2011CBET.2816....1P

G. Pignata and M. Cifuentes, Universidad Andres Bello; J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, P. Sanchez, C. Hervias, D. Iturra, and R. Ramirez, Universidad de Chile; C. Farias, 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 16.9) on an unfiltered CCD image taken on Sept. 1.11 UT with the 0.41-m 'PROMPT 5' telescope located at Cerro Tololo. The new object, which is also present at mag approximately 16.8 on an image taken on Sept. 2.98, is located at R.A. = 20:30:15.88 ± 0".2, Decl. = -34:48:32.5 ± 0".2 (equinox 2000.0), which is about 6".6 east and 10".7 north of center of the galaxy ESO 400-33. Nothing is visible at this position on archival images taken on July 22.23 (limiting mag 18.5) and Aug. 11.17 (limiting mag 18.0). The new object was designated PSN J20301588-3448325 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011fo based on the spectroscopic report below.