2009CBET.1992....3S

J. M. Silverman and A. V. Filippenko, University of California, Berkeley; and R. J. Foley, Harvard-Smithsonian Center for Astrophysics, report that inspection of CCD spectra (range 340-1010 nm), obtained on Oct. 22 UT with the Keck I 10-m telescope (+ LRIS), shows that 2009ju (CBET 1974) is a type-II supernova; the H-alpha emission component greatly dominates over the absorption. SN 2009jx (CBET 1979) is also a type-II supernova, shortly after explosion; the spectrum is quite blue and nearly featureless, showing only very weak Balmer lines. A spectrum of 2009ka shows it to be a type-II supernova, probably of type IIb (although the He I lines are not yet obvious); 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 most like the type-IIb supernova 1993J about four days before maximum light.