2011CBET.2713....2S

M. Stritzinger, A. Jerkstrand, J. Sollerman, M. Ergon; Oskar Klein Centre, Stockholm University; and R. J. Foley; Harvard-Smithsonian Center for Astrophysics, on the behalf of the Millenium Center for Supernova Studies (Universidad de Chile), report that they obtained a spectrogram on Apr. 28.2 UT of 2011cd with the Gemini-South telescope (+ GMOS). The spectrum contains a rich number of emission lines including, among others: numerous Fe II lines between 400 and 550 nm; Mg I] at 451 nm; Na I D, possibly blended with He I 588-nm; [O I] at 558 and 630/636 nm; H_alpha; Fe II at 715 nm; [Ca I] at 730 nm; O I at 777 nm; a prevalent emission feature due to the Ca II near-infrared triplet; and a tentative identification of He I at 707 nm. All emission features except the Ca lines show strong blueshifts, with H_alpha showing the most pronounced blueshift of approximately 3500 km/s. The spectrum is consistent with that of a type-II supernova at late phases.