TITLE:   GCN CIRCULAR
NUMBER:  27814
SUBJECT: GRB 200524A: KAIT Optical Observations
DATE:    20/05/25 08:57:28 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, observed the field of GRB 200524A (Fermi-LAT
detection: Dirirsa et al., GCN 27797; Fermi GBM detection: Pookalil
et al., GCN 27809), starting at ~1.08 days after the burst.
We obtained 24x60s images in the clear (roughly R) filter. We detect
the optical afterglow at the location of ZTF20abbiixp/AT2020krl
(Ho et al., GCN 27799) in our co-added image. We estimate the afterglow,
which was also reported by other groups (Kumar et al., GCN 27800;
Rumyantsev et al., GCN 27802; Sanwal et al., GCN 27803; Perley et al.,
GCN 27805; Kumar et al., GCN 27806; de Ugarte Postigo et al., GCN
27807; Blazek et al., GCN 27810; Ogawa et al., GCN 27813), to be
21.2 +/- 0.2 magnitude in clear filter, calibrated to PS1 catalog.