2010CBET.2245....2M

A. J. Maxwell, M. L. Graham, A. Parker, S. Sadavoy, and C. J. Pritchet, Department of Physics and Astronomy, University of Victoria; E. Y. Hsiao, Lawrence Berkeley Laboratory; and D. D. Balam, Dominion Astrophysical Observatory, National Research Council of Canada, report that a noisy spectrogram (range 390-703 nm, resolution 0.3 nm) of 2010br, obtained on Apr. 14.25 with the 1.82-m Plaskett Telescope of the National Research Council of Canada, shows the spectrum to be similar to that of a type-Ib/c supernova. Comparison with a library of supernova spectra using the "superfit" matching program of Howell et al. (2005, Ap.J. 634, 1190) indicates that 2010br is similar to the type-Ib/c supernova 1987K. Balam reports that his CCD image taken on Apr. 15.21 yields position end figures 10s.96, 42".8 (offset 14".3 east, 9".7 south of the core of NGC 4051) and magnitude R = 18.3 ± 0.1.