TITLE:   GCN CIRCULAR
NUMBER:  37849
SUBJECT: EP241021a: KAIT optical observations
DATE:    24/10/23 18:16:48 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 EP240930a (Hu et al.,

GCN 37834; Wang et al., GCN 37848) on Oct 22 and again on Oct

23 UT. A set of 70x60s images were obtained in each night in the

clear (roughly R) filters. We detect the optical afterglow

(Fu et al., GCN 37840; Fu et al., GCN 37842; Li et al., GCN 37844;

Ror et al., GCN 37845; Li et al., GCN 37846) in the coadd image and

measure the brightness to be 21.2 +/- 0.2 and 21.7 +/- 0.3 mag at

1.14 and 2.12 days after trigger respectively.