[IAUC] CBET 3949: 20140830 : SUPERNOVA 2014ck IN UGC 12182 = PSN J22453888+7309427

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3949
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 2014ck IN UGC 12182 = PSN J22453888+7309427
     Further to CBET 3855, K. Hayakawa, W. Zheng, and A. V. Filippenko,
University of California at Berkeley, report the LOSS discovery of an apparent
supernova in UGC 12182 on unfiltered KAIT images:

 SN       2014 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2014ck   June 29.47   22 45 38.88  +73 09 42.7   16.4    4".3 E, 0".5 S

A finding chart was posted by the discoverers at the following website URL:
http://astro.berkeley.edu/~zwk/findingchart/PSN_J22453888+73094273.jpg.
     SN 2006fp also appeared in UGC 12182 (cf. IAUC 8750, CBET 625).  The
variable was designated PSN J22453888+7309427 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014ck based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014ck:  June 24.5 UT, 17.0 (KAIT; marginal detection; approximate R-band
magnitude); 28.47, 16.4 (KAIT); 30.833, 16.1 (G. Masi; remotely using a
36-cm Schimdt-Cassegrain reflector at Ceccano, Italy; position end figures
38s.72, 43".2); July 1.381, 17.3 (J. Brimacombe, Cairns, Australia; remotely
using a 51-cm RCOS telescope + STXL-6303 camera at the New Mexico Skies
observatory near Mayhill, NM, U.S.A.; position end figures 38s.76, 43".4;
image posted at URL https://www.flickr.com/photos/43846774@N02/14369054400/);
1.907, 16.1 (N. James, Chelmsford, Essex, England; Celestron 11 telescope +
ST9XE camera; magnitude specified as R-band; position end figures 38s.75,
43".2; image accessible via website URL http://tinyurl.com/nuxw6rk).

     W. Zheng, I. Shivvers, K. I. Clubb, and A. V. Filippenko, University of
California, Berkeley; and R. J. Foley, University of Illinois, report that
inspection of a CCD spectrogram (range 350-1000 nm), obtained on June 30.455
UT with the Shane 3-m reflector (+ Kast spectrograph) at Lick Observatory,
shows that PSN J22453888+7309427 = SN 2014ck is a peculiar type-Ia supernova.
Cross-correlation with a library of supernova spectra using the "SuperNova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
indicates a similarity with the peculiar type-Ia supernovae 2005hk and 2002cx
about a week before maximum light.  The spectrum shows a blue continuum with
relatively weak and narrow Si II 635.5-nm absorption, but the Fe III lines at
430 and 500 nm are clearly present, suggesting that the object might be a
member of the type-Iax class of supernovae (Foley et al. 2013, Ap.J. 767, 57).

     L. Tomasella, P. Ochner, S. Benetti, A. Pastorello, E. Cappellaro, L.
Tartaglia, N. Elias-Rosa, and M. Turatto, Osservatorio Astronomico di Padova,
INAF, report that an optical spectrogram (range 340-820 nm; resolution 1.3 nm)
of PSN J22453888+7309427 = SN 2014ck, obtained on July 3.98 UT with the Asiago
1.82-m Copernico Telescope (+ AFOSC) under the Asiago Transient Classification
Program (Tomasella et al. 2014, as posted at http://arxiv.org/abs/1403.7233)
shows that this is a 2002cx-like type-Ia peculiar supernova resembling SN
2008ha (Valenti et al. 2009, Nature 459, 674) and SN 2010ae (Strinztinger et
al. 2014, A.Ap. 561, 146) around maximum light, after adopting for the host
galaxy (UGC 12182) a recessional velocity of 1490 km/s (Falco et al. 2000,
The Updated Zwicky Catalogue).  The Asiago classification spectrum is posted
at website URL http://sngroup.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
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 August 30                   (CBET 3949)              Daniel W. E. Green