[IAUC] CBET 565: 20060627 : SUPERNOVA 2006dk IN NGC 4161

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                                                  Electronic Telegram No. 565
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 2006dk IN NGC 4161
     M. Dennefeld, Institut d'Astrophysique de Paris; J. M.
Bonnet-Bidaud, Service d'Astrophysique, Saclay; and S. Benetti, E.
Cappellaro, N. Elias-Rosa, and A. Harutyunyan, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica, report
that a noisy spectrogram (range 368-732 nm, resolution 0.5 nm),
obtained on June 26.92 UT with the Carelec spectrograph on the 1.93-m
telescope at Haute-Provence Observatory, shows that SN 2006dk (cf.
CBET 561) is a type-II supernova caught close to explosion.  The
spectrum is dominated by a relatively blue continuum having overimposed
a broad and faint H-alpha emission (FWHM about 11700 km/s).  A broad
and faint He I 587.6-nm feature with a P-Cyg profile is also visible,
and from its absorption an expansion velocity of about 11500 km/s is
deduced (assuming a recession velocity of 4946 km/s from Falco et al.
1999, PASP 111, 438l; via NED).


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                         (C) Copyright 2006 CBAT
2006 June 27                     (CBET 565)               Daniel W. E. Green