TITLE:   GCN CIRCULAR
NUMBER:  42571
SUBJECT: GRB 251103A: KAIT optical observations
DATE:    25/11/04 08:07:10 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 GRB 251103A (Hu et al.,

GCN 42534; Fermi GBM Team, GCN 42536; Wang et al., GCN 42552;

Sonawane et al., GCN 42553; DeLaunay et al., GCN 42568) starting

at 11:54 UT, 7.13 hours after the burst. A set of clear (roughly R)

filter images were obtained. We clearly detected the afterglow

(Schneider et al., GCN 42535; Turpin et al., GCN 42538; Gritsevich

et al., GCN 42539; Izzo et al., GCN 42540; O'Neill et al., GCN 42543;

Ghosh et al., GCN 42545; Schneider et al., GCN 42549; Breeveld et al.,

GCN 42554; Hellot et al., GCN 42559; Mo et al., GCN 42562) in our

coadd image.  We measure its brightness to be 19.4 +/- 0.2 mag (Vega)

at mid time of 7.72 hours after the burst.