GRB 221110A: COATLI Second-Epoch Upper Limits
Abstract
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 Astronómico Nacional on the Sierra de San Pedro Mártir ( 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 Astronómico Nacional.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2022
- Bibcode:
- 2022GCN.32935....1W