TITLE:   GCN CIRCULAR
NUMBER:  42427
SUBJECT: GRB 251022A: KAIT optical observations
DATE:    25/10/24 18:47:18 GMT
FROM:    Weikang Zheng at UC Berkeley <weikang@berkeley.edu>

WeiKang Zheng (UCB) 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 GRB 251022A (Fermi GBM

Team, GCN 42380; Di Lalla et al., GCN 42384; DeLaunay et al.,

GCN 42409; Mukherjee et al., GCN 42410) starting at ~0.46d and

again at ~1.39d after the burst. A set of clear (roughly R)

filter images were obtained. We detected the optical afterglow

(O’Neill et al. GCN 42386; Becerra et al. GCN 42394; Lipunov

et al. GCN 42395; Mandarakas et al. GCN 42397; Mohan et al. GCN

42413; Méndez et al., GCN 42423) in our coadd images. We estimate

the afterglow to be 19.2 +/- 0.2 and 21.6 +/- 0.3 mag (Vega) at a

mid time of ~0.47d and ~1.40d respectively.