Supernova 2014ec in UGC 6109 = Psn J11023520+5035094
Abstract
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.
- Publication:
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Central Bureau Electronic Telegrams
- Pub Date:
- January 2015
- Bibcode:
- 2015CBET.4056....2M