GRB 220921A: DDOTI Detection of the Afterglow
Abstract
We observed the field of the Fermi/LAT GRB 220921A (Pillera et al., GCN Circ. 32568) with the DDOTI wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Martir (http://ddoti.astroscu.unam.mx) from 2022-09-23 11:51 to 12:24 UTC (48.75 to 49.30 hours after the trigger) obtaining 2040 seconds of exposure. At the position of the OT detected by MASTER-Net (Lipunov et al., GCN Circ. 32570) we detect a source with w = 19.31 +/- 0.13. We calibrate our photometry against the APASS catalog. The afterglow has continued to fade from the observations reported by Lipunov et al. (GCN Circ. 32570) and de Wet et al. (GCN Circ. 32572). We thank the staff of the Observatorio Astronómico Nacional in San Pedro Martir.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- September 2022
- Bibcode:
- 2022GCN.32576....1W