2010CBET.2225....2G

M. L. Graham, A. J. Maxwell, C. J. Pritchet, A. Parker, S. Sadavoy, Department of Physics and Astronomy, University of Victoria; and D. D. Balam, Dominion Astrophysical Observatory, National Research Council of Canada, report that a spectrogram (range 390-703 nm, resolution 0.3 nm) of 2010ba, obtained on Mar. 23.28 with the 1.82-m Plaskett Telescope of the National Research Council of Canada, shows it to be a type-Ia supernova several days before maximum light. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2010ba is most similar to the type-Ia supernova 2002bo at 3 days pre-maximum.