[IAUC] CBET 3394: 20130129 : SUPERNOVA 2013N = PSN J11500413+2116460

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                                                  Electronic Telegram No. 3394
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 2013N = PSN J11500413+2116460
     Li Zhou, Xiaofeng Wang, and Juncheng Chen, Tsinghua University (THU),
China; and Tianmeng Zhang and Xu Zhou, National Astronomical Observatories of
China (NAOC), report the discovery of an apparent supernova (mag 15.9) on
unfiltered CCD images taken on Jan. 26.79 UT using the 0.6-m NAOC Schmidt
telescope in the course of the THU-NAOC Transient Survey (TNTS).  The new
object is located at R.A. = 11h50m04s.13, Decl. = +21d16'46".0 (equinox
2000.0), which is about 2" east and 1" south of the center of the galaxy SDSS
J115004.06+211647.4.  Nothing is visible at this position on archival images
obtained on Jan. 12 (limiting mag about 20.0) or on a Digitized Sky Survey
image from the Palomar Sky Survey.  The TNTS image is posted at website URL
http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ1150413+2116460.png.  The
variable was designated PSN J11500413+2116460 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013N based on the
spectroscopic confirmation reported below.

     Jujia Zhang and Changjun Wang, Yunnan Astronomical Observatory (YNAO);
Jinghua Gao and Xiaofeng Wang, Tsinghua University; and Tianmeng Zhang,
National Astronomical Observatories of China, report on an optical spectrogram
(range 330-860 nm) that was obtained on Jan. 27.89 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 maximum light.  Cross-correlation
with a library of supernova spectra using the "Supernova Identification" code
(Blondin and Tonry 2007, Ap.J. 666, 1024) shows that PSN J11500413+2116460 =
SN 2013N matches with SN 1999aa at -2 days.  Adopting a redshift of 0.026
(from the Sloan Digital Sky Survey) for the presumed host galaxy (SDSS
J115004.06+211647.4), they measure the velocity of the Si II 635.5-nm
absorption feature to be about 8700 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 29                  (CBET 3394)              Daniel W. E. Green