POSSIBLE SUPERNOVA IN PGC 20784

Peiyuan Sun (Weifang, Shandong, China), Zhangwei Jin (Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag approximately 17.6) on a 40-s survey images (limiting mag about 19.5) taken by Xing Gao in Xingming ObservationSky Survey (C42) around Nov.16.84411 UT,2013. using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ). the new object approximately located at R.A. =07h 21m 31s.65 Decl.=+55 °45’32”.1 (equinox 2000.0). Which is about 3.6″ west and 7.5″ north of the center of the PGC 20784.

Nothing is visible at this position on archival images taken on Nov.07,2013.(limiting mag 19.2) and Nov.05,2013.(limiting mag 19.0) or on the DSS(POSS2/UKSTU Red) from Dec.05,1989(limiting mag about 19.8).

NET USNO-A2.0
XM01PS C2013 11 16.84411 07 21 31.65 +55 45 32.1 17.6 V C42
XM01PS C2013 11 26.95668 07 21 31.68 +55 45 32.5 17.1 V C42

All images can be seen from: http://www.xjltp.com/XOSS/XM01PS/XM01PS.htm

C42,Xingming Observatory,Mt. Nanshan. Observers P.Sun,Z.Jin,X.Gao,Measurers P.Sun,Z.Jin 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.

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