TITLE:   GCN CIRCULAR
NUMBER:  32027
SUBJECT: GRB 220511A: BOOTES-2/TELMA optical upper limit
DATE:    22/05/12 09:07:40 GMT
FROM:    Youdong HU at IAA-CSIC  <huyoudong072@hotmail.com>

Y.-D. Hu, E. Fernandez-Garcia, T.-R. Sun, A. J. Castro-Tirado, M.D. Caballero-Garcia, R. Sanchez-Ramirez, I. Perez-Garcia (IAA-CSIC), C. Perez del Pulgar, A. Castellon, M. A. Castro Tirado (Univ. de Malaga), R. Fernandez-Munoz (IHSM/UMA-CSIC) and M. Jelinek (ASU-CAS), on behalf of a larger collaboration, report:

Following the detection of GRB 220511A by Fermi (GBM team GCNC 32018), AGILE (Ursi et al. CNCN 32021) and Swift (DeLaunay et al. GCNC 32023), the 0.6m BOOTES-2/TELMA robotic telescope in Algarrobo Costa (Malaga, Spain) pointed to the Swift/BAT-GUANO position on May. 11 at 22:48:06 UT (~9.1 hrs after trigger). No new source is detected in a 11' x 11' FOV within the BAT-GUANO error region in the co-added image (60 x 10 s, clear filter) down to 18.7 mag. This non-detection is consistent with the MASTER results (Lipunov et al. GCNC 32022).

We thank the staff at IHSM/UMA-CSIC La Mayora for its excellent support.