GCN Circular 41349
Subject
EP250812a: Nickel optical upper limit
Event
Date
2025-08-13T18:18:02Z (7 days ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
email
Andreas Betz, Riley Patlak, WeiKang Zheng and Alex Filippenko
(UC Berkeley) report on behalf of the KAIT GRB team:
We observed the field of EP250812a (Zhang et al., GCN 41327)
with the 1-m Nickel telescope located at Lick observatory,
California. Observations were performed in the R band with
600s x 5 exposures. In our coadd image, we do not detect the
optical counterpart (Xin et al., GCN 41340; Ducoin et al.,
GCN 41342) with an upper limit of R > 20.7 (Vega) at a
mid-time of 23.8 hours after the trigger.