Electronic Telegram No. 3763
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 2013ho IN MCG +8-15-39 = PSN J08065902+4608116
     Denis Denisenko, Sternberg Astronomical Institute, reports the discovery
of an apparent supernova (mag 17.4) on 60-s unfiltered survey images (limiting
magnitude 19.5) obtained on Nov. 1.809-1.811 UT with the 0.4-m MASTER-Tunka
robotic telescopes.  The new object is located at R.A. = 8h06m59s.02, Decl. =
+46o08'11".6 (J2000.0), which is 8".7 east and 10".4 south of the center of
the galaxy MCG +8-15-39 = PGC 22774.  Denisenko, E. Gorbovskoy, and V. Lipunov
add that nothing is visible at this position on a MASTER-Tunka image taken on
2012 Jan. 27.6565 (limiting magnitude 20.0).  The discovery and reference
images are posted at http://master.sai.msu.ru/static/OT/080659.02+460811.6.jpg.
The variable was designated PSN J08065902+4608116 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013ho based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2013ho:  2013 Nov. 2.372, 18.8 (R. A. Koff, Bennett, CO, USA; 0.25-m f/10
Schmidt-Cassegrain reflector; position end figures 59s.02, 11".3; UCAC3
reference stars; limiting magnitude 19.9; image posted at website URL
http://antelopehillsobservatory.org/SNpictures/PSNJ08065902+4608116final.jpg);
3.398, 19.2 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS
telescope + STXL-6303 camera at the New Mexico Skies observatory near Mayhill,
NM, USA; position end figures 59s.04, 11".3; image posted at website URL
http://www.flickr.com/photos/43846774@N02/10705343245/); 6.025, 18.2 (Gianluca
Masi, Francesca Nocentini, and Patrick Schmeer; remotely using a 36-cm
telescope near Ceccano, Italy; position end figures 59s.06, 11".0); 12.162,
18.6 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.36-m f/7.1 reflector;
position end figures 59s.02, 11".0; reference stars from CMC-14 catalogue;
image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_P22774.jpg).

     L. Tomasella, M. Turatto, A. Pastorello, P. Ochner, S. Benetti, E.
Cappellaro, and N. Elias-Rosa, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica, report that an optical spectrogram (range 340-820
nm; resolution 1.3 nm) of PSN J08065902+4608116 = SN 2013ho, obtained on Dec.
12.90 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC), shows that it
is a type-Ib/c supernova.  Adopting a redshift z = 0.03378 for the host galaxy
(MCG +8-15-39; cf. Mould et al. 2000, Ap.J. 529, 786; via NED), a good match
is found with the type-Ib/c supernova 1990U (Matheson et al. 2001, A.J. 121,
1648) about two months after the explosions.  The Asiago classification
spectra are posted at website URL http://sngroup.oapd.inaf.it.  The
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 December 19                 (CBET 3763)              Daniel W. E. Green