2009CBET.1883....1S

T. N. Steele, I. K. W. Kleiser, A. J. L. Morton, R. Chornock, and A. V. Filippenko, University of California, Berkeley, report that inspection of a CCD spectrum (range 350-1080 nm), obtained on July 23 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that SN 2009gk (CBET 1859) is a type-IIb supernova. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) finds a best-fit match with the spectrum of SN 1993J at 6 days after maximum light. The expansion velocity measured from the minimum of the H-alpha absorption is 11,300 km/s.