GCN Circular 26860
Subject
GRB 200122A: Xinglong-2.16m optical upper limit
Date
2020-01-23T01:24:01Z (4 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
X. Liu, D. Xu, H.J. Wang, Z.P. Zhu, B.Y. Yu (NAOC) report:
We observed the field of GRB 200122A (Sonbas et al., GCN 26844) using
the Xinglong-2.16m telescope equipped with the BFOSC camera.
Observations started at 22:14:52 UT on 2020-01-22 (i.e., 20.57 h after
the BAT trigger), and 5x200 s R-band frames have been obtained.
No optical afterglow is detected at the Swift XRT's position in our
stacked image, down to a limiting magnitude of m(R) ~ 22.0, calibrated
with the nearby PanSTARRS field.