TITLE:   GCN CIRCULAR
NUMBER:  36939
SUBJECT: GRB 240727A: KAIT Optical Afterglow Candidate
DATE:    24/07/27 04:49:46 GMT
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 Swift GRB 240727A (Parsotan et al.,

GCN 36938) starting on July 27, 04:22:16 UT. We detected an uncataloged

optical afterglow candidate not shown in DSS archive at position

of (error ~0.5"):


RA:  15:45:44.98  (J2000)

Dec: +08:37:13.15 (J2000)


This position is about 1.1 arcsec to the Swift/XRT localization

(Parsotan et al., GCN 36938). We measure the target is ~19.0 in our

clear band image at ~34 minutes after burst. We can not estimate the

variability at this time, further observations are encouraged.