2004IAUC.8344....2P

G. Pignata and F. Patat, European Southern Observatory; and S. Benetti and A. Harutyunyan (INAF), on behalf of the 'European Research and Training Network on the Physics of Type Ia Supernovae', report that full reduction of a spectrogram (range 380-880 nm; resolution 1.1 nm) of SN 2004bs (cf. IAUC 8341), obtained at Calar Alto Observatory on May 19.87 UT using the 2.2-m reflector (+ CAFOS), shows that this to be a type-Ib supernova, about 3 weeks past maximum. The spectrum is dominated by helium lines at 587.6, 667.8 and 706.5 nm; the photospheric velocities of these three features (deduced from the minima of absorption throughs) are 10800, 10200, and 10100 km/s, respectively. Other features are identified as Ca II and Fe II. The recession velocity at the supernova position (measured from the unresolved H_alpha line) is 5165 km/s, in good agreement with the value for NGC 3393 listed by NED (5164 km/s).