2012CBET.3092....1N

S. Nakano, Sumoto, Japan, reports the discovery by Masaki Tsuboi (Kuchita-minami, Asakita-ku, Hiroshima, Japan) of an apparent supernova (mag 15.7) on a 30-s unfiltered CCD frame (limiting magnitude 18.1) taken on Apr. 8.751 UT using a 0.25-m f/4.7 reflector (+ ST-2000XM camera), which was then confirmed on an earlier frame taken one day before discovery (limiting mag 18.3). Tsuboi's position for the new object (averaged from the two images) is R.A. = 19:21:30.34 ± 0s.14, Decl. = +61:08:10.8 ± 0".7 (equinox 2000.0), which is 4".3 west and 32".2 south of the center of NGC 6796. Tsuboi adds that nothing is visible at this position on the Digitized Sky Survey (limiting red mag 19 or fainter). The variable was designated PSN J19213020+6108101 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012bv based on the spectroscopic confirmation reported below. Additional CCD magnitudes reported for 2012bv (unfiltered unless noted otherwise): 1991 Sept. 1, [18.0 (Digitized Sky Survey, red plate; via T. Yusa, Osaki, Japan); 2012 Mar. 28.781, [19.0 (Tsuboi); Apr. 1.817, [18.6 (Tsuboi); 7.722, 16.2 (Tsuboi); 9.436, 15.8 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 reflector + Apogee AP-47p camera; limiting mag 17.5; position end figures 30s.31, 11".2; UCAC3 reference stars; 9.400, 15.1 (L. Elenin, Lyubertsy, Russia; and I. Molotov, Moscow, Russia; images remotely taken at the ISON-NM Observatory near Mayhill, NM, USA, with a 0.45-m f/2.8 telescope; position end figures 30s.40 ± 0".12, 12".1 ± 0".13; NOMAD reference stars; limiting mag about 19.2; image posted at website URL http://spaceobs.org/images/TOCP/PSNJ19213020+6108101-20120409.png); 9.579, 15.0 (T. Noguchi, Katori, Chiba-ken, Japan; 0.23-m f/6.3 reflector + BITRAN BT-11E camera; limiting mag 18.0; position end figures 30s.36, 12".0; offset 4".1 west and 30".6 south; communicated by Nakano); 9.675, 15.8 (K. Itagaki, Yamagata, Japan; 0.60-m f/5.7 reflector; position end figures 30s.35, 11".4; image posted at website URL http://www.k-itagaki.jp/images/6796.jpg); 9.709, 15.6 (K. Kadota, Saitama-ken, Japan; 0.25-m f/5.0 reflector; position end figures 30s.38, 11".9); 10.429, 16.1 (Joseph Brimacombe, Cairns, Australia; luminance filter; position end figures 30s.28, 10".8); 12.366, 16.1 (T. Yusa, Osaki, Japan; remotely using the "iTelescope T5" 0.25-m f/3.4 astrograph + SBIG ST-10XME camera near Mayhill; position end figures 30s.35, 11.3; UCAC-3 reference stars; limiting magnitude 19.5). Yusa's image is posted at website URL http://space.geocities.jp/yusastar77/supernova/PSNinNGC6796_120412.htm.