TITLE: GCN CIRCULAR NUMBER: 16920 SUBJECT: GRB 141017A: Zadko observatory - Gingin optical observations DATE: 14/10/17 20:32:44 GMT FROM: Alain Klotz at IRAP-CNRS-OMP A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR), D. Coward (UWA), M. Boer, B. Gendre, K. Siellez, H. Dereli, O. Bardho (UNS-CNRS-OCA), A. Williams (PO-UWA), R. Martin (PO-UWA) report: We imaged the field of GRB 141017A detected by SWIFT (trigger 615672) with the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia. The observations started 42 min after the GRB trigger. The elevation of the field increased from 58 degrees above horizon and weather conditions were excellent. We examined a series of exposures obtained between 42 min and 110 min. In the error box given by SWIFT XRT (Marshall et al. GCNC 16919) we detect a source of magnitude R=22.4 (+/-0.4) which does not seem to be variable. Its position is 06:14:31.2 -58:34:56 J2000.0. We do not believe that it is the afterglow of GRB 141017A. We conclude the afterglow of GRB 141017A is fainter than R=22.4 42 minutes after the trigger. Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.