[IAUC] CBET 1036: 20070817 : SUPERNOVA 2007gr IN NGC 1058

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                                                  Electronic Telegram No. 1036
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2007gr IN NGC 1058
     R. Chornock, A. V. Filippenko, W. Li, and R. J. Foley, University of
California, Berkeley, report that inspection of a preliminary calibration of
CCD spectra (range 340-960 nm), obtained by D. Reitzel and R. M. Rich
(University of California, Los Angeles) on Aug. 16.5 UT with the 3-m Shane
telescope (+ Kast) at Lick Observatory, shows that 2007gr (CBET 1034) is a
type-Ib/c supernova, not long after the explosion.  He I lines might be
present (e.g., there is a prominent absorption line that could be either He
I 587.6-nm or Na I D), but it is too early to clearly determine whether the
object is of type Ib.  Strong absorption troughs due to O I 777.4-nm and the
Ca II near-infrared triplet are present, as is often the case in type-Ic
supernovae.


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                         (C) Copyright 2007 CBAT
2007 August 17                   (CBET 1036)              Daniel W. E. Green