GCN Circular 41586
Subject
EP250828a: KAIT optical upper limit
Event
Date
2025-08-29T06:16:36Z (a month 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 EP250828a (Liu et al.,
GCN 41574) starting at 09:30, Aug 28 UT, about 1.97 hours after
the burst. A set of clear (roughly R) filter images were obtained.
In our coadd image, we did not detect the reported afterglow
(Taguchi et al., GCN 41582; Yao et al., GCN 41583; Fu et al., GCN
41584) down to a limiting mag of 20.5 mag (Vega) at a mid-time of
2.67 hours after the burst.