GCN Circular 43138
Subject
EP251214b: KAIT optical upper limit
Event
Date
2025-12-16T08:38:39Z (12 hours ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
email
WeiKang Zheng (UCB), Xuhui Han (NAOC), Pinpin Zhang (NAOC) and
Alexei V. Filippenko (UCB) report on behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at
Lick Observatory, observed the field of EP251214b (Jiang et al.,
GCN 43125) starting at 08:17, Dec 14 UT, about 0.95 hours after
the trigger. A set of 29x60s and again 40x60s clear (roughly R)
filter images were obtained. In our coadd images, we did not detect
any new source within the EP-WXT error circle (Jiang et al., GCN
43125) down to limiting mag of 20.8 and 21.5 mag (Vega) at a
mid-time of 1.23 and 3.12 hours after the trigger. Our result is
consistent with the upper limit reported by other groups
(Eyles-Ferris et al., GCN 43117; Lipunov et al., GCN 43127).