2009CBET.1929....2S

J. M. Silverman, M. T. Kandrashoff, A. J. L. Morton, and A. V. Filippenko, University of California, Berkeley, report that inspection of a noisy CCD spectrum (range 340-1020 nm), obtained on Aug. 28 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that 2009ir is a type-II supernova. The H-alpha emission greatly dominates over the absorption component. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) suggests that it is within about one week past maximum light. The host-galaxy recession velocity is measured to be 8850 km/s from narrow emission lines (H-alpha and [O II] 372.7 nm), significantly different from the previously reported value of 6185 km/s (de Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies).