Electronic Telegram No. 3191
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 2012dv
     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; and S. M. Larson and E.
Christensen, Lunar and Planetary Laboratory, University of Arizona, report the
discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS)
images:

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012dv   July 18.41   21 48 30.29  -12 50 21.3   18.2    0".5 E, 1".6 N

Further CSS magnitudes for 2012dv:  May 28.45 UT, [19.4; June 18.40, 18.4.

     J. M. Silverman and A. V. Filippenko, University of California, Berkeley,
report that inspection of a low-signal-to-noise-ratio CCD spectrum (range
340-1000 nm), obtained on July 23 UT with the Shane 3-m reflector (+ Kast
spectrograph) at Lick Observatory, shows that 2012dv is a type-Ia supernova.
Cross-correlation with a library of SN spectra using the "SuperNova
IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates
that 2012dv is a normal type-Ia supernova approximately one month past maximum
brightness.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 July 24                     (CBET 3191)              Daniel W. E. Green