GRB 210822A: Nanshan/NEXT optical observations
Abstract
We observed the field of GRB 210822A (Page et al., GCN 30677) using the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 15x100 s frames in the Sloan r-band and 10x100 s frames in the V-band, starting at 14:42:53 UT on 2021-08-22, i.e., 5.41 hr after the BAT trigger. The optical afterglow (e.g., Page et al., GCN 30677; Zheng & Filippenko, GCN 30679) of the burst is clearly detected in our stacked images. Preliminary photometry results are as follows: Tmid (UT) Tmid-T0(day) Mag MagErr Filter 2021-08-22T14:58:04 0.236 18.53 0.06 r 2021-08-22T15:54:29 0.275 18.88 0.08 V calibrated with nearby PanSTARRS stars.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2021
- Bibcode:
- 2021GCN.30684....1F