TITLE: GCN CIRCULAR NUMBER: 13323 SUBJECT: GRB 120521C: BOOTES-1 optical observations DATE: 12/05/22 01:53:37 GMT FROM: Javier Gorosabel at IAA-CSIC M. Jelinek (IAA-CSIC), P. Kubanek (IP AS CR), A.J. Castro-Tirado (IAA-CSIC), J. Gorosabel (IAA-CSIC), report on behalf of a larger collaboration: "The 0.3-m robotic telescope at the BOOTES-1 station in south Spain (INTA-CEDEA) responded automatically to GRB 120521C (Baumgartner et al., GCN Circ. 13318), performing clear-band observations on May 21.98180 -- 21.98863 UT (11.7 -- 21.5 minutes post burst). No object is detected within the XRT circle down to R~20.5"