2012CBET.3077....1P

T. Puckett and J. Newton report the discovery of an apparent supernova (mag 17.1) on an unfiltered CCD image (limiting mag 19.1) taken with a 0.40-m reflector at Portal, AZ, U.S.A., on Mar. 27.245 UT in the course of the Puckett Observatory Supernova Search. The new object, which was confirmed at mag 17.0 on Mar. 28.429 by Puckett with the same instrumentation at Portal, is located at R.A. = 13:05:45.66, Decl. = +46:27:52.9 (equinox 2000.0), which is 11".0 west and 10".4 north of the center of UGC 8189. Nothing is visible at this position on images taken by Puckett on Mar. 11 (limiting mag 19.0). An image is posted at URL http://www.possdata.com/PSNJ13054566+4627529.jpg. The variable was designated PSN J13054566+4627529 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012bm based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012bm: Mar. 27.809, 16.5 (Nick James, Chelmsford, Essex, England; Celestron 11 telescope + ST9XE camera; red magnitude cited; position end figures 45s.64, 52".2); 28.018, 17.0 (Massimiliano Martignoni, Magnago, Italy; 25-cm f/10 Schmidt-Cassegrain telescope; V bandpass cited).