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).
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