2010CBET.2474....2S

J. M. Silverman, S. B. Cenko, J. Choi, and A. V. Filippenko, University of California, Berkeley, report that inspection of CCD spectra (range 340-980 nm), obtained on Oct. 1 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that 2010ii is a type-Ia supernova; after removal of the host-galaxy recession velocity of 8075 km/s (Wegner et al. 1993, A.J. 105, 1251), the absorption minimum of the Si II 635.5-nm line is found to be blueshifted by about 15000 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 2010ii is about one week before maximum brightness.