Electronic Telegram No. 3325
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 2012he IN MCG -06-12-2 = PSN J05005007-3839114
     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 18.2) on
unfiltered images taken on Nov. 22.32 and 23.18 UT with the 0.41-m 'PROMPT 1'
telescope located at Cerro Tololo.  The new object is located at R.A. =
5h00m50s.07 +/- 0".2, Decl. = -38o39'11".4 +/- 0".2 (equinox 2000.0), which is
about 7".1 west and 5".6 north of center of the galaxy MCG -06-12-2.  Nothing
is visible at this position on archival images taken on Nov. 1.31 (limiting
mag 18.5) or on a stack of twelve 40-s images taken between Jan. 4.10 and Nov.
1.31 (limiting mag 19.7).  The variable was designated PSN J05005007-3839114
when it was posted at the Central Bureau's TOCP webpage and is here designated
SN 2012he based on the spectroscopic confirmation reported below.

     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. 23.33 UT with the New Technology
Telescope (+ EFOSC2), showing that PSN J05005007-3839114 = SN 2012he is a
type-Ia supernova, 3-4 weeks after 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 3325)              Daniel W. E. Green