Electronic Telegram No. 4190
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2015ap IN IC 1776 = PSN J02051332+0606084
     Further to CBET 4124, T. Ross, W. Zheng, and A. V. Filippenko, University
of California at Berkeley, report the LOSS discovery of an apparent supernova
in IC 1776 in unfiltered KAIT images:

 SN       2015 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2015ap   Sept. 8.469   2 05 13.32  + 6 06 08.4   17.3    28".7 W, 16".4 S

A finding chart was posted by the discoverers at the following website URL:
http://w.astro.berkeley.edu/~zwk/findingchart/PSN_J02051332+06060842.jpg.
The variable was designated PSN J02051332+0606084 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2015ap based on the
spectroscopic confirmation reported below.  Additional approximate red CCD
magnitudes for 2015ap:  Sept. 7.47 UT, 18.0 (KAIT); 9.47, 17.0 (KAIT);
11.906, 16.0 (G. Masi; remotely using a 43-cm telescope at Ceccano, Italy;
position end figures 13s.30, 08".5.

     L. Tartaglia, N. Elias-Rosa, S. Benetti, E. Cappellaro, L. Tomasella,
P. Ochner, A. Pastorello, G. Terreran, and M. Turatto, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica, report that an
optical spectrogram (range 340-820 nm; resolution 1.4 nm) of PSN
J02051332+0606084 = SN 2015ap, obtained on Sept. 11.04 UT with the Asiago
182-cm Copernico Telescope (+ AFOSC) in the framework of the Asiago Transient
Classification Program (Tomasella et al. 2014, A.N. 335, 841), shows that
this a type-Ib/c supernova.  Adopting for the host galaxy (IC 1776) a
redshift z = 0.01138 from Chengalur et al. (1993, Ap.J. 419, 30; via NED),
the spectrum is similar to those of several broad-line type-Ib/c supernovae
before or close to maximum.  Classifications were done with GELATO
(Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007,
Ap.J. 666, 1024).  The Asiago classification spectra are posted at website
URL http://sngroup.oapd.inaf.it.

     I. Shivvers, H. Yuk, and A. V. Filippenko, University of California at
Berkeley, write that PSN J02051332+0606084 = SN 2015ap is a normal type-Ib
supernova.  The object was reported by Tartaglia et al. (above) as a type-Ib/c
supernova based on a very young spectrum showing a similarity to the spectra
of young broad-lined type-Ib/c supernovae.  Based upon a spectrum (range
330-1000 nm) obtained on Sept. 21 UT with the 3-m Shane reflector (+ Kast) at
Lick Observatory, this object has evolved into a normal type-Ib supernova.
The "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) identifies strong correlations with SNe 1997X, 2007C, and 1998dt around
maximum brightness.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2015 CBAT
2015 November 19                 (CBET 4190)              Daniel W. E. Green