张宓 XM25MZ = AT 2020bmf ? M81河外新星

POSSIBLE NOVA IN M81
Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.8) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Jan. 31.00812 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=09h55m48.42s +69d07’32”.5 (equinox 2000.0). Which is about 81.8″ east and 217.4″ north of the center of the M81. Nothing is visible at this position on archival images taken on Jan. 28.58455 UT(limiting mag 20.0).
NET UCAC-4
XM25MZ C2020 01 31.00812 09 55 48.42 +69 07 32.5 19.8R C42
All images can be seen from: http://xjltp.china-vo.org/XM25MZ.html
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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