[IAUC] CBET 3319: 20121201 : SUPERNOVA 2012ha

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3319
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 2012ha
     F. V. Ferrante, Southern Methodist University; J. M. Silverman,
University of Texas; J. Vinko, University of Szeged; G. Dhungana, Southern
Methodist University; R. Quimby, Kavli IPMU, University of Tokyo; W. Zheng,
University of California at Berkeley; A. Romadan and C. Akerlof, University of
Michigan; F. Yuan, Australian National University; J. C. Wheeler and E.
Chatzopoulos, University of Texas; R. Kehoe, Southern Methodist University;
and G. H. Marion, Harvard-Smithsonian Center for Astrophysics, on behalf of
the ROTSE collaboration, report the discovery of a new supernova (mag about
16.0) in unfiltered images taken on Nov. 20.49 UT with the 0.45-m ROTSE-IIIb
telescope at McDonald Observatory.  The transient was observed again at
similar brightness on Nov. 22 and 24 (with large photometric uncertainties).
The new object is located at R.A. = 13h00m36s.10, Decl. = +27o34'24."6 (equinox
2000.0; uncertainty about 1"), which is 6".3 east and 2".6 south of the core
of the proposed host galaxy (2MFGC 10318 in the Virgo Cluster, whose SDSS
spectroscopic redshift is z = 0.01700 +/- 0.00001); a finding chart is posted
at URL http://www.rotse.net/rsvp/j130036.1+273425/ROTSE3_J130036.1+273425.jpg.
     A spectrogram, obtained on Nov. 29.51 UT with the 9.2-m Hobby-Eberly
Telescope (+ Marcario Low-Resolution Spectrograph) by S. Odewahn, shows that
2012ha is a type-Ia supernova.  Cross-correlation with a library of supernova
spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024) indicates that 2012ha is a normal type-Ia supernova
about one month after maximum brightness.


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                         (C) Copyright 2012 CBAT
2012 December 1                  (CBET 3319)              Daniel W. E. Green