2011CBET.2871....4Z

T. Zhang, National Astronomical Observatories of China (NAOC); J. Chen, and X. Wang, Tsinghua Center for Astrophysics, Tsinghua University; and L. Lin and X. Kong, University of Science and Technology of China, report on an optical spectrogram (range 350-820 nm) of PSN J03293530+4052029 = SN 2011gy that was obtained on Oct. 24.73 UT with the 2.16-m telescope (+ OMR) at the Xinglong Station of the NAOC. The spectrum is consistent with a type-Ia supernova at about one week before maximum light. After removal of the host- galaxy recession velocity of about 5061 km/s (from NED), they find the absorption minimum of the Si II 635.5-nm line to be blueshifted by about 12000 km/s. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011gy matches with SN 2002er at -6 days.