Electronic Telegram No. 3452
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 2013av
     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
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.      Offset
 2013av   Mar. 1.50   12 19 32.65  +38 02 25.9   17.7	 51".8 W, 21".2 S

Additional CSS magnitudes for 2013av:  Jan. 18.47 UT, [19.5; Feb. 23.29, 17.4.

     L. Tomasella, A. Pastorello, S. Benetti, E. Cappellaro, P. Ochner, and
M. Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di
Astrofisica, report that a noisy optical spectrogram (range 340-820 nm;
resolution 1.3 nm), obtained on Mar. 16.16 UT with the Asiago 1.82-m Copernico
Telescope (+ AFOSC), shows that 2013av is a type-Ia supernova at z about 0.05.
The best match was found with various type-Ia supernovae -- and, in particular,
with SN 1994D (Patat et al. 1996, MNRAS 278, 111) at about fifty days after
maximum light.  The Asiago classification spectra are posted at 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
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                         (C) Copyright 2013 CBAT
2013 April 2                     (CBET 3452)              Daniel W. E. Green