TITLE:   GCN CIRCULAR
NUMBER:  37094
SUBJECT: EP240802a/GRB240802A: KAIT optical upper limit
DATE:    24/08/07 19:47:10 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, responded to the fast X-ray transient EP240802a

from the Einstein Probe (Wang et al. GCNC 37019) starting at 04:17

UT, Aug 3rd, ~0.74 days after the trigger. EP240802a was also found

to be coincidence with GRB 240802A (Waratkar et al., GCN 37018;

Aryan et al., GCN 37021; Kozyrev et al., GCN 37078). We obtained a

set of clear (roughly R) filter images, we do not detect any new

optical counterpart in the FXT errorbox (Wang et al. GCNC 37019),

neither in single image, nor in the co-add images. We measure the

limiting mag to be ~21.0 in 28x60s co-add image at a mid time of

~0.80 days after the trigger. Our result is consistent with the

upper limit reported from Aryan et al. (GCN 37021), Quadri et al.

(GCN 37023) and Leonini et al. (GCN 37029).