POSSIBLE SUPERNOVA IN PGC 55040

Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag approximately 17.9) on a 40-s survey image (limiting mag about 18.2)taken by Xing Gao in Xingming ObservationSky Survey(C42) around Feb .17.93912 UT,2012. using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ).the new object approximately located at R.A. =15h 25m 08s.52Decl.=+37<57'49".4(equinox 2000.0). Which is about 30.9" east and 12.9" north of the center of the PGC 55040.

Nothing is visible at this position at this position on archival images taken on Feb.11 (limiting mag 19.0) or on the DSS(POSS2/UKSTU Red) from Apr. 17,1993(limiting mag about 19.8)

NET UCAC-3

XM37ZJ C2012 02 14.91505 15 25 08.46 +37 57 49.4 18.7 V C42

XM37ZJ C2012 02 16.91447 15 25 08.49 +37 57 49.9 18.0 V C42

XM37ZJ C2012 02 17.93912 15 25 08.52 +37 57 49.4 18.2 V C42

All images can be seen from: http://www.xjltp.com/XOSS/XM37ZJ/XM37ZJ.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 Feb.17.93912 UT,2012LM=19.5,40Sand Feb.14.91505 UT,2012LM=19.5,40S

             DSS IMAGE

                   

archival image taken on 2011.Mar. 4 and 2012.Feb.11