[IAUC] CBET 4053: 20150124 : SUPERNOVA 2015E

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 4053
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 2015E
     Tomoki Morokuma, Institute of Astronomy, University of Tokyo; Nozomu
Tominaga, Emiko Matsumoto, and Takumi Shibata, Konan University; Masaomi
Tanaka, National Astronomical Observatory of Japan; Katsuhiko Mameta, Hyogo,
Japan; and Masanori Takeishi, Hokkaido, Japan, report -- on behalf of the Kiso
Supernova Survey (KISS) collaboration -- the discovery of an apparent
supernova (mag 17.0) on a g-band CCD image (limiting mag 20.7) taken on Jan.
13.42 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 in Nagano, Japan.
The new object is located at R.A. = 3h13m35s.31, Decl. = +0d15'03".1 (equinox
2000.0), which is 1".4 west and 0".8 north of the presumed host galaxy (SDSS
J031335.41+001502.3; z = 0.041, from the Sloan Digital Sky Survey database).
Nothing is seen at this position in an image taken on 2014 Dec. 23 or in the
previous Sloan Digital Sky Survey image.  The supernova was also confirmed in
R_c and J bands on 2015 Jan. 13.56 with the optical and near-infrared
simultaneous imager HONIR (Sakimoto et al. 2012, Proc. SPIE 8446, 844673;
Akitaya et al. 2014, Proc. SPIE 9147, 91474O) attached to the 1.5-m Kanata
Telescope at Higashi-Hiroshima Observatory.

     Ryosuke Itoh, Tatsuya Nakaoka, Yuka Kanda, Miho Kawataba, and Hiroshi
Akitaya, Hiroshima University; Masayuki Yamanaka, Konan University; Yasuhito
Hashiba, Mitsuru Kokubo, Tomoki Morokuma, Mamoru Doi, Shigeyuki Sako, Kazuma
Mitsuda, Yuki Kikuchi, Hidenori Takahashi, and Ken Tateuchi, University of
Tokyo; Hanindyo Kuncarayakti, Millennium Institute of Astrophysics, Chile;
Makoto Watanabe and Hikaru Nakao, Hokkaido University; and Yoichi Itoh, Kumiko
Morihana, Satoshi Honda, Yuhei Takagi, and Jun Takahashi, University of Hyogo,
report that low-resolution optical spectra of SN 2015E were obtained on Jan.
13.56 UT with HOWPol (range 450-900 nm) on the 1.5-m Kanata telescope at the
Higashi-Hiroshima Observatory and on Jan. 18.55 and 19.53 with the Line Imager
and Slit Spectrograph (Hashiba et al. 2014, SPIE 9147, 2; range 400-1000 nm)
on the 2.0-m Nayuta telescope at the Nishi-Harima Observatory.  Cross-
correlation with a library of supernova spectra via the SNID code (Blondin and
Tonry 2007, Ap.J. 666, 1024) shows a best fit with type-Ia supernovae at z =
0.041.


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                         (C) Copyright 2015 CBAT
2015 January 24                  (CBET 4053)              Daniel W. E. Green