[vsnet-grb-info 13131] GRB 130427A: Zadko observatory - Gingin optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sun Apr 28 02:44:56 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 14468
SUBJECT: GRB 130427A: Zadko observatory - Gingin optical observations
DATE: 13/04/27 17:43:48 GMT
FROM: Alain Klotz at IRAP-CNRS-OMP <Alain.Klotz at free.fr>
B. Gendre, A. Klotz (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR),
D. Coward (UWA), M. Boer, K. Siellez, H. Dereli ,
O. Bardho (UNS-CNRS-ARTEMIS-OCA), A. Williams (PO-UWA),
R. Martin (PO-UWA) report:
We imaged the field of GRB 130427A detected by SWIFT
(trigger 554620) with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.
The observations started 3.44h after the GRB trigger
(the event occured during the local afternoon).
The elevation of the field increased from
23 degrees above horizon and weather conditions
were good.
We detect the optical couterpart discovered by
Elenin et al. (GCNC 14450). The unfiltered images
are analyzed regarding the R magnitude of star
catalogues. The preliminary light curve is:
Tstart Tstop Rmag 1sig
(mins) (mins)
207 219 15.50 0.1
220 232 15.54 0.1
238 250 15.37 0.1
252 264 15.56 0.1
265 277 15.51 0.1
304 319 15.58 0.1
447 450 16.27 0.2
Magnitudes are not corrected for galactic dust extinction.
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