TITLE: GCN CIRCULAR NUMBER: 38916 SUBJECT: EP250111a: KAIT optical observations DATE: 25/01/12 05:08:43 GMT FROM: Weikang Zheng at UC Berkeley weikang@berkeley.edu

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 EP250111a (Zhao et al.,

GCN 38905) starting at 02:53:32 UT on 2025-01-11, ~1.55 hr after

the trigger. A set of clear (roughly R) band images were obtained.

We marginally detect the optical afterglow (Fu et al., GCN 38906;

Pankov et al., GCN 38913) in the 11x60s coadd image and measure

its brightness to be 20.5 +/- 0.3 (Vega) at a mid time of ~2.70 hr

after the trigger.

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