2007IAUC.8790....2Q

Further to IAUC 8622, R. Quimby, F. Castro, and P. Mondol, University of Texas, report the discovery of a supernova on unfiltered CCD images taken on 2006 Dec. 12.48 and 16.48 UT (both at mag about 16.7) using the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory. SN 2006tf is located at R.A. = 12h46m15s.82, Decl. = +11o25'56".3 (equinox 2000.0), which is 0".2 east and 0".7 north of the center of the faint apparent host galaxy; nothing appeared at this location in co-added of ROTSE-IIIb images taken between 2004 Dec. and 2005 June (limiting mag about 19.1). A spectrum (range 420-890 nm) of 2006tf, obtained on Dec. 22.50, shows it to be a type-IIn supernova (details on CBET 793).