[vsnet-grb-info 18199] GRB 160703A: Zadko observatory - Gingin optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19647
SUBJECT: GRB 160703A: Zadko observatory - Gingin optical observations
DATE:    16/07/03 19:25:36 GMT
FROM:    Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz at free.fr>

Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Laugier, R. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.),
Coward, D. McPherson, D. Williams A., Martin R.,
Moore J., Dodson R. (UWA) report:

We imaged the field of GRB 160703A detected by SWIFT
(trigger 702699) with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.

The observations started 5.5h after the GRB trigger.
The elevation of the field decreased from only
20 degrees above horizon and weather conditions
were good.

We co-added a series of exposures.
No credible source was found in the BAT error box:
t0+5.5h to t0+5.6h : Rlim = 19.4

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.