GCN 43083: EP251212a: KAIT optical upper limit

WeiKang Zheng (UCB), Xuhui Han (NAOC), Pinpin Zhang (NAOC) and

Alexei V. Filippenko (UCB) 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 EP251212a (Yang et al.,

GCN 43076; Salunke et al., GCN 43082) starting at 11:09, Dec 12 UT,

about 4.95 hours after the burst. A set of 38x60s clear (roughly R)

filter images were obtained. In our coadd image, we did not detect

any new source within the EP-FXT error circle (Yang et al., GCN

43081) down to a limiting mag of 21.2 mag (Vega) at a mid-time of

5.57 hours after the burst. Our result is consistent with the upper

limit reported from COLIBRÍ observations (Ducoin et al., GCN 43077).