Electronic Telegram No. 3355
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 2012hy IN NGC 4903 = PSN J13012341-3056292
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (magnitude 16.5) on unfiltered CCD images
taken on Nov. 11.100 UT with a 30-cm RCX400 telescope.  The new object is
located at R.A. = 13h01m23s.41, Decl. = -30d56'29".2 (equinox 2000.0), which
is 8" east and 24" south of the core of the SBc-type galaxy NGC 4903.  Nothing
is visible at this position in red Digitized Sky Survey images to limiting mag
20.5.  The variable was designated PSN J13012341-3056292 when it was posted at
the Central Bureau's TOCP webpage and is here designated SN 2012hy based on
the spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012hy:  Aug. 23.722, [18.5 (Monard); Nov. 14.079, 16.7 (Monard); 14.093, 16.6
(Monard); 15.093, 16.7 (Monard); 18.086, 17.0 (Monard); 20.089, 17.6 (Monard);
24.779, 18.8 (Joseph Brimacombe, Cairns, Australia; 41-cm RCOS telescope +
infrared filter; bandpass > 700 nm; position end figures 23s.38, 30".2; image
posted at website URL http://www.flickr.com/photos/43846774@N02/8215250233/);
26.086, 17.1 (Monard); 27.086, 17.4 (Monard); Dec. 12.075, 18.2 (Monard);
17.060, 18.6 (Monard).

     N. Morrell, Las Campanas Observatory, on behalf of the Carnegie Supernova
Project, reports on an optical spectrum (range 370-960 nm) of PSN
J13012341-3056292 = SN 2012hy, obtained on Dec. 22.35 UT with the Las Campanas
du Pont telescope (+ WFCCD), which shows that this is an evolved type-Ia
supernova.  Cross-correlation with a library of supernova spectra via the
Supernova Identification tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
indicates that 2012hy is a normal type-Ia supernova, more than two months
past maximum brightness -- the best match being to the spectrum of SN 1999gh
at 66 days after maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 December 25                 (CBET 3355)              Daniel W. E. Green