TITLE: GCN CIRCULAR NUMBER: 9531 SUBJECT: GRB090618 - Continued optical monitoring and light curve break DATE: 09/06/19 08:56:19 GMT FROM: Zach Cano at ARI/John Moores Liverpool Z. Cano (Liverpool JMU), C. Guidorzi (U. Ferrara), D. Bersier, A. Melandri, I.A. Steele, R.J. Smith, C. Mundell (Liverpool JMU) report, on behalf of a large collaboration: Following our report of observations (GCN 9520) we continued monitoring the field of GRB090618 (Swift trigger 355083) on the Liverpool Telescope (La Palma) from 13.6 hours to 17.9 hours post burst in R and i bands. Below is a summary of a few R-band images: t_exp t-T0 R-mag 300s 13.6 hours 18.9 ± 0.1 300s 15.6 hours 19.1 ± 0.1 300s 17.9 hours 19.3 ± 0.1 The calibration is still preliminary and determined against stars in the USNO catalog. We note a break in the R-band light curve, and find a decay index of alpha~1.4 by 17.9 hours post burst, as compared to alpha~0.7 previously reported (GCNs 9517, 9520).