Electronic Telegram No. 892
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://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2007ao IN NGC 5532
     M. Sullivan, University of Toronto; and P. E. Nugent, Lawrence
Berkeley National Laboratory, report that a spectrogram (range 360-950
nm) of 2007ao (CBET 883), obtained on Mar. 17.5 UT with the Keck I 10-m
telescope (+ LRIS), shows it to be a subluminous type-Ia supernova
approximately 2 weeks past peak brightness.  The spectrum is similar to
those of SNe 1991bg and 1999by at similar epochs (Filippenko et al.
1992, A.J. 104, 1543; Garnavich et al. 2004, Ap.J. 613, 1120).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 March 17                    (CBET 892)               Daniel W. E. Green