2012CBET.3240....1D

A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams, California Institute of Technology; J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad Catolica de Chile; and S. M. Larson and E. Christensen, Lunar and Planetary Laboratory, University of Arizona, report the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images:

---------------------------------------------------------------------------— SN 2012 UT R.A. (2000.0) Decl. Mag. Offset ---------------------------------------------------------------------------— 2012fc Sep. 20.26 23 10 12.71 +30 34 42.6 17.2 18".1 E, 8".1 S ---------------------------------------------------------------------------—

The variable was designated PSN J23101271+3034426 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012fc based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012fc (unfiltered unless noted otherwise): Aug. 12.30 UT, [20.0 (CSS); Sept. 21.097, 17.4 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 reflector + Apogee U-47 camera; limiting magnitude 19.0; position end figures 12s.73, 42".6; UCAC3 reference stars); 21.316, 17.3 (Joseph Brimacombe, Cairns, Australia; luminance filter; position end figures 12s.76, 42".4; image posted at website URL http://www.flickr.com/photos/43846774@N02/8014703626/); 21.837, 17.1 (Xavier Bros, Ager, Spain; 35-cm f/4.6 reflector; position end figures 12s.76, 42".5; UCAC2 reference stars; image posted at website URL http://www.anysllum.com/PSN_PGC70602.jpg); 21.872, R_c = 17.5 (Massimiliano Martignoni, Magnago, Italy; 25-cm Schmidt-Cassegrain reflector; position end figures 12s.78, 42".4); 21.911, 17.5 (David Grennan, Dublin, Ireland; limiting mag 19.6; position end figures 12s.77, 42".7; image posted at URL http://www.webtreatz.com/images/J23101271+3034426.jpg.