Hanjie Tan (AUUK), Mi Zhang, Guoyou Sun, Jiangao Ruan, Jingyuan Zhao (Xingming Obs), Quanzhi Ye (UMd), Xing Gao (Xingming Obs), report the discovery of a micro-lensing candidate at 16.83 Gmag on several 60-s survey images (limit mag about 18.5) taken by Xing Gao at Xingming Observatory “#”3 (N88) around 2022 Jan.10.76080 UTC using unfiltered CCD and PAT telescope (0.3-m f/3.6 reflector). The transient is approximately located at RA= 06h03m44.17s,DEC = +21d21m48.3s (equinox 2000.0). The source appears to correspond to object Gaia DR2 3423389960580175360 (G=18.59) in the Gaia DR2. Discovery images can be found at: http://xjltp.china-vo.org/xm95ht.html
Wenjie Zhou and Guoyou Sun did the further study.
NET Gaia DR2
XM95HT C2022 01 10.76080 06 03 44.17 +21 21 48.3 16.83+-0.06G N88
XM95HT C2022 01 10.77163 06 03 44.15 +21 21 48.5 16.90+-0.06G N88
The source has TWO brightenings spaced by ~2500 d. recorded both by ASAS-SN and WISE. The well-covered 2021 brightening shows an assymetric shape.
Fitting ztf data with lens model (pspl) – by Subo Dong
Brightenings in 2015 and 2021 recorded by WISE W1+W2.