Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J23150258+3916331

TCP J23150258+3916331   2021 10 29.7061*  23 15 02.58 +39 16 33.1  15.0 G             And       R 9

2021 10 29.7061

Hanjie Tan (Astronomical Institute of Charles University), Jiangao Ruan, Guoyou Sun, Mi Zhang, Jingyuan Zhao (Xingming Observatory), Quanzhi Ye (Department of Astronomy, University of Maryland), Xing Gao (Xingming Observatory), report a variable star candidate (G=15.00+-0.01, 29.70609 UT; G=17.89+-0.08, 29.68900 UT). The source appears to correspond to object Gaia DR2 1918003515312607616 (G=17.38) in the Gaia DR2. Discovery was made on several 120-s survey images (limiting mag about 19.0) taken by Xing Gao at Xingming Observatory #3 (N88) around Oct. 29.70609, 2021 UT using a unfiltered CCD (0.3-m f/3.6 reflector). Images can be found at: http://xjltp.china-vo.org/xm81ht.html

2021 11 02.5876

Follow-up observations were performed by Xing Gao at Xingming Observatory #3 (N88) around Nov. 02.58632, 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 17.47+-0.03G, 02.58632 UT; 17.50+-0.03G, 02.58759 UT. The candidate likely to be an UV star.