GCN Circular 29861
Subject
GRB 210420B: KAIT Optical Observations
Event
Date
2021-04-21T14:39:40Z (5 years ago)
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 the Swift GRB 210420B (Moss et al.,
GCN 29844) starting at ~0.61 days after the Swift trigger (Lien et al.
GCN 29854). A total of 30x60s images were obtained in the clear (roughly R)
filters. We detect the optical afterglow (Lipunov et al., GCN 29845;
Oksanen,
GCN 29846; Hu et al., GCN 29847; Sun et al., GCN 29848; Leonini et al.,
GCN 29851; de Ugarte Postigo et al., GCN 29852; Watson et al., GCN 29858)
in the coadd image with a mag of 19.9 +/- 0.2, calibrated to the
Pan-STARRS1 catalog.