2012CBET.2976....1K

Further to CBET 2929, M. Kandrashoff, S. B. Cenko, W. Li, and A. V. Filippenko report the LOSS discovery of a possible supernova (mag 16.7) on unfiltered KAIT images taken on Jan. 11.54 UT; the object was found to be located at R.A. = 12:35:52.30, Decl. = +27:55:55.9 (equinox 2000.0), which is 71" west and 103" south of the center of NGC 4559. The variable was designated PSN J12355230+2755559 when it was posted at the Central Bureau's TOCP webpage. Cenko noted that the variable may be associated with one of the satellite galaxies of NGC 4559 (noting that there are a few faint ones nearby, all being at approximately the same redshift). Additional CCD magnitudes for PSN J12355230+2755559 (unfiltered unless noted otherwise): 1990 Mar. 23, [19.5 (Simone Leonini, Siena, Italy; Palomar Sky Survey, N plate); 2010 Apr. 29, [19.0 (Leonini et al., Montarrenti Observatory, in the course of an automatic survey of the Italian Supernovae Search Project using a 0.53-m f/8.7 Ritchey-Chretien telescope + Apogee Alta U47 CCD camera); 2011 Jan. 9.54 UT, [18.0 (KAIT); 11.251, 16.5 (Leonini, with G. Guerrini, P. Rosi, and L. M. Tinjaca Ramirez; pre-discovery images; limiting mag about 18.2; position end figures 52s.25, 55".9); 12.40, 16.4 (KAIT); 13.449, R = 17.7 (Joseph Brimacombe, Cairns, Australia; using a 51-cm RCOS telescope + STL11K camera + red filter at the New Mexico Skies Observatory near Mayhill, NM; position end figures 52s.29, 55".9); 14.529, 18.6 (Brimacombe; luminance filter; image posted at website URL http://www.flickr.com/photos/43846774@N02/6700504855/).