Electronic Telegram No. 3493
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 2013br
     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; S. M. Larson and E.
Christensen, Lunar and Planetary Laboratory, University of Arizona; and R. H.
McNaught, Australian National University, report the Catalina Real-time
Transient Survey discovery of an apparent supernova in unfiltered CCD images:

 SN       2013 UT         R.A. (2000.0) Decl.      Mag.      Offset
 2013br   Apr. 14.22   11 21 30.88  - 3 31 02.8    18.2      1" N

     N. Morrell and E. Hsiao, Las Campanas Observatory, on behalf of the
Carnegie Supernova Project, report optical spectroscopy (range 370-960 nm) of
2013br obtained on Apr. 16 UT with the Las Campanas 2.5-m du Pont telescope (+
WFCCD).  Inspection of the data reveals that 2013br is a young type-II
supernova.  Cross-correlation with a library of supernova spectra via the
Supernova Identification tool (SNID, Blondin and Tonry 2007, Ap.J., 666, 1024)
yields best matches with SN 1998S at +11 days for 2013br.  Strong nebular
emission from surrounding H II regions is present in the supernova spectra,
allowing determination of a redshift of 0.074 +/- 0.002 for 2013br.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 April 24                    (CBET 3493)              Daniel W. E. Green