013 August 29 and the data presented span
roughly 3.5 months after discovery. We use the recently developed model from
Pejcha & Prieto (2015) to model the multi-band light curves of ASASSN-13co and
derive the bolometric luminosity curve. We compare ASASSN-13co to other Type II
supernovae to show that it was unusually luminous for a Type II supernova and
that it exhibited an atypical light curve shape that does not cleanly match
that of either a standard Type II-L or Type II-P supernova.

High Energy Astrophysical Phenomena