2012CBET.3280....1M

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, P. Sanchez, C. Hervias, and R. Ramirez, Universidad de Chile; G. Pignata, M. Cifuentes, and Y. Apostolovski, Universidad Andres Bello; F. Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of the CHASE project (which is part of the Millennium Center for Supernova Science collaboration), report the discovery of an apparent supernova (mag approximately 17.5) on an unfiltered image taken on Aug. 27.25 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object, which was also visible at mag about 17.4 in a CHASE image from Aug. 28.32, is located at R.A. = 4:37:19.13 ± 0".2, Decl. = -69:08:25.4 ± 0".2 (equinox 2000.0), which is about 1".1 east and 8".2 north of center of the galaxy ESO 55-28. Nothing is visible at this position in a stack of twelve 40-s archival images taken between 2011 Sept. 11.21 and 2012 July 27.34 (limiting mag 20.2). The variable was designated PSN J04371913-6908254 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012fu based on the spectroscopic confirmation reported below.