2004IAUC.8374....2F

Further to IAUC 8372, R. J. Foley, H. Pugh, and A. V. Filippenko (University of California) report that inspection of CCD spectra, obtained on July 18 UT, reveals that SN 2004by (IAUC 8349) is a peculiar type-II supernova. The object shows very narrow H_alpha emission (at most a few hundred km/s FWHM) and a corresponding low-velocity P-Cyg absorption line. SN 2004cz (IAUC 8368) and SN 2004dd (IAUC 8373) are normal type-II-P supernovae, with well-developed P-Cyg profiles of H, Ca II, Fe II, and other species. In SN 2004cz, the Na I D line (with a P-Cyg profile) is especially strong compared with that in SN 2004dd.