2004IAUC.8277....3M

Matheson et al. also report that a spectrum of SN 2004J (cf. IAUC 8272), obtained as above on Jan. 27.20 UT, shows it to be a type-Ia supernova about two weeks past maximum. Narrow emisson lines superimposed on the spectrum of the supernova indicate a recession velocity for the host galaxy of 7570 km/s. A spectrogram of SN 2004K (cf. IAUC 8273), obtained by Berlind on Jan. 27.55, shows it to be a type-Ia supernova about a week past maximum; adopting the NASA/IPAC Extragalactic Database (NED) recession velocity of 10832 km/s for the host galaxy, the supernova expansion velocity is 11800 km/s for Si II (rest 635.5 nm). The spectral- feature age (Riess et al. 1997, A.J. 114, 722) of SN 2004K is 8 ± 2 days after maximum light. A spectrogram of SN 2004L (cf. IAUC 8274), obtained on Jan. 27.40, shows it to be a type-Ia supernova near maximum; adopting the NED recession velocity of 9686 km/s for the host galaxy, the supernova expansion velocity is 10000 km/s for Si II (rest 635.5 nm). The spectral-feature age of SN 2004L is 1 ± 2 days before maximum light.