Electronic Telegram No. 1830
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 2009ft
     Further to CBET 1825, A. J. Drake et al. report the CRTS discovery of
another apparent supernova in unfiltered CSS images:

 SN       2009 UT       R.A. (2000.0) Decl.       Mag.      Offset
 2009ft   May  23.17   14 24 06.03  + 7 46 10.3   17.9   14".3 E, 32".4 N

Further magnitudes for 2009ft:  Apr. 28.38 UT, [19.5 (CSS); May 25.29,
g = 18.2, r = 18.1 (Plaskett).  The bright apparent-host-galaxy system of
2009ft is at redshift z = 0.057.  However, the location also matches that of
a faint object seen in Sloan Digital Sky Survey images.
     J. M. Silverman, S. B. Cenko, and A. V. Filippenko, University of
California at Berkeley, report that inspection of CCD spectra (range
340-1000 nm), obtained on May 28 UT with the 3-m Shane reflector (+ Kast)
at Lick Observatory, reveals that 2009ft is a normal type-Ia supernova.
Cross-correlation with a library of supernova spectra using the "SuperNova
IDentification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) indicates
that 2009ft is about one week past maximum brightness and most similar to
the normal type-Ia supernova 1992A at six days past maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 June 3                      (CBET 1830)              Daniel W. E. Green