The fast, luminous ultraviolet transient AT2018cow: extreme supernova, or disruption of a star by an intermediate-mass black hole?

Perley, Daniel A. and Mazzali, Paolo A. and Yan, Lin and Cenko, S. Bradley and Gezari, Suvi and Taggart, Kirsty and Blagorodnova, Nadia and Fremling, Christoffer and Mockler, Brenna and Singh, Avinash and Tominaga, Nozomu and Tanaka, Masaomi and Watson, Alan M. and Ahumada, Tomás and Anupama, G. C. and Ashall, Chris and Becerra, Rosa L. and Bersier, David and Bhalerao, Varun and Bloom, Joshua S. and Butler, Nathaniel R. and Copperwheat, Chris and Coughlin, Michael W. and De, Kishalay and Drake, Andrew J. and Duev, Dmitry A. and Frederick, Sara and González, J. Jesús and Goobar, Ariel and Heida, Marianne and Ho, Anna Y. Q. and Horst, John and Hung, Tiara and Itoh, Ryosuke and Jencson, Jacob E. and Kasliwal, Mansi M. and Kawai, Nobuyuki and Khanam, Tanazza and Kulkarni, Shrinivas R. and Kumar, Brajesh and Kumar, Harsh and Kutyrev, Alexander S. and Lee, William H. and Maeda, Keiichi and Mahabal, Ashish and Murata, Katsuhiro L. and Neill, James D. and Ngeow, Chow-Choong and Penprase, Bryan and Pian, Elena and Quimby, Robert and Ramirez-Ruiz, Enrico and Richer, Michael G. and Román-Zúñiga, Carlos G. and Sahu, D. K. and Srivastav, Shubham and Socia, Quentin and Sollerman, Jesper and Tachibana, Yutaro and Taddia, Francesco and Tinyanont, Samaporn and Troja, Eleonora and Ward, Charlotte and Wee, Jerrick and Yu, Po-Chieh

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