GCN Circular 29401
Subject
GRB 210205A: Nanshan/NEXT optical upper limit
Date
2021-02-05T16:20:03Z (3 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
S.Y. Fu (NAOC), Z.P. Zhu (HUST,NAOC), X. Liu, D. Xu (NAOC), X. Gao
(Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 210205A (Dichiara et al., GCN 29397) using
the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained
3x40 s, 4x60 s, 12x90 s frames in the Sloan r-band, starting at 12:09:46
UT on 2021-02-05, i.e., 58.5 min after the BAT trigger.
No optical source is detected in our stacked image at the enhanced XRT
position (Osborne et al., GCN 29399), down to a limiting magnitude of
r~19.9, calibrated with the nearby PanSTARRS field.