GCN Circular 30162
Subject
GRB 210610A: Xinglong-2.16m optical afterglow observations
Event
Date
2021-06-10T16:20:29Z (5 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu, Z.P. Zhu, S.Y. Fu, X. Liu (NAOC) report on behalf of a larger
collaboration:
We observed the field of GRB 210610A (Page et al., GCN 30160) using the
2.16-m optical telescope located at Xinglong, Hebei, China, equipped
with the BFOSC camera. Observations started at 15:28:02 UT on
2021-06-10, i.e., 24.25 min after the burst.
An uncatalogued and varying optical transient is detected at coordinates:
R.A. (J2000) = 13:37:07.60
Dec. (J2000) = +14:27:55.0
with an error radius of ~ 0.3 arsec, positionally being well consistent
with the Swift/UVOT detection (Page et al., GCN 30160). The OT is thus
the optical afterglow of the GRB, and it has r = 16.97 +/- 0.01 mag at
26.25 min post-burst, calibrated with the nearby PanSTAR field.
Spectroscopy of the afterglow is underway.