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POSSIBLE NOVA IN M31 – XM56MZ

Mi Zhang, Xing Gao (Xingming Observatory), report the discovery of a possible nova (mag approximately 17.9 on several 30-s survey image (limiting mag about 18.5) taken by Xing Gao at Xingming Observatory #2 (N89) around July. 26.87413 UTC using a unfiltered CCD ( 0.5-m f/4 reflector ). The transient approximately located at R.A.=00h42m45.42s +41d52’23”.3 (equinox 2000.0). Which is about 12.4″ east and 2174.8″ north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on July. 25.79365 (limiting mag 18.5) . Images can be found at: http://xjltp.china-vo.org/xm56mz.html

NET UCAC-4
XM56MZ C2021 07 26.87413 00 42 45.42 +41 52 23.3 17.9 V N89
XM56MZ C2021 07 27.88418 00 42 45.42 +41 52 23.4 17.9 V N89
XM56MZ C2021 08 01.88412 00 42 45.43 +41 52 23.5 17.8 V N89
XM56MZ C2021 08 02.78554 00 42 45.41 +41 52 23.3 17.8 V N89
XM56MZ C2021 08 02.88112 00 42 45.34 +41 52 22.6 17.8 V N88

Discovery image taken by N89 on July. 26.87413 UTC,2021 Archival image taken by N89 on July. 25.79365 UTC,2021 Confirm image taken by N88 on Aug. 02.88112 UT,2021 PS Image

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