GCN Circular 37127

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
Not found
 
 
) 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
Not found
 
 
; Dubay et al., GCN 37114
Not found
 
 
; Jiang et al., GCN 37116
Not found
 
 
;

Gottumukkala et al., GCN 37122
Not found
 
 
; Mohan et al., GCN 37125
Not found
 
 
) 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.