GRB 210722A: Nanshan/NEXT further optical observations
Abstract
We continued to observe the field of GRB 210722A (D'Avanzo et al., GCN 30475) using the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 15x200 s frames in the Sloan r-band, starting at 20:41:20 UT on 2021-07-24, i.e., 1.99 days after the burst. The previously reported optical afterglow (e.g., D'Avanzo et al., GCN 30475; Zhu et al., GCN 30476) is not detected in our stacked image, down to a limiting magnitude of r~21.0, calibrated with the nearby PanSTARRS field.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2021
- Bibcode:
- 2021GCN.30504....1F