2009CBET.1844....1N

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata) of an apparent supernova (mag 16.1) on eight 20-s unfiltered CCD frames (limiting magnitude 19.0) taken on June 15.607 UT using a 0.60-m f/5.7 reflector. Itagaki then found a pre-discovery image taken on June 9.624 UT, showing 2009gf at mag 17.7. The new object is located at R.A. = 14:15:37.11 ± 0".01, Decl. = +14:16:48.6 ± 0".1 (equinox 2000.0; average of images on two nights), which is 31" west and 8".5 south of the center of NGC 5525. Nothing is visible at this position on Itagaki's many past frames (limiting mag 19.0), including the most recent image taken on 2009 June 1.591 (limiting mag 18.5), or on the Digitized Sky Survey.