Electronic Telegram No. 478
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 2006bm
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis,
Harvard-Smithsonian Center for Astrophysics, report that a spectrum
(range 350-740 nm) of SN 2006bm (cf. IAUC 8699), obtained on Apr. 20.27
UT by W. Peters with the F. L. Whipple Observatory 1.5-m telescope (+
FAST), shows it to be a type-Ia supernova several weeks past maximum
light.  Cross-correlation with a library of supernova spectra indicates
that SN 2006bm is similar to the normal type-Ia supernova 1994D at 45
days past maximum light (cf. Patat et al. 1996, MNRAS 278, 111), at an
approximate redshift of z = 0.07 +/- 0.01 (cz = 21000 +/- 3000 km/s).
A comparison between these two supernovae can be seen at
http://cfa-www.harvard.edu/
oir/Research/supernova/spectra/sn2006bm_vs_sn1994D.gif


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 April 21                    (CBET 478)               Daniel W. E. Green