Bin Wang(Shaoxing, Zhejiang, China) and Xing Gao (Urumqi,Xinjiang,China), report the discovery of a possible supernova (mag approximately 16.7) on a 40-s survey image (limiting mag about 19.5)taken by Xing Gao in Xingming ObservationSky Survey(C42) around Sep.02.89655 UT. using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ). The new object approximately located at R.A. =08h 58m 52s.52 Decl.=+41o 35'00".1(equinox 2000.0). Which is about 25.9" east and 11.7" north of the center of the PGC 25224. Nothing is visible at this position on archival images taken on Oct. 21(limiting mag 19.0 )or on the DSS from Dec. 08,1989(limiting mag about 19.8).
NET USNO-A2.0
XM08BW C2013 10 31.85266 08 58 52.52 +41 35 00.1 16.7 V C42
All images can be seen from: http://www.xjltp.com/XOSS/XM08BW/XM08BW.htm
C42,Xingming Observatory,Mt. Nanshan. Observers B.Wang,X.Gao,Measurers B.Wang 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD

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Discovery image taken by C42 on Oct.31.85266 UT,2013

DSS IMAGE

archival image taken by C42 on Oct.21 ,2013