[vsnet-grb-info 27737] GRB 210419C: KAIT Optical Upper Limit
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Apr 21 00:18:19 JST 2021
TITLE: GCN CIRCULAR
NUMBER: 29840
SUBJECT: GRB 210419C: KAIT Optical Upper Limit
DATE: 21/04/20 15:17:16 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 Swift GRB 210419C (Moss et al.,
GCN 29834) starting at 6.87 hours after the burst. A total of
30x60s images were obtained in the clear (roughly R) filters.
We do not detect any new source within the enhanced XRT error circle
(Beardmore et al., GCN 29839) in the co-add images, down to a limiting
magnitude of ~21.5 mag calibrated to the PS1 catalog.
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