TITLE: GCN CIRCULAR NUMBER: 19287 SUBJECT: GRB 160410A: TAROT La Silla observatory early optical observations DATE: 16/04/11 13:13:27 GMT FROM: Alain Klotz at IRAP-CNRS-OMP Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP), Boer, M., Laugier, R. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.) report: We imaged the field of GRB 160410A detected by SWIFT (trigger 682269) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 28s after the GRB trigger (16.8s after the notice). Due to a technical problem only the first exposure of 60s was taken. The image is trailed (see the description in Klotz et al., 2006, A&A 451, L39). We detect the UVOT optical transcient discovered by Gibson et al. (GCNC 19271). At the beginning of the trail (t0+28s) the magnitude is R=18.4 (+/-0.3) and decays to R=18.7 (limiting magnitude) at t0+46s. Then the OT became too faint to be detected between t0+46 and t0+88s (Rlim=18.7). Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.