[IAUC] CBET 3838: 20140324 : SUPERNOVA 2014ai IN NGC 2832 = PSN J09194417+3345496

Lun Mar 24 09:50:53 ART 2014

                                                  Electronic Telegram No. 3838
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 2014ai IN NGC 2832 = PSN J09194417+3345496
     D. A. Forbes and J. Janz, Swinburne University; M. A. Norris, Max Planck
Institute for Astronomy; S. Penny, Monash University; and A. J. Romanowsky,
San Jose State University, report the discovery of an apparent supernova (mag
approximately 18.1) on an ESI guide-camera image taken on Mar. 21.2 UT with
the Keck-II telescope.  The object is located at R.A. = 9h19m44s.17, Decl. =
+33d45'49".4 (equinox 2000.0), which is 34".4 west and 50".3 north of the
center of the galaxy NGC 2832.  Nothing is visible at this position in the
Sloan Digital Sky Survey or in archival Hubble Space Telescope images.
Spectroscopy (range 400-1000 nm) of the variable was also obtained with the
ESI, and the spectrum has the appearance of a type-Ia supernova near maximum
light; the variable has thus been assigned the designation SN 2014ai.

     Syuichi Nakano, Sumoto, Japan, reports an independent discovery of 2014ai
by Koichi Itagaki (Teppo-cho, Yamagata, Japan) at mag 16.8 on an unfiltered
CCD frame (limiting magnitude 19.0) taken on Mar. 23.449 UT using a 0.50-m
f/6.8 reflector remotely at the Takanezawa station, Tochigi-ken, with the
position of the supernova given as R.A. = 9h19m44s.17, Decl. = +33d45'49".6
(equinox 2000.0; reference stars from UCAC4 catalogue), which is 33".4 west
and 50".5 north of the nucleus of the galaxy NGC 2832.  Itagaki has posted his
discovery image at website URL http://k-itagaki.jp/images/NGC2832.jpg.  The
variable was designated PSN J09194417+3345496 when it was posted at the
Central Bureau's TOCP webpage.  Additional CCD magnitudes of 2014ai reported
to the Central Bureau as a result of the TOCP posting:  2001 Mar. 24.528,
[19.5 (Itagaki; 0.60-m f/5.7 reflector at Yamagata); 2014 Mar. 16.546, [17.5
(Itagaki; 0.50-m reflector, Takanezawa station); 23.556, 17.1 (Toshihide
Noguchi, Katori, Chiba-ken, Japan; four stacked 30-s frames using a 0.23-m
reflector + BITRAN BT-11E camera; limiting mag 18.5; position end figures
44s.19, 49".7; galaxy center at position end figures 46s.85, 44'59".1;
image posted at URL http://park8.wakwak.com/~ngc/images/PSNinNGC2832.jpg;
communicated by Nakano); 23.572, V = 17.23, I_c = 16.57 (Seiichiro Kiyota,
Kamagaya, Japan; 0.25-m f/6.3 Schmidt-Cassegrain telescope + Apogee Alta E47
camera; position end figures 44s.18, 45'49".4; UCAC3 reference stars; image
posted at URL http://meineko.sakura.ne.jp/ccd/PSN_J09194417+3345496.jpg);
23.961, 16.5 (G. Masi, F. Nocentini, and P. Schmeer; remotely using a 43-cm
telescope near Ceccano, Italy; position end figures 44s.18, 45'49".3); 24.218,
16.5 (T. Yusa, Osaki, Japan; remotely with a 0.25-m f/3.4 hyperbolic
astrograph + SBIG ST-10XME camera at the RAS Observatory near Mayhill, NM,
U.S.A.; position end figures 44s.13, 45'48".7; limiting mag 18.0; image posted
at URL http://space.geocities.jp/yusastar77/supernova/PSNinN2832_140324.htm).


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                         (C) Copyright 2014 CBAT
2014 March 24                    (CBET 3838)              Daniel W. E. Green