2011CBET.2695....1V

Denis Vida, on behalf of the "La Sagra Sky Survey" (LSSS) Supernova Search Team (which also includes Filip Novoselnik, Ivica Skokic, David Gostinski, Robert Gregic, Salvador Sanchez, Jaime Nomen, Reiner Stoss, Bill Yeung, Juan Rodriguez, and Miguel Hurtado), reports the discovery of an apparent supernova (red magnitude 17.0) on three CCD images (limiting mag about 20.0) taken on Apr. 4.98, 4.991, and 5.002 UT with a 0.45-m telescope. The new object is located at R.A. = 12:56:53.89, Decl = +22:22:28.2 (equinox 2000.0), which is 5".8 east and 3".1 north of the nucleus of the presumed host galaxy (IC 3917 = IC 3918). The variable was designated PSN J12565389+2222282 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011bm based on the spectroscopic report below. Additional approximate CCD unfiltered magnitudes for 2011bm: Jan. 13.133, [20 (LSSS); Feb. 3.06, [20 (LSSS); 4.092, [20 (LSSS); Apr. 10.072, 16.5 (D. Rich, Hampden, ME, U.S.A., 0.41-m f/5.6 reflector; position end figures 53s.94, 27".9); 10.383, 16.1 (J. Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope at New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end figures 53s.89, 27".6). The LSSS images (from Jan. 13 to April 4) have been posted (with a red Digitized Sky Survey image on the right) at the following website URL: http://img717.imageshack.us/img717/276/ic3917archive.png; also, three images taken on the night of Apr. 4 have been posted at the following website URL: http://img857.imageshack.us/img857/4702/ic3917confirmation.png. Brimacombe's image is posted at http://www.flickr.com/photos/43846774@N02/5605348297/. The type-Ia supernova 2007bz also appeared in this galaxy (cf. CBETs 941, 943).