Electronic Telegram No. 3027
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 2012ag IN PGC 48454 = PSN J13412766-3200010
     R. H. McNaught, Australian National University; A. J. Drake, M. J.
Graham, S. G. Djorgovski, 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
 2012ag   Feb. 16.74   13 41 27.66  -32 00 01.0   16.6    8".1 E, 8".1 N

The variable was designated PSN J13412766-3200010 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012ag based on the
spectroscopic confirmation reported below.  Further magnitudes for 2012ag:
2011 Aug. 26.42 UT, [19.0 (SSS); 2012 Feb. 17.600, 16.2 (Joseph Brimacombe,
Cairns, Australia; 41-cm RCOS telescope + STL6K camera + infrared filter;
wavelength range > 700 nm; position end figures 27s.67, 01".0; image posted at
website URL http://www.flickr.com/photos/43846774@N02/6893811615/).

     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 J13412766-3200010 = 2012ag was obtained on Feb. 19 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 2012ag is a type-Ia
supernova more than three weeks after maximum light.  A good fit is found to
the template of the normal type-Ia supernova 2003cg at +24 days.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 February 20                 (CBET 3027)              Daniel W. E. Green