POSSIBLE NOVA IN M31

Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 16.7) on severl 300-s survey images (limiting mag about 20.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around May. 24.82138 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h42m21.98s +41d23’58”.4 (equinox 2000.0). Which is about 251.9″ west and 469.9″ north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on May. 20.86668 UT(limiting mag 19.0).

NET UCAC-4
XM11MZ C2019 05 24.82138 00 42 21.98 +41 23 58.4 16.7V C42

All images can be seen from: http://www.xjltp.com/XOSS/XM11MZ/XM11MZ.htm
C42,Xingming Observatory – NEXT, Mt. Nanshan. Observers M.Zhang,X.Gao,Measurers M.Zhang, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

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