GCN Circular 37286
Subject
GRB 240824B: KAIT optical upper limit
Date
2024-08-25T21:22:49Z (4 months ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
legacy email
WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on
behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at
Lick Observatory, responded to GRB 240824B (Fermi GBM team, GCN
37260; Nakajima et al., GCN 37261; DeLaunay et al., GCN 37267;
Sharma et al., GCN 37284) starting at 06:53 UT, Aug. 25, ~17.70
hours after the burst. A total of 180 x 60s images were obtained
in the clear (roughly R) filters. We did not detect any new optical
counterpart candidate within the Swift/XRT X-ray afterglow
(Source 1) error circle reported by Kennea et al. (GCN 37270) in
our coadd image, which we estimate the limiting magnitude to be
~21.0 mag at a mid time of 20.70 hours after the burst, consistent
with the upper limit report from Malesani et al. (GCN 37281).