Electronic Telegram No. 3892
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2014bi IN NGC 4096 = PSN J12060299+4729335
     Further to CBET 3855, S. Kumar, W. Zheng, and A. V. Filippenko,
University of California at Berkeley, report the LOSS discovery of a possible
supernova on unfiltered KAIT images:

 SN       2014 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2014bi   May 31.25   12 06 02.99  +47 29 33.5   18.2    18".6 E, 51".2 N

The offset above is from the center of NGC 4096.  A finding chart was posted
at URL http://astro.berkeley.edu/~zwk/findingchart/PSN_J12060299+47293347.jpg.
The variable was designated PSN J12060299+4729335 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014bi based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014bi:  May 13 UT, [18.6 (KAIT); 21, 18.5 (KAIT; marginal detection); 27,
18.2 (KAIT); 31.973, 18.5 (G. Masi; remotely using a 43-cm telescope at
Ceccano, Italy; position end figures 02s.97, 33".0).

     J.-j. Zhang, Yunnan Observatories (YNAO); and X.-f. Wang, Tsinghua
University, report on an optical spectrogram (range 340-890 nm) of PSN
J12060299+4729335 = SN 2014bi that was obtained on May 31.66 UT with the 2.4-m
telescope (+ YFOSC) at the LiJiang Gaomeigu Station of YNAO.  The spectrum is
very red and consistent with a low-luminosity type-II-P supernova at about two
weeks after maximum light.  Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024) shows that 2014bi matches with SN 2005cs at +13 days.
Adopting a redshift of 0.00188 for the host galaxy (NGC 4096; Cappellari 2011,
MNRAS 413, 813), they measure an H-alpha P-Cyg absorption minimum velocity of
about 6200 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 June 13                     (CBET 3892)              Daniel W. E. Green