GCN Circular 34001
Subject
GRB 230618A: KAIT Optical Observations
Date
2023-06-18T09:20:07Z (a year ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
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 230618A detected by Swift
(Page et al., GCN 33989) starting at 04:31:35 UT, about 0.69 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 marginally detected the optical afterglow
reported by Strausbaugh et al. (GCN 33992) in our coadd image
in clear band, which we measured its brightness of 20.8 +/- 0.3 mag
at a mid time of ~0.79 hours after the burst, calibrated to the
Pan-STARRS1 catalog.