GCN Circular 29235
Subject
GRB 210104A: GWAC-F60A optical afterglow observations
Event
Date
2021-01-04T12:00:26Z (5 years ago)
From
Liping Xin at NAOC, SVOM <xlp@nao.cas.cn>
L. P. Xin(NAOC), J. Wang(GXU), X. H. Han(NAOC), J. Y. Wei(NAOC),
G. W. LI(NAOC), L. H. Li(NAOC), C. Wu(NAOC), X. G. Wang(GXU),
E. W. Liang (GXU), R. S. Zhang(NAOC), Y. L. Qiu(NAOC),
and J. S. Deng(NAOC) report:
We began to observe GRB 210104A (Troja et al., GCN 29233)
with Xinglong GWAC-F60A telescope, China,
at 11:28:00 (UT), 4th. Jan. 2021, about 61 sec after the burst.
A series of R, I, and B band images were obtained.
The optical afterglow (Troja et al., GCN 29233)
was clear detected in our images.
The brightness is about 14.5 mag in R band at 71 sec after the burst,
calibrated to the USNO B1.0 catalog.
The observations are continuing