GCN Circular 26561
Subject
GRB 191221B: Zadko observatory - Gingin optical observations
Date
2019-12-22T19:43:01Z (4 years ago)
From
Bruce Gendre at UVI <bruce.gendre@gmail.com>
B. Gendre (OzGrav-UWA), H. Crisp (OzGrav-UWA), J. Moore (OzGrav-UWA),
D. Coward (OzGrav-UWA), A. Klotz (IRAP-CNRS-OMP), P. Thierry (Aragne
Observatory), A. Burrell (OzGrav-UWA), J. Zadko (Claire Energy),
M. Boer, (UNS-CNRS-OCA)
report:
We imaged the field of GRB 191221B detected by Swift (trigger 945521,
Laha et al. GCN 26534) with the Zadko robotic telescope (D=100cm)
located at the Zadko observatory - Gingin, Australia.
The observations started 19 hours after the GRB trigger. The elevation
of the field was at 32 degrees above horizon and weather conditions
were good. We performed 6 long exposures of 180s in Clear filter.
We detected the candidate couterpart mentioned by Lipunov et al. (GCNC
26537) in each of the images.
OT was R~17.6+/-0.2 at that time. Further analysis and observations are
ongoing.
Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.
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