Electronic Telegram No. 2900

Central Bureau for Astronomical Telegrams
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138,
U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html

SUPERNOVA 2011hu IN PGC 19254 = PSN J06334085-3416267
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, Y. Apostolovski, and M. Vidal, Universidad Andres Bello; C. Farias and 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 17.4) on an unfiltered image taken on Nov. 6.29 UT with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo. The new object is located at R.A. = 6h33m40s.85 +/- 0".2, Decl. = -34°16'26".7 +/- 0".2 (equinox 2000.0), which is about 8".7 west and 8".9 south of center of the galaxy PGC 19254 = ESO 365-29. The variable was designated PSN J06334085-3416267 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011hu based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011hu: 2010 Mar. 11.15, [18.5 (CHASE); 2011 Oct. 22.28, [18.0 (CHASE); Nov. 8.18, 17.2 (CHASE); 13.583, 17.8 (J. Brimacombe, Cairns, Australia; infrared filter, wavelength > 700 nm; position end figures 40s.96, 26".8; image posted at http://www.flickr.com/photos/43846774@N02/6341667615/).

J. Anderson and T. De Jaeger, Universidad de Chile; and G. Pignata, Universidad de Andres Bello, on behalf of the Millennium Center for Supernova Science, report on optical spectroscopy (range 390-910 nm) of PSN J06334085-3416267 = SN 2011hu that was obtained on Nov. 15.3 UT with the Magellan II Clay 6.5-m telescope (+ LDSS3) at Las Campanas Observatory. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) gives best matches with the peculiar type-Ia supernova 1991bg, a few weeks past maximum.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars.

2011 November 18
(C) Copyright 2010 CBAT
(CBET 2904)
Daniel W. E. Green