TITLE: GCN CIRCULAR NUMBER: 23886 SUBJECT: GRB 190211A: BOOTES-4/MET optical afterglow confirmation DATE: 19/02/11 19:23:23 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia Y.-D. Hu, X.-Y.Li, E. Fernandez-Garcia, A. Ayala, A. J. Castro-Tirado (IAA-CSIC), C. Perez del Pulgar, A. Castellon, I. Carrasco (Univ. de Malaga),  S. Guziy (Univ. of Nikolaev) and D. Xiong, Y. Fan, X. Zhao, J. Bai, C. Wang, Y. Xin (Yunnan Nacional Astronomical Observatory), on behalf of a larger collaboration, report: "Following the detection of GRB 190211A by Swift/BAT (Marshall et al. GCNC 23883), the 0.6m BOOTES-4/MET robotic telescope at Lijiang Astronomical Observatory (China) obtained follow-up  observations starting at 17:10 UT (~0.26 hr after trigger). The optical afterglow is detected within the Swift/XRT error box with a preliminary magnitude of 19.1 mag (clear filter), thus confirming the fading in brightness of the optical source earlier reported by Xu et al. (GCNC 23884). Observations are ongoing."