Yingbin Nie, Wenjie Zhou, Mi Zhang, Jiangao Ruan, Jingyuan Zhao, Jianlin Xu, Yanxi Li, Yi Ding, Guoyou Sun, Xing Gao (Xingming Observatory), report the discovery of an UV candidate (17.25+-0.03G). The source appears to correspond to object Gaia EDR3 387456593274427904 (19.37 G) in the Gaia EDR3. Discovery was made on one 30-s survey image (limiting mag about 19.0) taken by Xing Gao around 2021 Nov 14.59189 UT at Xingming Observatory #2 (N89) using a unfiltered CCD (0.5-m f/4 reflector). Images can be found at: http://xjltp.china-vo.org/psp21ai.html
Follow-up observations were performed by Xing Gao at Xingming Observatory #3 (N88) around Nov. 14.65875, 2021 UT using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). Several 90-s survey images (limiting mag about 21.0) showed that the candidate has decreased to 19.32+-0.08G, 14.65875 UT; 19.35+-0.09G, 14.66002 UT. The candidate likely to be an UV star.
NET Gaia DR2
PSP21ai C2021 11 14.59189 00 44 43.94 +42 52 31.7 17.25G N89
PSP21ai C2021 11 14.65875 00 44 44.04 +42 52 31.0 19.32G N88
PSP21ai C2021 11 14.66002 00 44 44.04 +42 52 31.0 19.35G N88
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| Discovery image taken by N89 around 2021 Nov. 14.59189 UT | Follow-up image taken by N88 around 2021 Nov. 14.65875 UT | Archival image taken by N89 around 2021 Nov. 12.63581 UT | PS image |