Electronic Telegram No. 1746
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)
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SUPERNOVA 2009bw IN UGC 2890
     V. Stanishev, Centro Multidisciplinar de Astrofisica, Instituto Superior
Tecnico, Lisbon, reports that a spectrum of 2009bw (cf. CBET 1743), obtained
on Mar. 29.37 UT by A. Adamo and G. Micheva with the Nordic Optical Telescope
(+ ALFOSC), shows it to be a type-II supernova soon after explosion.  The
spectrum consists of a blue continuum with superimposed broad P-Cyg profiles
of the hydrogen Balmer lines; but, in addition, H_alpha shows a narrow
emission component at the host-galaxy redshift (1155 km/s; Schneider et al.
1992, Ap.J. Suppl. 81, 5).  Interstellar Na I absorption lines in the Milky
Way and at the redshift of UGC 2890 are visible with equivalent widths of
about 0.16 nm and 0.08 mn, respectively.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 March 30                    (CBET 1746)              Daniel W. E. Green