POSSIBLE SUPERNOVA IN NGC 7042
Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag approximately 17.1) on tow 40-s survey images (limiting mag about 19.0)taken by Xing Gao in Xingming ObservationSky Survey(C42) around Oct .22.6303 and Oct.21.6928 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. =21h 13m 44s.81 Decl.=+13o 4’33”.5(equinox 2000.0). Which is about 11.2″ west and 3.5″ north of the center of the NGC7042.
Nothing is visible at this position on archival images taken on Oct.19,2013. (limiting mag 19.2) or on the DSS(POSS2/UKSTU Red) from Aug. 14,1991(limiting mag about 19.8)
NET USNO-A2.0
XM46ZJ C2013 10 22.63031 21 13 44.81 +13 34 33.5 17.1 V C42
All images can be seen from: http://www.xjltp.com/XOSS/XM46ZJ/XM46ZJ.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.
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Discovery image taken by C42 on Oct.22.63031 UT,2013 & Oct.21.6928 UT,2013
DSS IMAGE
archival image taken by C42 on Oct.19 ,2013 & Oct.8 ,2013