[IAUC] CBET 3322: 20121203 : SUPERNOVA 2012hb IN ESO 90-15 = PSN J09020546-6454197

Dom Dic 2 21:39:04 ART 2012

                                                  Electronic Telegram No. 3322
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)
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2012hb IN ESO 90-15 = PSN J09020546-6454197
     G. Pignata, M. Cifuentes, and Y. Apostolovski, Universidad Andres Bello;
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; 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 Nov. 4.33 UT with the 0.41-m 'PROMPT 4' telescope
located at Cerro Tololo.  The new object is located at R.A. = 9h02m05s.46 +/-
0".2, Decl. = -64o54'19".7 +/- 0".2 (equinox 2000.0), which is about 1".0 west
and 4".6 south of the center of the galaxy ESO 90-15.  Nothing is visible at
this position on archival images taken on Apr. 7.03 (limiting mag 18.5) or
in a stack of eighteen 40-sec images taken between 2011 Nov. 1.30 and 2012
Apr. 7.03 (limiting mag 20.4).  The variable was designated PSN
J09020546-6454197 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2012hb based on the spectroscopic confirmation
reported below.  Joseph Brimacombe, Cairns, Australia, reports position end
figures 05s.44, 20".3 from exposures taken with 41-cm RCOS telescope (+
infrared filter on Nov. 15.748; his image is posted at the following website
URL:  http://www.flickr.com/photos/43846774@N02/8198232937/.

     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. 7.25 UT with the New Technology Telescope
(+ EFOSC2), showing PSN J09020546-6454197 = SN 2012hb to be a type-II
supernova at two months post-explosion.  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).


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                         (C) Copyright 2012 CBAT
2012 December 3                  (CBET 3322)              Daniel W. E. Green