[IAUC] CBET 2980: 20120119 : SUPERNOVA 2012D IN PGC 44486 = PSN J12583711+2710252

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                                                  Electronic Telegram No. 2980
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 2012D IN PGC 44486 = PSN J12583711+2710252
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology;
J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad
Catolica de Chile; R. H. McNaught and G. Garradd, Australian National
University; 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 public images from the Catalina Sky
Survey (CSS):

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012D    Jan. 13.47   12 58 37.11  +27 10 25.2   18.0    2".3 W, 10".6 S

The variable was designated PSN J12583711+2710252 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012D based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012D (unfiltered unless noted otherwise):  2011 June 12.26 UT, [19.5 (CSS);
2012 Jan. 14.464, 18.4 (Joseph Brimacombe, Cairns, Australia; remotely using a
51-cm RCOS telescope + STL11K camera + luminance filter at New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; position end figures 37s.13, 25".1;
image posted at URL http://www.flickr.com/photos/43846774@N02/6696484729/);
14.331, 17.6 (L. Elenin, Lyubertsy, Russia; three stacked 300-s images taken
remotely at the ISON-NM Observatory near Mayhill with a 0.45-m f/2.8
telescope + KAF09000 CCD; position end figures 37s.20, 25".9, uncertainty
stated as +/- 0".1; UCAC3 reference stars; limiting mag about 19.9); 16.150,
18.9 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.38-m f/6.8 reflector;
position end figures 37s.16, 25".8; reference stars from CMC-14 catalogue;
image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_P44486.jpg).

     L. Magill, R. Kotak, and D. Wright, Queen's University, Belfast, report
that optical spectra (320-990 nm) of PSN J12583711+2710252 = SN 2012D were
obtained at the Isaac Newton Telescope (+ IDS) on Jan. 16.200 UT.  The spectra
were cross-correlated with a library of supernova spectra using the Supernova
Identification tool (SNID; Blondin and Tonry, 2007, Ap.J. 666, 1024) and
yielded the following results:  2012D shows broad P-Cyg emission profiles in
the Balmer lines and is best matched with the spectra of young type-II-P
supernovae such as 1999em, 2004et, and 2006bp at epochs of 2-7 days.


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

                         (C) Copyright 2012 CBAT
2012 January 19                  (CBET 2980)              Daniel W. E. Green