2010CBET.2520....2M

N. Morrell, Las Campanas Observatory, Carnegie Supernova Project, reports that a spectrum (range 335-956 nm), obtained on Oct 31.24 UT with the Las Campanas 2.5-m du Pont telescope (+ Boller and Chivens spectrograph), shows 2010jb to be a young type-Ia supernova. Cross-correlation with a library of supernova spectra via the Supernova Identification tool (SNID, Blondin and Tonry 2007, Ap.J. 666, 1024) suggests that 2010jb is a normal type-Ia supernova around one week before maximum brightness, best matching the spectrum of SN 2003du at six days before maximum light. Assuming for IC 1615 a recession velocity of 7671 km/s (Mathewson and Ford 1996, Ap.J. Suppl. 107, 97; via NED), the minimum of the Si II 635.5-nm absorption is blueshifted by 11800 km/s.