2011CBET.2761....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), report the discovery of an apparent supernova (red magnitude 16.4) on three CCD images (limiting mag about 20.0) taken on June 26.946, 26.956, and 26.967 UT with a 0.45-m telescope. The new object is located at R.A. = 16:12:44.82, Decl = +28:17:03.2 (equinox 2000.0), which is 0".2 east and 4".8 south of the nucleus of the presumed host galaxy, UGC 10273. The variable was designated PSN J16124482+2817032 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011dz based on the spectroscopic report below. Additional approximate magnitudes for 2011dz supplied by Vida, from unfiltered images LSSS unless otherwise noted: 1989 May 3.293, [22 (Digitized Sky Survey, red plate); 2010 May 19.979, [20 (LSSS); 20.954, [20 (LSSS); 2011 April 2.035, [20 (LSSS); June 27.883, 16.4 (LSSS, red). All LSSS images from 2010 May to 2011 June have been posted (with the red DSS image on the right) at the following website URL: http://img89.imageshack.us/img89/1737/ugc10273archive.png; the June 26 images are posted at http://img819.imageshack.us/img819/3272/ugc10273candidate.png.