2010CBET.2501....1P

J. L. Prieto, Carnegie Observatories, reports that an optical spectrum (range 370-930 nm; resolution 0.7nm) of 2010ir (cf. CBET 2494) was obtained with the APO 3.5-m telescope (+ DIS) on Oct. 14.4 UT. The spectrum shows broad He I and Balmer lines in absorption. After cross-correlation with a library of supernova spectra using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024), 2010ir is found to be most similar to the type-IIb supernova 2000H at 13 days after maximum.