Electronic Telegram No. 1684
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2009Y IN NGC 5728
     Ralph Martin, Perth Observatory, reports the discovery of an apparent
supernova (mag 16 +/- 0.5) in R-band CCD images collected as part of the
Perth Automated Supernova Search using the 0.61-cm Perth Lowell Telescope
on Feb. 1.7694 and 2.7243 UT.  The new object is located at R.A. =
14h42m23s.85, Decl. = -17o14'48".4 (equinox 2000.0; uncertainty 0".2 in each
coordinate), which is 9" east and 24".6 north of the center of NGC 5728.
Nothing was visible at this position on an image taken on Jan. 16 (no
limiting magnitude provided).  An independent discovery of 2009Y was made by
C. Griffith, S. B. Cenko, W. Li, and A. V. Filippenko, University of
California, on unfiltered KAIT images taken in the course of the Lick
Observatory Supernova Search; they provide position end figures 24s.55,
46".3 (offset 9".3 east, 24".7 north) and the following KAIT magnitudes:
2008 July 27.20, [18.5; 2009 Feb. 2.54, 15.3; 4.48, 14.9.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 February 5                  (CBET 1684)              Daniel W. E. Green