2012CBET.3234....2L

Simone Leonini, Siena, Italy, reports the independent discovery by G. Guerrini, P. Rosi, D. Soldateschi, L. M. Tinjaca Ramirez, and himself of this apparent supernova at mag about 15.5 on an unfiltered CCD image (limiting mag about 18.0) taken on Sept. 10.9097 UT at the 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). The new object is located at R.A. = 1:18:46.05, Decl. = +14:59:39.9 (equinox 2000.0), which is 2" east and 3" north of the nucleus of the galaxy UGC 838. Nothing is visible at this position on Palomar Sky Survey red and blue plates (1987 Aug. 24, N plate; 1989 Nov. 4, J plate; 1994 Dec. 1, F plate) to limiting mag about 19.5. Leonini notes that their discovery image is posted at URL http://www.astrofilisenesi.it/public/Sne/Uploads/PSN_in_UGC00838.jpg; their confirming image can be viewed at URL http://tinyurl.com/9bg5bgy. Additional CCD magnitudes for 2012ex: 2012 Feb. 1.13 UT, [19.0 (CSS); Aug. 24, [18.5 (Leonini et al.); Sept. 16.962, 17.8 (Leonini et al.; limiting mag 18.5); Sept. 17.371, 17.7 (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 45s.97, 40".2); 18.067, 17.8 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.38-m f/6.8 reflector; position end figures 46s.08, 39".3; reference stars from CMC-14 catalogue). Brimacombe's image posted at the following URL: http://www.flickr.com/photos/43846774@N02/7998673206/. Luppi's image is posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_U838.jpg).