[vsnet-grb-info 27430] GRB 210217A: KAIT Optical Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29533
SUBJECT: GRB 210217A: KAIT Optical Observations
DATE:    21/02/18 17:57:39 GMT
FROM:    Weikang Zheng at UC Berkeley  <weikang at 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 the Swift GRB 210217A (Simpson et al.,

GCN 29521) starting at ~4.27 hours after the Swift trigger.

A total of 30x60s images were obtained in the clear (roughly R) filters.

We marginally detect the optical afterglow (Simpson et al., GCN 29521;

Zhu et al., GCN 29523) in the coadd image with a mag of 20.8 +/- 0.3,

calibrated to the Pan-STARRS1 catalog.