2010CBET.2514....2M

N. Morrell, Las Campanas Observatory; and G. Folatelli, IPMU, University of Tokyo, reports on spectroscopic observations (range 330-950 nm) of 2010ja, obtained on Oct. 22.4 UT with the Boller and Chivens spectrograph attached to the 2.5-m du Pont telescope at Las Campanas Observatory. The low-signal-noise spectrum of 2010ja is that of an evolved type-Ia supernova; cross-correlation with a library of supernova using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024) shows 2010? to be most similar to SN 1991bg at about three months after maximum light.