GCN Circular 42640
Subject
GRB 251111A: KAIT optical upper limit
Event
Date
2025-11-11T08:13:13Z (a day 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, automatically responded to the SVOM GRB
251111A (Cheng et al., GCN 42637) starting at 05:12:13, 115 seconds
after the burst. Observations were performed in 3 x 3 tiling mode,
and a set of clear (roughly R) filter images were obtained. The first
image covered the reported afterglow (López-Cámara et al., GCN 42638;
Wu et al., GCN 42639) position was at 05:14:50, 272 seconds after
the burst. We did not detect the afterglow in our clear images with
the following upper limit:
mid t-t0(s) exp(s) UL(mag)
---------------------------
282 20 >18.5
561 20 >18.5
763 20 >18.5
1042 20 >18.5
1323 20 >18.5
1690 40 >19.0
2156 40 >19.0
2613 40 >19.0
3168 60 >19.5
3813 60 >19.5
4442 60 >19.5