Electronic Telegram No. 3532
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 2013cr = PSN J16114647+4051222
     Tianmeng Zhang, National Astronomical Observatories of China (NAOC);
Xiaofeng Wang, Li Zhou, and Juncheng Chen, Tsinghua University (THU); and Xu
Zhou, NAOC, report the discovery of an apparent supernova (mag 17.5) on
unfiltered CCD images taken on May 14.75 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. = 16h11m46s.47, Decl. = +40d51'22".2 (equinox
2000.0), which is 2".0 west and 3".0 north of the galaxy 2MASX
J16114660+4051187.  Nothing is visible at this position on a Digitized Sky
Survey image.  Additional approximate TNTS magnitudes for the variable:  Mar.
24, [20.0; Apr. 28, 18.0; May 4, 17.4.  The TNTS images are posted at URL
http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ16114647+4051222.png.  The
variable was designated PSN J16114647+4051222 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013cr based on the
spectroscopic confirmation reported below.

     J. M. Silverman, University of Texas; J. Vinko, University of Szeged; R.
Quimby, Kavli IPMU, University of Tokyo; and J. C. Wheeler, University of
Texas, write that a spectrogram, obtained on May 16.45 UT with the 9.2-m
Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by S. Odewahn,
shows that PSN J16114647+4051222 = SN 2013cr is a type-II supernova.
Correlation with a library of supernova spectra using the "SuperNova
IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates
that 2013cr is a normal type-IIP supernova about 2 weeks after maximum
brightness.  After removal of the host-galaxy recession velocity of 7822 km/s
(from narrow emission lines), the absorption minimum of the H-alpha line is
found to be blueshifted by about 8900 km/s.  The authors also note that the
continuum is relatively blue and that the H-alpha emission component greatly
dominates over the absorption component.  In addition, the absolute magnitude
of 2013cr (about -17.8 mag) is somewhat more luminous than most normal S
type-IIP supernovae (e.g., Arcavi et al. 2012, Ap.J. 756, 30).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 May 18                      (CBET 3532)              Daniel W. E. Green