Electronic Telegram No. 3360
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 2012ic IN PGC 12029
     Li Zhou, Junchen Cheng, and Xiaofeng Wang, Tsinghua University (THU),
China; and Tianmeng Zhang and Xu Zhou, National Astronomical Observatories of
China (NAOC), report the discovery of an apparent supernova (mag 17.4) on
unfiltered CCD images taken on Dec. 22.69 UT using the 0.6-m NAOC Schmidt
telescope in the course of the THU-NAOC Transient Survey.  The variable is
located at R.A. = 3h13m53s.71, Decl. = +33d58'03".7 (equinox 2000.0), which is
about 1".5 west and 4".0 north of the center of the presumed host galaxy, PGC
12029.  Nothing is visible at this position on archival images obtained
on Dec. 6 (limiting mag about 19.5) or on Digitized Sky Survey images from the
Palomar Sky Survey.  The new object was confirmed at mag about 17.1 on images
taken on Dec. 23.66 UT.

     Jujia Zhang and Yuxin Xin, Yunnan Astronimical Observatory (YNAO); Xulin
Zhao and Xiaofeng Wang, Tsinghua University; and Tianmeng Zhang, National
Astronomical Observatories of China, report on an optical spectrogram (range
340-850 nm) of 2012ic that was obtained on Dec. 23.66 UT with the 2.4-m
telescope (+ YFOSC) at the LiJiang Gaomeigu Station of the YNAO.  The spectrum
is consistent with a type-Ia supernova around the 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 this object matches with SN 2000dn at -4 days.  Adopting a recession
velocity 12261 km/s for the galaxy PGC 12029 (Wegner et al. 1993, A.J.,
105, 1251), they measure the velocity of the Si II 635.5-nm absorption
feature to be about 10400 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2012 CBAT
2012 December 26                 (CBET 3360)              Daniel W. E. Green