2004CBET...79....1M

M. Modjaz, R. Kirshner and P. Challis, Harvard-Smithsonian Center for Astrophysics; and T. Matheson, National Optical Astronomy Observatory, report that a spectrum (range 350-740 nm) of SN 2004ec (cf. IAUC 8396), obtained by M. Calkins on Sept. 10.13 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-IIn supernova. The spectrum consists of a blue continuum, indicating young age, and a narrow H_alpha component of 360 km/s (FWHM) superposed on a weaker and broader component of 1800 km/s (FWHM). A spectrogram of SN 2004ed (cf. IAUC 8397), obtained by Calkins on Sept. 10.17, shows it to be a late-time type-II supernova with strong H_alpha emission, an H_beta P-Cyg profile and other elements in absorption. Adopting the NED recession velocity of 7500 km/s for the host galaxy, the expansion velocity derived from the minimum of the H_beta line is 6200 km/s.