2005IAUC.8523....3M

M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian Center for Astrophysics, report that a spectrogram (range 340-730 nm) of SN 2005by, obtained by T. Groner on May 4.31 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-II supernova. The spectrum consists of a flat continuum and P-Cyg lines of H_alpha and H_beta. Adopting the NED recession velocity of 8202 km/s for the host galaxy (from Falco et al. 1999, PASP 111, 438), the expansion velocity derived from the minimum of the H_beta line is about 13000 km/s.