TITLE:   GCN CIRCULAR
NUMBER:  18999
SUBJECT: GRB 160203A: Zadko observatory - Gingin optical detection
DATE:    16/02/07 18:07:18 GMT
FROM:    Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@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 analysed the field of GRB 160203A detected by SWIFT
(trigger 672525) with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.

The observations started 10.9h after the GRB trigger.
The elevation of the field increased from
23 degrees above horizon and weather conditions
were very good.

The first fast analysis (Boer et al. GCNC 18985)
can be now completed by late images. The stack
of images shows the afterglow. Measurements:

t1(s) t2(s)  Rmag   d_Rmag
44824 48920 22.30   0.50

Magnitudes are not corrected for galactic dust extinction.