2012CBET.2970....3C

J.-C. Chen and X.-F. Wang, Tsinghua Center for Astrophysics, Tsinghua University; X. Zhan, Beijing Planetarium; T.-M. Zhang, National Astronomical Observatory of China (NAOC), report on an optical spectrogram (range 400-8800 nm) of PSN J14532301+0257431 = SN 2011jt that was obtained on 2012 Jan. 3.9 UT with the 2.16-m telescope (+ OMR) at Xinglong Station of NAOC. The spectrum is consistent with a type-Ia supernova at about one week before maximum. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it matches with SN 2002bo at -9 days. Adopting a recession velocity of 8334 km/s for the host galaxy from the NED, they measure a velocity of the Si II 635.5-nm absorption feature to be about 15000 km/s.