Electronic Telegram No. 3625
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 2013eu IN UGC 5609 = PSN J10242231+7836235
     Giancarlo Cortini, Predappio, Italy, reports the discovery of a possible
supernova (mag about 15.6) on several unfiltered CCD images (limiting mag
about 19.0) taken on Aug. 11.88 UT with a 35-cm f/5.5 Schmidt-Cassegrain
reflector (+ SXVR-H9 camera).  The new object is located at R.A. =
10h24m22s.31, Decl. = +78d36'23".5 (equinox 2000.0), which is 3" west and 9"
south of the center of the galaxy UGC 5609.  Nothing is visible at this
position on Palomar Sky Survey red and blue plates.  The variable was
designated PSN J10242231+7836235 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2013eu based on the spectroscopic
confirmation reported below.  Additional unfiltered CCD magnitudes for
2013eu:  2013 June 3.90 and July 4.98, [19.0 (Cortini); Aug. 12.852, 15.4
(Riccardo Mancini and Fabio Briganti, Cerreto Guidi, Italy; 25-cm Newtonian
telescope).

     L. Tomasella, A. Pastorello, S. Benetti, E. Cappellaro, P. Ochner, and M.
Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica,
report that an optical spectrogram (range 340-820 nm; resolution 1.3 nm) of
PSN J10242231+7836235 = SN 2013eu, obtained on Aug. 12.82 UT with the Asiago
1.82-m Copernico Telescope (+ AFOSC), shows it to be normal type-Ia supernova.
Adopting for the host galaxy (UGC 5609) a recessional velocity of 2778 km/s
(Falco et al. 1999, PASP 111, 438; via NED), a good match is found with
several type-Ia supernovae at a few days before B-band maximum light.  An
expansion velocity of about 13000 km/s is derived from the minimum of the Si
II 635-nm line.  The Asiago classification spectra are posted at website URL
http://sngroup.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      superseded by text appearing later in the printed IAU Circulars.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 August 13                   (CBET 3625)              Daniel W. E. Green