2006CBET..714....1S

A. Soderberg, California Institute of Technology, on behalf of the "Nearby Supernova Factory" collaboration (E. Pecontal and G. Rigaudier, Centre de Recherche Astronomique de Lyon; P. Antilogus, S. Gilles, R. Pain, and R. Pereira, Laboratoire de Physique Nucleaire et de Haute Energies de Paris; C. Buton, Y. Copin, E. Gangler, and G. Smadja, Institut de Physique Nucleaire de Lyon; G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge, R. Scalzo, R. C. Thomas, and B. A. Weaver, Lawrence Berkeley National Laboratory, Berkeley; R. Kessler, Kavli Institute for Cosmological Physics, Chicago; and C. Baltay, A. Bauer, D. Herrera, and D. Rabinowitz, Yale University; along with G. Djorgovski and A. Mahabal, California Institute of Technology), reports the discovery of a supernova (magnitude approximately 19.1, calibrated to R) on a NEAT image (cf. CBET 263) obtained on Oct. 11.4 UT using the QUEST II camera on the Palomar Oschin 1.2-m Schmidt telescope as a part of the Palomar-QUEST Consortium. SN 2006lt is located at R.A. = 2h16m59s.89, Decl. = +30d41'57".4 (equinox 2000.0), which is about 12" from a low-surface-brightness galaxy. A spectrum (range 320-1000 nm) of 2006lt was obtained on Oct. 13.6 with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope. An inspection of this spectrum by Djorgovski and Mahabal suggests that it is a late type-Ib supernova, similar to that of SN 1985F (Filippenko and Sargent 1986, A.J. 91, 691): the spectrum of 2006lt exhibits strong forbidden emission features similar to those in the late-time spectrum of 1985F, including [O I] 630.0-, 636.4-nm, [Ca II] 729.2-, 732.4-nm, O I 777.0-nm, and a blend of other emission features around 870 nm. A redshift of z approximately 0.015 is measured from the [O I] emission feature.