2004IAUC.8379....3P

F. Patat and G. Pignata, European Southern Observatory; and S. Benetti, Istituto Nazionale di Astrofisica, on behalf of the ERTN (see IAUC 8341), report that a fully reduced spectrum (range 320-900 nm; resolution 1.2 nm) of SN 2004dk (cf. IAUC 8377), obtained on Aug. 3.85 UT by J. Aceituno at the Calar Alto Observatory 2.2-m telescope (+ CAFOS), shows it to be a type-Ic supernova. The spectrum is similar to that of SN 1994I (Filippenko et al. 1995, Ap.J. 415, L11) a few days before maximum light, showing transitions from Ca II, Fe II, Na I, Si II, and O I, all accompanied by P-Cyg profiles. The photospheric expansion velocity, deduced from the minimum of the Si II 635.5-nm absorption trough, is about 9100 km/s.