Electronic Telegram No. 1693
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 2009ac
     A. J. Drake, A. Mahabal, S. G. Djorgovski, R. Williams, and M. J. Graham,
California Institute of Technology; M. Catelan, Pontificia Universidad
Catolica; E. C. Beshore, S. M. Larson, and R. Hill, Lunar and Planetary
Laboratory, University of Arizona; and E. Christensen, Gemini Observatory,
report the CRTS (cf. CBET 1589) discovery of an apparent supernova in
unfiltered Catalina Sky Survey (CSS) images:

 SN       2009 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2009ac   Feb. 5.13    2 08 30.11  +12 44 18.5   17.4    3".5 E, 18".2 N

Further magnitudes for 2009ac:  Jan. 18.16 UT, [20.0 (CSS); Feb. 12.13,
g = 18.6, r = 18.0, i = 18.3 (Palomar 1.52-m reflector + Gunn filters).
The host galaxy, SDSS J020829.87+124400.0, has Gunn magnitudes u = 18.1, g =
16.1, r = 15.3, i = 14.9, and z = 14.5, and redshift z = 0.035.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 February 14                 (CBET 1693)              Daniel W. E. Green