GCN Circular 37304
Subject
GRB 240825A: KAIT optical observations
Event
Date
2024-08-26T17:49:29Z (a year 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 240825A (Gupta et al., GCN 37274;
Fermi GBM team, GCN 37273) starting at 05:36 UT, Aug. 26th, about
13.73 hours after the bust. Observations were performed in the clear
(roughly R) filter, and the exposure time was 60s per image, with a
total of 31 images were obtained. We clearly detected the optical
afterglow (Gupta et al., GCN 37274; Jiang et al., GCN 37275; Dutton
et al., GCN 37276; Odeh et al., GCN 37277, Zhang et al., GCN 37278;
Li et al., GCN 37280, Izzo et al., GCN 37287; Lipunov et al., GCN
37289; Leonini et al., GCN 37291; Wu et al., GCN 37292; Martin-Carrillo
et al., GCN 37293; Brivio et al., GCN 37295; Kuin et al., GCN 37296;
Odeh et al., GCN 37299; Le Floc’h et al., GCN 37300; Guiffreda et al.,
GCN 37303) in our coadd image, which we measured its brightness of
20.8 +/- 0.2 mag at a mid time of ~14.04 hours after the burst,
calibrated to the Pan-STARRS1 catalog.