2011CBET.2957....1P

G. Pignata, M. Cifuentes, Y. Apostolovski, and M. Vidal, Universidad Andres Bello; J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, P. Sanchez, C. Hervias, and R. Ramirez, Universidad de Chile; C. Farias and F. Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of the CHASE project (which is part of the Millennium Center for Supernova Science collaboration), report the discovery of an apparent supernova (mag approximately 15.0) on an unfiltered image taken on Nov. 27.28 UT with the 0.41-m 'PROMPT 4' telescope located at Cerro Tololo. The new object is located at R.A. = 10:43:02.95 ± 0".2, Decl. = -36:21:52.4 ± 0".2 (equinox 2000.0), which is about 0".5 east and 8".0 south of the center of the galaxy NGC 3354. The variable was designated PSN J10430295-3621524 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011jl based on the spectroscopic confirmation reported below.

Additional CCD magnitudes for 2011jl (unfiltered unless otherwise noted): 2010 Mar. 28.3-2011 Feb. 22.2 UT, [19.5 (eleven stacked CHASE images); Apr. 30.03, [18.0 (CHASE); Nov. 29.35, 15.0 (CHASE); 30.522, 15.5 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 02s.98, 51".4; image posted at website URL http://www.flickr.com/photos/43846774@N02/6432698047/); Dec. 21.668, 15.3 (Brimacombe; infrared filter, bandpass > 700 nm; image posted at website URL http://www.flickr.com/photos/43846774@N02/6558284013/).