Electronic Telegram No. 3326 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2012hf IN NGC 3469 = PSN J10565746-1417378 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 17.2) on an unfiltered image taken on Nov. 22.32 UT with the 0.41-m 'PROMPT 5' telescope located at Cerro Tololo. The new object, which is also present at mag approximately 17.0 in an image taken on Nov. 23.31, is located at R.A. = 10h56m57s.46 +/- 0".2, Decl. = -14o17'37".8 +/- 0".2 (equinox 2000.0), which is about 3".5 west and 23".9 north of the center of the galaxy NGC 3469. Nothing is visible at this position on archival images taken on May 4.04 (limiting mag 18.0) or in a stack of eleven 40-s images taken between Feb. 25.22 and May 4.04 (limiting mag 19.5). The variable was designated PSN J10565746-1417378 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012hf based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012hf: Nov. 24.432, 16.5 (L. Elenin, Lyubertsy, Russia; and I. Molotov, Moscow, Russia; images taken remotely with a 0.45-m f/2.8 telescope at the ISON-NM Observatory near Mayhill, NM, USA; limiting mag about 19.1; position end figures 57s.43 +/- 0".08, 38".4 +/- 0".08; UCAC-4 reference stars; image posted at website URL http://spaceobs.org/images/TOCP/PSNJ10565746-1417378-20121124.png); 25.499, 17.8 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + luminance filter at the New Mexico Skies Observatory near Mayhill; position end figures 57s.49, 37".7; image posted at website URL http://www.flickr.com/photos/43846774@N02/8225320294/). G. Pignata and F. Bufano, Universidad Andres Bello; S. Gonzalez-Gaitan, S. Marchi, F. Forster, J. Anderson, and C. Gutierrez, Universidad de Chile; S. Taubenberger, Max-Planck-Institute fuer Astrophysik, Garching; S. Valenti, University of California at Santa Barbara and Las Cumbres Observatory Global Telescope; A. Pastorello and S. Benetti, Istituto Nazionale di Astrofisica, Padova Astronomical Observatory; S. J. Smartt, K. Smith, D. Young, and C. Inserra, Queen's University, Belfast; M. Sullivan, University of Southampton; and A. Gal-Yam and O. Yaron, Weizmann Institute for Science, on behalf of the PESSTO collaboration (cf. Valenti et al., as posted at website URL http://www.astronomerstelegram.org/?read=4037), report on optical spectroscopy (range 360-910 nm), obtained on Nov. 23.34 UT with the New Technology Telescope (+ EFOSC2), showing that PSN J10565746-1417378 = SN 2012hf is a type-Ic supernova about a week before maximum. PESSTO classification spectra can be obtained at website URL http://www.pessto.org/; classification is made via SNID (Blondin and Tonry 2007, Ap.J. 666, 1024) and GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2012 CBAT 2012 December 3 (CBET 3326) Daniel W. E. Green