POSSIBLE SUPERNOVA IN PGC 2263191
Shulei Yin,Weizhaohuang Song,Mi Zhang,Ang Li,Yang Shen,Yanxi Li,Cheng Ji,Yingbin Nie,Yuxi Lv,Xinzhong Cai,Jiangao Ruan and Xing Gao, report the discovery of a possible supernova (mag approximately 17.4) on one 40-s survey image (limiting mag about 19.0) taken by Xing Gao in Xingming Observation Sky Survey (C42) around Apr.25.60477 UT. Using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9). The new object approximately located at R.A.=06h 58m 54s.98 Decl.=+45 19 56.5 (equinox 2000.0). Which is about 4.3″ east and 2.5″ south of the center of the PGC2263191.
Nothing is visible at this position on archival images taken on Apr.18,2016 (limiting mag 19.0), or on the DSS (POSS-II N) from Nov.03,1996 (limiting mag about 19.5).
PSP16I C2016 04 25.60477 06 58 54.98 +45 19 56.5 17.4 V C42
All images can be seen from: http://www.xjltp.com/XOSS/PSP16I/PSP16I.htm
C42,Xingming Observatory,Mt. Nanshan. Observers S.Yin,W.Song,M.Zhang,A.Li,Y.Shen,Y.Li,C.Ji,Y.Nie,Y.Lv,X.Cai,J.Ruan,X.Gao,Measurer C.Ji 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
Discovery image taken by C42 on Apr.25.60477 UT,2016
Archival images taken by C42 on Apr.18 UT,2016