Electronic Telegram No. 3515
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 2013ce IN PGC 35860 = PSN J11355080+3417027
     An apparent supernova (mag 17.3) was discovered by P. Balanutsa on two
60-s unfiltered CCD images obtained with the MASTER-Kislovodsk telescope (a
double 0.40-m f/2.5 reflector) on May 1.753 and 1.787 UT.  The new object is
located at R.A. = 11h35m50s.80, Decl. = +34d17'02".7 (equinox 2000.0), which
is 4" west and 7" north of the center of PGC 35860.  Discovery and reference
images are posted at http://master.sai.msu.ru/static/OT/113550.80341702.7.png.
The variable was designated PSN J11355080+3417027 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013ce based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2013ce (the pre-discovery images from the MASTER-Kislovodsk were found by D.
Denisenko):  Feb. 11.896, [19.2; Feb. 23.642, [17.5 (the latest non-detection
by MASTER-Amur, via Denisenko); Mar. 6.921, 16.7; Mar. 30.893, 17.0; May
4.888, R = 17.5 (K. Sarneczky, Konkoly Observatory, Piszkesteto, Hungary;
0.40-m Lendulet reflector; position end figures 50s.83, 02".5); 5.172, 18.3
(R. A. Koff, Bennett, CO, U.S.A.; Meade 0.25-m f/10 reflector + Apogee U-47
camera; limiting mag 20.6; position end figures 50s.79, 01".9; image posted at
http://antelopehillsobservatory.org/SNpictures/PSNJ11355080+3417027final.jpg);
5.304, 17.2 (Joseph Brimacombe, Cairns, Australia; remotely with a 51-cm RCOS
telescope + luminance filter located at the New Mexico Skies observatory near
Mayhill, NM, U.S.A.; position end figures 50s.87, 01".9; image posted at
website URL http://www.flickr.com/photos/43846774@N02/8712437390/).

     L. Tomasella, A. Pastorello, P. Ochner, S. Benetti, E. Cappellaro, and M.
Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica,
report that a spectrogram of PSN J11355080+3417027 = 2013ce, obtained on May
4.82 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm;
resolution 1.3 nm), suggests that this is a type-II supernova.  Together with
Balmer lines showing P-Cyg profiles, lines of Fe II, Sc II, and the Na I
doublet are also detected.  Superimposed to the broad supernova features,
narrow emission lines of H and [O III] are also detected.  From them, they
derive a redshift z = 0.021 for the host galaxy, PGC 35860 (in agreement with
the redshift of 0.021081 from SDSS Release 5, 2006; via NED).  The best fit
to the supernova spectral features is obtained with a spectrum of the
type-IIP supernova 1999gi (Leonard et al. 2002, A.J. 124, 2490) about one
month 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
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 May 11                      (CBET 3515)              Daniel W. E. Green