TITLE: GCN CIRCULAR NUMBER: 32935 SUBJECT: GRB 221110A: COATLI Second-Epoch Upper Limits DATE: 22/11/11 21:03:17 GMT FROM: Alan M Watson at UNAM Alan M. Watson (UNAM), Nat Butler (ASU), Rosa Becerra (UNAM), Simone Dichiara (PSU), Tzveti Dimitrova (ASU), Oc��lotl L��pez (UNAM), Diego Gonz��lez (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Margarita Pereyra (UNAM), and Eleonora Troja (UTV/ASU) report: We observed the field of the GRB 221110A (Williams et al., GCN Circ. 32925) with the COATLI 50-cm telescope and HUITZI f/8 imager at the Observatorio Astron��mico Nacional on the Sierra de San Pedro M��rtir ( http://coatli.astroscu.unam.mx) from 2022-11-11 03:28 UTC to 09:01 UTC (25.0 to 30.6 hours after the trigger), obtaining a total of 270 minutes of exposure in the r filter. The source detected in our earlier observations (Pereyra et al., GCN Circ. 32927 has now faded and is not detected to a 3-sigma limit of r > 22.6 Our photometry is calibrated against the Pan-STARRS1 catalog, is on an approximate AB system, and is not corrected for Galactic extinction in the direction of the GRB. We thank the COATLI/HUITZI technical team and the staff of the Observatorio Astron��mico Nacional.