[IAUC] CBET 4056: 20150125 : SUPERNOVA 2014ec IN UGC 6109 = PSN J11023520+5035094

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                                                  Electronic Telegram No. 4056
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)
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2014ec IN UGC 6109 = PSN J11023520+5035094
     F. Ciabattari, E. Mazzoni, and M. Rossi, Borgo a Mozzano, Italy; and P.
Campaner, Ponte di Piave, Italy, report the discovery of an apparent supernova
(mag 17.2) on unfiltered CCD images (limiting magnitude 19.5) obtained on 2014
Nov. 20.17 UT with a 0.5-m Newtonian telescope (+ FLI 4710 Proline camera) and
on Nov. 22.08 with a 0.4-m Newtonian telescope (+ Atik 428ex camera).  The new
object is located at R.A. = 11h02m35s.20, Decl. = +50d35'09".4 (equinox
2000.0; astrometry with respect to USNO-B1 stars), which is 2" east and 13"
north of the center of the galaxy UGC 6109.  Nothing is visible at this
position on digitized plates of the Palomar Sky Survey from 1995 Mar. 26 (F
plate, limiting magnitude 20.3) and 1996 May 8 (J plate, limiting mag 20.3).
The variable was designated PSN J11023520+5035094 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014ec based on the
spectroscopic confirmation reported below.  G. Masi and P. Catalano obtained
unfiltered follow-up exposures on Nov. 24.991 UT with a 43-cm telescope at
Ceccano, Italy, that show 2014ec at mag 17.2 with position end figures 35s.21,
09".8.
     Tomoki Morokuma, Institute of Astronomy, University of Tokyo; Nozomu
Tominaga, Emiko Matsumoto, and Takumi Shibata, Konan University; Masaomi
Tanaka, National Astronomical Observatory of Japan; Katsuhiko Mameta,
Hyogo, Japan; Masanori Takeishi, Hokkaido, Japan; on behalf of the Kiso
Supernova Survey (KISS) collaboration, report the independent discovery of
PSN J11023520+5035094 = SN 2014ec at mag 17.3 on a g-band CCD image (limiting
mag 20.8) taken on Nov. 23.73 UT with the Kiso Wide Field Camera (KWFC;
field-of-view 2.1 deg x 2.1 deg) mounted on the 1.05-m Kiso Schmidt telescope
at the Kiso Observatory.  The new object is located at R.A. = 11h02m35s.18,
Decl. = +50d35'10".2 (equinox 2000.0), which is 2".5 east and 14".0 north of
the center of the galaxy UGC 6109.

     P. Ochner, S. Benetti, A. Pastorello, L. Tomasella, E. Cappellaro, N.
Elias-Rosa, L. Tartaglia, G. Terreran, and M. Turatto, Osservatorio
Astronomico di Padova, INAF, report that an optical spectrogram (range 340-820
nm; resolution 1.2 nm) of PSN J11023520+5035094 = SN 2014ec, obtained on 2014
Nov. 24.97 UT with the Asiago 182-cm Copernico Telescope (+ AFOSC) in the
framework of the Asiago Transient Classification Program (Tomasella et al.
2014, AN 335, 841), shows that this a type-II supernova.  A good match is
found with several type-II supernovae at about ten days after explosion, if a
redshift of 0.0223 is assumed for the host galaxy, UGC 6109 (from Falco et al.
1999, PASP 111, 438; via NED).  UGC 6109 already hosted the type-IIn supernova
2007rt (cf. Li 2007, CBET 1148; Trundle et al. 2009, A.Ap. 504, 945).
Classification was 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.

     Tomoki Morokuma, Mitsuru Kokubo, Kazuma Mitsuda, Yasuhito Hashiba, Mamoru
Doi, Shigeyuki Sako, Yuki Kikuchi, Hidenori Takahashi, and Ken Tateuchi,
University of Tokyo, Japan; Hanindyo Kuncarayakti, Millennium Institute of
Astrophysics, Chile; Makoto Watanabe and Hikaru Nakao, Hokkaido University;
and Yoichi Itoh, Kumiko Morihana, Satoshi Honda, Yuhei Takagi, and Jun
Takahashi, University of Hyogo, report that a low-resolution optical
spectrogram (range 400-1000 nm) of PSN J11023520+5035094 = SN 2014ec was
obtained on 2014 Nov. 26.82 UT with the Line Imager and Slit Spectrograph
(Hashiba et al. 2014, SPIE 9147, 2) on the 2.0-m Nayuta telescope at the
Nishi-Harima Observatory.  Cross-correlation with a library of supernova
spectra via the SNID code (Blondin and Tonry 2007, ApJ. 666, 1024) shows a
best fit with several type-II supernovae at z = 0.022 after maximum light,
with a broad H-alpha emission feature present.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2015 CBAT
2015 January 25                  (CBET 4056)              Daniel W. E. Green