GRB 180510B: TAROT La Silla observatory optical observations

We imaged the field of GRB 180510B detected by SWIFT (trigger 831816)with the TAROT robotic telescope (D=25cm) located at the EuropeanSouthern Observatory, La Silla observatory, Chile. The observationsstarted 2.88h after the GRB trigger just after the dusk. The elevationof the field decreased from 38 degrees above horizon weather conditionswere good. We co-added a series of exposures but we we cannot detectthe OT reported by Tohuvavohu et al. (GCNC 22696) Preliminary analysisgives: start end rlim(AB) (hour) (hour) 2.88 3.62 19.0 Magnitudes were estimated with the nearby NOMAD1 stars and are notcorrected for galactic dust extinction.