Electronic Telegram No. 569
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2006dm IN MCG -01-60-21
     A. V. Filippenko, D. S. Wong, D. Pooley, and F. J. D. Serduke, University
of California, Berkeley, report that inspection of CCD spectra (range 330-1040
nm), obtained on July 4 UT with the Shane 3-m reflector (+ Kast spectrograph)
at Lick Observatory, shows that SN 2006dm (CBET 568) is of type Ia, about 3-7
days before maximum brightness.  The Si II/Ti II absorption at 580 nm is
relatively strong, suggesting that the object might be slightly subluminous.
However, the continuum is quite blue and the Ti II absorption near 420 nm is
weak or absent, unlike the case in the very subluminous SN 1991bg
(Filippenko et al. 1992, A.J. 104, 1543).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2006 CBAT
2006 July 5                      (CBET 569)               Daniel W. E. Green