Electronic Telegram No. 1778
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 2009do IN MCG +09-21-22
     Further to CBET 1759, S. B. Cenko, W. Li, and A. V. Filippenko,
University of California, report the LOSS discovery of an apparent
supernova on unfiltered KAIT images:

 SN       2009 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2009do   Apr. 22.33   12 34 58.35  +50 51 04.4   16.3    9".0 W, 0".4 N

Additional KAIT magnitudes for 2009do in MCG +09-21-22:  Apr. 5.28 UT, [17.4;
23.29, 16.1.
     P. Challis, Harvard-Smithsonian Center for Astrophysics (CfA), on
behalf of the CfA Supernova Group, reports that a spectrum (range 360-750 nm)
of 2009do, obtained on Apr. 24 UT by A. Vaz with the F. L. Whipple
Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia supernova.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
indicates that 2009do is a normal type-Ia event around maximum brightness.
The redshift, as measured from the supernova features, is about 0.04.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 April 24                    (CBET 1778)              Daniel W. E. Green