2006CBET..565....1D

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).