Electronic Telegram No. 716
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 2006lu
     N. Morrell and G. Folatelli, on behalf of the Carnegie Supernova
Project, report that a spectrogram (range 401-1020 nm) of 2006lu (cf.
IAUC 8770), obtained on Nov. 3.31 UT with the EMMI spectrograph attached
to the New Technology Telescope at La Silla, reveals that it is a
type-Ia supernova, a few days after maximum light.  A narrow emission
line was identified as H-alpha produced by the host galaxy.  From the
position of that line, a redshift of z = 0.053 was derived for the
host.  Adopting that redshift value, the spectral-feature dating code
by Riess et al. (1997, A.J. 114, 722) yields an age of 5.5 days after
maximum light.  Using the 'superfit' supernova-spectrum-comparison
code (Howell et al. 2005, Ap.J. 634, 1190), the best match is a
spectrum of SN 1990N, seven days after maximum.  An expansion velocity
of 10500 km/s was derived from the absorption minimum of the Si II
635.5-nm feature.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 November 3                  (CBET 716)               Daniel W. E. Green