POSSIBLE NOVA IN M31Jiangao Ruan(Fangchenggang, Guangxi, China) and Xing Gao (Urumqi, Xinjiang, China)，report the discovery of a possible nova (mag approximately 17.8) on several 60-s survey images (limiting mag about 19.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Oct. 13.55657 UT using a unfilled CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). the new object approximately located at R.A.=00h44m26s.6 Decl.=+41°31’13”.4 (equinox 2000.0). Nothing is visible at this position on archival images taken on Oct. 11.55495 (limiting mag 19.0) and Oct 12.62543 (limiting mag 19.0) or on the DSS(POSS-II Red) from 1986-11-27(limiting red mag 20.8).
All images can be seen from: http://www.xjltp.com/XOSS/XM10AG/XM10AG.htm
NET USNO-B1.0
XM10AG C2010 10 13.55657 00 44 26.59 +41 31 13.4 17.8 C C42
XM10AG C2010 10 13.59646 00 44 26.54 +41 31 13.9 17.5 C C42
XM10AG C2010 10 13.59816 00 44 26.54 +41 31 13.8 17.6 C C42
C42 Xingming Observatory, Mt. Nanshan. Observers J.Ruan,X.Gao ,Measurers J.Ruan. 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
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taken by C42（LM=19.0） DSS IMAGE RED(LM=20.8)
GIF IMAGE