[IAUC] CBET 800: 20070110 : SUPERNOVAE 2006te AND 2007C

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                                                  Electronic Telegram No. 800
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2006te AND 2007C
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2006te
(cf. IAUC 8789), obtained on Jan. 9.51 UT by M. Calkins with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia
supernova around 2 weeks past maximum light.  Cross-correlation with a
library of type-Ia supernova spectra indicates that SN 2006te is most
similar to SN 1998V (cf. IAUC 6844) at +13 days past maximum.  Adopting a
recession velocity of 9443 km/s for the host galaxy (from "The Updated
Zwicky Catalog", http://tdc-www.harvard.edu/uzc/), the maximum absorption
in the Si II line (rest 635.5 nm) is blueshifted by roughly 10500 km/s.
     Blondin et al. add that a spectrum (range 350-740 nm) of 2007C (cf.
CBET 798), obtained on Jan. 9.55 UT by Calkins, shows it to be a type-Ib
supernova around maximum light.  The spectrum shows conspicuous lines of He
I (rest 447.1, 587.6 nm) and is most similar to the type-Ib supernova
1998dt (cf. IAUC 7011) at +4 days past maximum light.  Also, interstellar
Na I D absorption at the redshift of the host galaxy is visible in the
spectrum with an equivalent width of 0.3 nm.


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                         (C) Copyright 2007 CBAT
2007 January 10                  (CBET 800)               Daniel W. E. Green