[IAUC] CBET 2486: 20101008 : POSSIBLE SUPERNOVA IN NGC 5430

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2486
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


POSSIBLE SUPERNOVA IN NGC 5430
     Guoyou Sun, Wenzhou, Zhejiang, China; and Xing Gao, Urumqi, Xinjiang,
China, report the discovery of a possible supernova (mag approximately 17.2)
on 60-s survey images (limiting mag about 19) taken by Xing Gao in the
course of the Xingming Observation Sky Survey at Mt. Nanshan around Oct. 3.605
UT using an unfiltered CCD camera with a Celestron C14 Schmidt-Cassegrain
telescope.  The new object is located at R.A. = 14h00m47s.12 +/- 0s.12, Decl.
= +59d20'17".0 +/- 0".2 (equinox 2000.0; measured by Sun), which is 13".7
west and 33".5 north of the nucleus of NGC 5430.  Nothing is visible at this
position on a Digitized Sky Survey image from 1997 Apr. 8 (limiting mag about
19.5; no bandpass stated).  Additional magnitudes for the variable provided
by Sun:  Oct. 4.578, 17.2; 5.588, 16.9; 6.584, 16.7.
     Following posting on the Central Bureau's unconfirmed-objects webpage,
G. Cortini (Predappio, Italy, 0.35-m telescope) reports that the variable
appeared at mag 17.3 with position end figures 47s.08, 17.0 (offset 1".3
east, 34" north of the center of NGC 5430) on several unfiltered CCD images
(limiting mag about 18.5) taken on Oct. 6.81.  S. Nakano, Sumoto, Japan,
forwards mag 17.0 and position end figures 47s.09, 16".6 (offset 10" east,
33" north) from unfiltered CCD images (limiting mag 18.0) taken by K. Kadota
(Ageo, Japan, 0.25-m f/5 reflector + SBIG ST-9E camera) on Oct. 6.080.  T.
Yusa, Osaki, Japan, reports mag 17.0 and position end figures 47s.10, 16".7
(offset 10" east, 33" north of the center of NGC 5430) from unfiltered CCD
frames (limiting mag 18.5) taken on Oct. 7.402 with a 0.30-m f/7 Cassegrain
telescope (+ SBIG STL-1001E camera).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 October 8                   (CBET 2486)              Daniel W. E. Green