Electronic Telegram No. 3441
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 2013an
     A. J. Drake, S. G. Djorgovski, M. J. Graham, A. A. Mahabal, and R.
Williams, California Institute of Technology; J. L. Prieto, Princeton
University; M. Catelan, Pontificia Universidad Catolica de Chile; and E.
Christensen and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona, report the Catalina Real-time Transient Survey discovery of an
apparent supernova in unfiltered Catalina Sky Survey (CSS) images:

   SN       2013 UT        R.A. (2000.0) Decl.      Mag.
   2013an   Feb. 5.45   12 49 54.21  + 6 20 40.6    18.2

Additional CSS magnitudes for 2013an:  Jan. 19.51 UT, [19.7; Mar. 5.37, 18.7.

     A. Pastorello, L. Tartaglia, S. Benetti, E. Cappellaro, P. Ochner, L.
Tomasella, and M. Turatto, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica; and N. Blagorodnova, Institute of Astronomy,
University of Cambridge, report that low-signal-to-noise optical spectroscopy
(range 370-820 nm; resolution 1.4 nm) of 2013an, obtained on Feb. 9.19 UT with
the Asiago 1.82-m Copernico Telescope (+ AFOSC), indicates that it was a very
young type-II supernova.  A blue, almost featureless continuum is seen.  The
only feature clearly detected is identified with a relatively broad H-alpha.
From the position of the H_alpha line peak, a redshift z of about 0.014 is
derived for the parent galaxy.  The Asiago classification spectra are posted
at the website URL http://graspa.oapd.inaf.it.  Classification was made via
GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry
2007, Ap.J. 666, 1024).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 March 24                    (CBET 3441)              Daniel W. E. Green