[IAUC] CBET 3616: 20130803 : SUPERNOVA 2013eq = PSN J17331573+3628352

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                                                  Electronic Telegram No. 3616
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2013eq = PSN J17331573+3628352
     H. Mikuz, Crni Vrh Observatory, reports the discovery of an apparent
supernova (mag 18.5) on four unfiltered CCD images (bandpass roughly
equivalent to the R band) taken on July 30.882-30.913 UT with the 60-cm f/3.3
Cichocki reflector in the course of the Comet and Asteroid Search Program
(PIKA).  The new object is located at R.A. = 17h33m15s.73, Decl. =
+36d28'35".2 (equinox 2000.0), which is approximately 6" east and 18" north of
the center of the apparent host galaxy.  Nothing is visible at this position
on archival PIKA images obtained on 2013 June 19 and 2011 Mar. 23 (limiting
R-band magnitudes about 19.5) or on several Digitized Sky Survey red and blue
images from the Palomar Sky Survey.  Mikuz has posted an image at website URL
http://www.observatorij.org/Data/PSN20130730/PSN20130730.jpg.  The variable
was designated PSN J17331573+3628352 when it was posted at the Central
Bureau's TOCP webpage and is here designated SN 2013eq based on the
spectroscopic confirmation reported below.  L. Elenin (Lyubertsy, Russia) and
I. Molotov (Moscow) write that unfiltered exposures (limiting mag about 20.2)
taken remotely with a 0.45-m telescope at the ISON-NM Observatory near Mayhill,
NM, USA, on Aug. 2.153 show 2013eq at mag 18.6 with position end figures
15s.72 +/- 0".09, 34".7 +/- 0".09; UCAC-4 reference stars; image posted at URL
http://spaceobs.org/images/TOCP/PSNJ17331573+3628352-20130802.png).

     L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, and M.
Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di
Astrofisica, report that optical spectra (range 340-820 nm; resolution 1.3 nm),
of PSN J17331573+3628352 = SN 2013eq, obtained on July 31.84 and Aug. 1.92 UT
with the Asiago 1.82-m Copernico Telescope (+ AFOSC), show a blue continuum
with broad P-Cyg lines of H-alpha, H-beta, and He I 587.6-nm, indicating that
the object is a type-II supernova shortly after explosion.  Adopting for the
host galaxy a redshift z = 0.042, as derived from the host-galaxy emission
lines, a best fit is found with the type-IIP supernova 1999gi (Leonard et al.
2002, A.J. 124, 2490) a few days after explosion.  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 August 3                    (CBET 3616)              Daniel W. E. Green