GCN Circular 21012
Subject
Swift Trigger 748858: Zadko observatory - Gingin optical observations
Date
2017-04-19T13:33:13Z (8 years ago)
From
Alain Klotz at IRAP-CNRS-OMP <Alain.Klotz@free.fr>
A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR), D.
Coward (UWA),
M. Boer, (UNS-CNRS-OCA), Gendre B. (UVI - Etelman Obs.),
A. Williams (PO-UWA), R. Martin (PO-UWA)
report:
We imaged the field of the trigger 748858 detected by SWIFT
with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.
The observations started 4.25h after the GRB trigger.
The elevation of the field increased from
18 degrees above horizon and weather conditions
were good.
We co-added a two series of exposures:
t0+4.25h to t0+4.40h : Rlim = 20.1
t0+4.65h to t0+5.22h : Rlim = 20.3
No source exhibit a variation flux compatible with
a GRB afterglow. All sources detected by Zadko are
presents in the DR9 SDSS-III image.
Magnitudes were estimated with the nearby NOMAD1 stars
and are not corrected for galactic dust extinction.