GCN Circular 26603
Subject
GRB 191228A: UKIRT NIR upper limit
Event
Date
2019-12-28T07:36:11Z (6 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu, Z.P. Zhu, B.Y. Yu, H.J. Wang, L. Ge (NAOC) report:
We observed the field of GRB 191228A (Bernardini et al., GCN 26601)
using the 3.8-m United Kingdom Infra-Red Telescope (UKIRT). Observations
started at 04:38:02 UT on 2019-12-28 (i.e., 4.612 hr after the BAT
trigger), and 3600 s H-band imagining was obtained in a seeing of ~1.0".
No NIR afterglow is detected in the stacked image at the XRT position
(Bernardini et al., GCN 26601), down to a limiting magnitude of H ~
20.1, calibrated with nearby 2MASS stars.
We thank the great support of the UKIRT staff/observer, in particular
Michael Pohlen and Watson Varricatt.