2009CBET.1930....1S

J. M. Silverman, M. T. Kandrashoff, A. J. L. Morton, and A. V. Filippenko, University of California, Berkeley, report that inspection of a CCD spectrum (range 340-1020 nm), obtained on Aug. 28 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that 2009ih (CBET 1919) is a type-Ia supernova similar to the subluminous supernova 1991bg (Filippenko et al. 1992, A.J. 104, 1543). After removing the host-galaxy recession velocity (9858 km/s; Falco, et al. 1999, Ap.J. 560, 566), the absorption minimum of the Si II 635.5-nm feature is found to be blueshifted by about 10500 km/s. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that it is about five days past maximum light.