GCN Circular 22090
H.J. Tan (CCU), Z.P. Zhu, H.X. Feng, D. Xu (NAOC), Y.D. Hu (IAA-CSIC), X. Gao (Urumqi No.1 Senior High School) report: We observed the field of GRB 171102B (Ukwatta et al., GCN 22082) using the 0.36m and 0.60m telescopes located at Nanshan, Xinjiang, China. All imaged were taken without filter. Our photometry was summarized as follows: ======================================== Tmid(s)+T0 Telescope Exptime(s) UL(R) 389 36cm 40*3 >16.10 645 60cm 30*3 >17.80 1365 60cm 60*15 >18.55 ======================================== Note: (1) Photometry is calibrated with stars (R2 magnitude) in the USNO B1 catalogue, although images were taken without filter.