GCN Circular 29607
Subject
GRB 210306A: NEXT optical observations
Event
Date
2021-03-07T04:10:04Z (5 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Z.P. Zhu (NAOC, HUST), S.Y. Fu, X. Liu, D. Xu (NAOC), X. Gao (Urumqi
No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 210306A (D'Elia et al., GCN 29597) using
the NEXT-0.6m optical telescope located at Nanshan, Xinjiang, China.
Observations started at 16:11:33 UT on 2021-03-06, i.e., 12.29 hr after
the BAT trigger. We obtained 15x200 s frames in the Sloan r-filter.
The previously reported optical afterglow (e.g., D'Elia et al., GCN
29597; Watson et al., GCN 29598; Romanov F., GCN 29599; Strausbaugh et
al., GCN 29600; Hentunen et al., GCN 29603; Stecklum et al., GCN 29604)
is clearly detected in our stacked image, with r = 21.0 +/- 0.1 mag at
12.76 hr post-burst, calibrated with nearby PS1 stars.