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张宓 XM20MZ = AT2019vzu ? M31河外新星

POSSIBLE NOVA IN M31

Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.7) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Nov. 26.65780 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h42m51.76s +41d11’26”.6 (equinox 2000.0). Which is about 83.9″ east and 281.9″ south of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Nov. 19.56625 UT(limiting mag 21.0).
NET Gaia DR2
XM20MZ C2019 11 26.65780 00 42 51.76 +41 11 26.6 19.7R C42

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