Electronic Telegram No. 3438
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 2013al
       Masaomi Tanaka, National Astronomical Observatory of Japan; Kensho
Mori, Konan University; Michael W. Richmond, Rochester Institute of
Technology; Yoshihiko Saito, Tokyo Institute of Technology; Satoru Fukuda,
Hyogo, Japan; Katsuhiko Mameta, Hyogo, Japan; Tomoki Morokuma, Institute of
Astronomy, University of Tokyo; and Nozomu Tominaga, Konan University, on
behalf of the Kiso Supernova Survey (KISS) collaboration, report the
discovery of an apparent supernova (mag 19.2) on a g-band CCD image
(limiting mag 20.0) taken on Mar. 3.43 UT with the Kiso Wide Field Camera
(field-of-view 2.1 deg x 2.1 deg) on the 1.05-m Kiso Schmidt telescope at the
Kiso Observatory.  The new object is located at R.A. = 11h14m54s.07, Decl. =
+29d35'06".0 (equinox 2000.0), which is about 3" south of the host galaxy
(SDSS J111454.06+293508.6; photometric redshift about 0.1, from the Sloan
Digital Sky Survey database).  Nothing is seen at this position in an image
taken on Feb. 6.67 (limiting mag 20.8).  This object is also detected with
the WIYN 0.9-m telescope at Kitt Peak at magnitudes V = 19.4, R = 19.1, and
I = 19.3 on Mar. 5.17.

     E.S. Walker, Yale University; P. A. Mazzali, Liverpool John Moores
University, Max-Planck-Institut fuer Astrophysik, Garching, and Istituto
Nazionale di Astrofisica (INAF), Padova; and E. Pian (Scuola Normale
Superiore, Pisa, and INAF, Trieste, report that they obtained a CCD
spectrogram (range 350-800 nm) of 2013al using the DOLORES spectrograph on
the Telescopio Nazionale di Galileo (TNG) situated at La Palma on Mar. 7.1
UT.  The spectrum is that of a type-Ia supernova.  Using the Gelato
(Harutyuyan et al. 2008, A.Ap. 488, 383) and Superfit (Howell et al. 2005,
Ap.J. 643, 1190) codes, the best matches to the spectrum of 2013al are
spectroscopically normal supernovae at or just after maximum light.  SN
2013al is slightly offset from its host galaxy, SDSS J111454.06+293508.6,
for a which a spectrum was also obtained; the galaxy shows emission lines of
[O II], H_beta, [O III], and H_alpha at redshift 0.1321, which is consistent
with that obtained via the features of the supernova.  After correcting for
the host-galaxy redshift, the absorption minimum of the Si II 635.5-nm line
corresponds to a blueshift of 12900 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 March 12                    (CBET 3438)              Daniel W. E. Green