2004IAUC.8437....3F

A. V. Filippenko and R. J. Foley, University of California, Berkeley, report that inspection of CCD spectra (range 320-940 nm), obtained on Nov. 14 UT with the 10-m Keck I telescope (+ LRIS), shows that SN 2004fa (IAUC 8420), SN 2004fd, SN 2004fg (IAUC 8425), SN 2004fw (IAUC 8431), and SN 2004fy (IAUC 8435) are of type Ia, with respective spectral-feature ages (Riess et al. 1997, A.J. 114, 722) of 2 months, 19 days, 0 day, 8 days, and 11 days past maximum brightness (with an uncertainty of ± 2 days at early times). The expansion velocities of the ejecta, as measured from the minimum in the Si II 635.5-nm absorption trough, is about -11000, -7700, and -9500 km/s for SN 2004fg, SN 2004fw, and SN 2004fy, respectively. Interstellar Na I D absorption at the redshifts of the host galaxies is visible in the spectra of SN 2004fg and SN 2004fw (0.1-nm equivalent width in both cases).