GCN Circular 37127
Subject
GRB 240809A: KAIT optical observations
Date
2024-08-10T06:19:23Z (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 240809A detected by Swift
(Evans et al., GCN 37110) starting about 0.86 days after the bust.
Observations were performed in the clear (roughly R) filter, and
the exposure time was 60s per image. A total of 30 images were
obtained. We detected the optical afterglow (Evans et al.,
GCN 37110; Dubay et al., GCN 37114; Jiang et al., GCN 37116;
Gottumukkala et al., GCN 37122; Mohan et al., GCN 37125) in our
coadd image in clear band. We measured its brightness of 21.0 +/-
0.2 mag at a mid time of ~0.86 days after the burst, calibrated to
the Pan-STARRS1 catalog.