GCN Circular 29576
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 210226A (Beardmore et al., GCN 29568) starting at 04:56:15 UT, 738s after the burst. Observations were performed with an automatic sequence in the clear (roughly R), V, and I filters, and the exposure time was 20s per image. We do not detect any optical afterglow candidate within the enhanced XRT position error circle (Goad et al., GCN 29571), neither in single image, nor in the co-add images. The typical limiting magnitude of our single clear image is about 19.0 mag calibrated to the USNOB1.0 catalog. Our result is consistent with the optical upper limit reported by other groups (Jelinek et al., GCN 29570; Romanov, GCN 29572; Lipunov et al., GCN 29574).