Electronic Telegram No. 634
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 2006gj IN UGC 2650
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of SN
2006gj (cf. CBET 631, IAUC 8751), obtained on Sept. 20.43 UT by P. Berlind
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be
a type-Ia supernova around maximum light.  Cross-correlation with a library
of type-Ia supernova spectra indicates that 2006gj is most similar to SN
1992A (Kirshner et al. 1993, Ap.J. 415, 589) at -1 day from maximum light.
Adopting a recession velocity of 8482 km/s for the host galaxy (from Huchra
et al. 2007, private communication, in preparation), the maximum absorption
in the Si II line (rest 635.5 nm) is blueshifted by roughly 11500 km/s.
Also, interstellar Na I D absorption at the redshift of the host galaxy is
visible in the spectrum with an equivalent width of 0.2 nm.


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                         (C) Copyright 2006 CBAT
2006 September 20                (CBET 634)               Daniel W. E. Green