[IAUC] CBET 3108: 20120516 : SUPERNOVA 2012ce = PSN J11134946-2955320

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                                                  Electronic Telegram No. 3108
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 2012ce = PSN J11134946-2955320
     R. H. McNaught, Australian National University; A. J. Drake, S. G.
Djorgovski, M. J. Graham, A. Mahabal, and R. Williams, California Institute of
Technology; J. L. Prieto, Princeton University; M. Catelan, Pontificia
Universidad Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and
Planetary Laboratory, University of Arizona; and E. Christensen, Gemini
Observatory, report the discovery of an apparent supernova in unfiltered
Siding Spring Survey (SSS) images:

 SN       2012 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2012ce   May 14.49   11 13 49.46  -29 55 32.0   16.6    7".0 E, 2".2 S

The variable was designated PSN J11134946-2955320 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012ce based on the
spectroscopic confirmation reported below.  Further CCD magnitudes for 2012ce:
Mar. 31.63 UT, [18.8 (SSS); May 15.398, 18.5 (J. Brimacombe, Cairns, Australia;
infrared filter; position end figures 49s.51, 32".9; image posted at website
URL http://www.flickr.com/photos/43846774@N02/7207002078/).

     G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on
behalf of the CfA Supernova Group, reports that a spectrum (range 340-740 nm)
of PSN J11134946-2955320 = 2012ce was obtained on May 15 UT by J. Irwin with
the F. L. Whipple Observatory 1.5-m telescope (+ FAST).  Cross-correlation
with a library of supernova spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2012ce is a type-Ia
supernova about one week after maximum light.  A good fit is found to the
template of the normal type-Ia supernova 1995D at +6 days.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 May 16                      (CBET 3108)              Daniel W. E. Green