Electronic Telegram No. 3369
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 2012ii = PSN J07165548+5145476
     Li Zhou, Juncheng Chen and Xiaofeng Wang, Tsinghua University (THU);
and Tianmeng Zhang and Xu Zhou, National Astronomical Observatories of China
(NAOC), report the discovery of an apparent supernova (mag 19.0) on unfiltered
CCD images taken on 2012 Dec. 23.81 UT using the 0.6-m NAOC Schmidt telescope
in the course of THU-NAOC Transient Survey (TNTS).  The new object is located
at RA = 7h16m55s.48, Decl. = +51d45'47".6 (equinox 2000.0), which is about
0".4 east and 11".6 north of the center of the galaxy 2MASX J07165535+5145361.
Nothing is visible at this position on archival images obtained on Dec. 7
(limiting mag about 20.0) or on Digitized Sky Survey images (no details
provided on the noted Palomar Sky Survey plates).  TNTS images are posted at
URL http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ07165548+5145476.png.
The variable was designated PSN J07165548+5145476 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012ii based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012ii:  2012 Dec. 29.257, 17.5 (Joseph Brimacombe, Cairns, Australia;
remotely with a 51-cm RCOS telescope + infrared filter at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; bandpass > 700 nm; position end figures
55s.45, 47".9); 2013 Jan. 4.885, R_c = 18.3 (Massimiliano Martignoni, Magnago,
Italy; 0.25-m reflector; position end figurs 55s.48, 46".0).  Brimacombe's
image is posted at URL http://www.flickr.com/photos/43846774@N02/8325566294/.

     Jujia Zhang and Weimin Yi, 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) that was obtained on 2013 Jan. 1.89 UT with the 2.4-m telescope
(+ YFOSC) at the YNAO's LiJiang Gaomeigu Station.  The spectrum is consistent
with a couple of normal type-Ia supernova at a few days 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 2012ii matches well with SN 2003du at +8 days.  Adopting a redshift of
0.06 (from the SNID fit) for the host galaxy (2MASX J07165535+5145361), they
measure the velocity of the Si II 635.5-nm absorption feature to be about
10300 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 January 5                   (CBET 3369)              Daniel W. E. Green