GRB 210731A: KAIT Optical Detection
Abstract
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to the Swift GRB 210731A (Troja et al., GCN 30568) starting at ~9.04 hours after the Swift trigger. A total of 30x60s images were obtained in the clear (roughly R) filter. The optical afterglow (de Wet et al., GCN 30571; Kuin et al., GCN 30572; Guelbenzu et al., GCN 30574; Lipunov et al., GCN 30578;) was clearly detected in each single image. We measured its brightness of 18.6 +/- 0.1 mag at 9.26 hours after burst, calibrated to the Pan-STARRS1 catalog.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2021
- Bibcode:
- 2021GCN.30582....1Z