2011CBET.2756....1P

A. Pelloni, J. Newton, and T. Puckett report the discovery of an apparent supernova (mag 17.5) on an unfiltered CCD image (limiting mag 19.0) taken with a 0.35-m reflector at Portal, AZ, U.S.A., on June 24.3395 UT in the course of the Puckett Observatory Supernova Search. The new object, which was confirmed at mag 16.9 on June 27.3391 by Puckett with the 40-cm reflector at Portal, is located at R.A. = 16h31m39.45 Decl. = +41:29:22.9 (equinox 2000.0), which is 17".3 east and 14".0 south of the center of PGC 58436. Nothing is visible at this position on images taken by Puckett on 2011 June 9 (limiting mag 19.1). The variable was designated PSN J16313945+4129229 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011dw based on the spectroscopic report below. Puckett has posted a finder image for 2011dw at website URL http://possdata.com/PSNJ16313945+4129229.jpg.