[IAUC] CBET 3964: 20140905 : SUPERNOVA 2014cy IN NGC 7742 = PSN J23441603+1046125

Vie Sep 5 09:15:30 ART 2014

                                                  Electronic Telegram No. 3964
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 2014cy IN NGC 7742 = PSN J23441603+1046125
     K. Nishimura, Ebetsu, Hokkaido, Japan, reports the discovery of an
apparent supernova (mag 16.2) on unfiltered CCD exposures taken on Aug. 31.662
UT with a 0.35-m reflector (+ SBIG ST-8XME camera).  The new object is located
at R.A. = 23h44m16s.03, Decl. = +10d46'12".5 (equinox 2000.0), which is 1"
east and 12" north of the center of NGC 7742.  The variable was designated PSN
J23441603+1046125 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2014cy based on the spectroscopic confirmation reported
below.  The type-II supernova 1993R also appeared in NGC 7742 (cf. IAUC 5812).
     Additional CCD magnitudes for 2014cy:  Sept. 1.153, V = 15.8 (S. Kiyota,
Kamagaya, Chiba, Japan; remotely with an iTelescope 0.32-m telescope at Nerpio,
Spain; position end figures 15s.99, 11".8; offset 3".8 east, 10".4 north; image
posted at URL http://meineko.sakura.ne.jp/ccd/PSN_J23441603+1046125.jpg);
2.427, 16.9 (J. Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS
telescope + STXL-6303 camera at the New Mexico Skies observatory near Mayhill,
NM, U.S.A.; position end figures 15s.99, 10".7; offset 0".2 east, 9".7 north;
image posted at URL https://www.flickr.com/photos/43846774@N02/15119112241/);
3.025, 16.1 (T. Yusa, Osaki, Japan; remotely using an iTelescope 0.43-m f/6.8
astrograph at the AstroCamp Observatory, Nerpio, Spain; position end figures
16s.03, 12".1; offset 4" east, 11" north; limiting mag 19.3; image posted at
URL http://space.geocities.jp/yusastar77/supernova/PSNin7742_140903.htm).

     N. Morrell, M. M. Phillips, and C. Contreras, Las Campanas Observatory;
G. H. Marion, University of Texas, Austin; E. Y. Hsiao, C. Gall, and M. D.
Stritzinger, Aarhus University; and R. P. Kirshner, Harvard-Smithsonian Center
for Astrophysics, report on the spectroscopic classification of PSN
J23441603+1046125 = SN 2014cy using a near-infrared spectrogram (range
800-2500 nm) obtained on Sept. 3.19 UT with the FoldedPort Infrared Echellette
(FIRE) spectrograph on the 6.5-m Magellan Baade Telescope at Las Campanas.
The spectrum shows that 2014cy is a type-II supernova, approximately 10 days
past explosion.  The near-infrared spectrum is similar to that of SN 2013hj at
approximately 10 days past explosion with weak hydrogen Paschen P-Cyg lines.
The supernova redshift approximately matches the redshift of the presumed host
galaxy (NGC 7742) at z = 0.00555 (Theureau et al. 1998, A.Ap. Suppl. 130, 333;
via NED).


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

                         (C) Copyright 2014 CBAT
2014 September 5                 (CBET 3964)              Daniel W. E. Green