Electronic Telegram No. 705
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 2006lf IN UGC 3108
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2006lf
(cf. CBET 704), obtained on Oct. 28.51 UT by M. Calkins and S. Blondin with
the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a
type-Ia supernova around one week before maximum light.  Cross-correlation
with a library of supernova spectra indicates that 2006lf is most similar to
the type-Ia supernova 1994D at -9 days from maximum light.  Adopting a
recession velocity of 3959 km/s for the host galaxy (from de Vaucouleurs et
al. 1991, Third Reference Catalogue of Bright Galaxies), the maximum
absorption in the Si II line (rest 635.5 nm) is blueshifted by roughly 11500
km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2006 CBAT
2006 October 28                  (CBET 705)               Daniel W. E. Green