POSSIBLE SUPERNOVA IN NGC 5020
Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag 17.5 at discovery mag) on two 40-s survey images(limiting mag about 19.5)taken by Xing Gao in Xingming ObservationSky Survey(C42) around Jan. 18.90494 and Jan. 19.89860 UT, 2015. using an unfilted CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ).the new object approximately located at R.A. =13h 12m 41s.16 Decl.=+12 36 01.8(equinox 2000.0). Which is about 14.5″ east and 2.7″ north of the center of the NGC 5020.
Nothing is visible at this position on archival images taken on Dec.25,2014. (limiting mag 19.5) nor on the DSS(POSS2/UKSTU Red) from May. 07,1997(limiting mag about 19.8)
XM51ZJ C2015 01 18.90471 13 12 41.13 +12 36 01.6 17.5 V C42
XM51ZJ C2015 01 19.89860 13 12 41.16 +12 36 01.8 17.4 V C42
All images can be seen from: http://www.xjltp.com/XOSS/XM51ZJ/XM51ZJ.htm
C42,Xingming Observatory, Mt. Nanshan. Observers Z.Jin, X.Gao ,Measurers Z.Jin 0.35-m f/6.9 Schmidt-Cassegrain telescope and CCD.
Discovery image taken by C42 on Jan.18 & Jan.19 ,2015