[IAUC] CBET 3326: 20121203 : SUPERNOVA 2012hf IN NGC 3469 = PSN J10565746-1417378

Lun Dic 3 11:18:43 ART 2012

                                                  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 en eps.harvard.edu (alternate cbat en 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
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                         (C) Copyright 2012 CBAT
2012 December 3                  (CBET 3326)              Daniel W. E. Green