TITLE: GCN CIRCULAR NUMBER: 22534 SUBJECT: GRB 180325A: prompt LT observations DATE: 18/03/25 03:05:01 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell (U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU) on behalf of a large collaboration report: The 2-m Liverpool Telescope automatically began observing Swift GRB 180325A (Troja et al. GCN 22532) on March 25, 01:55:25 UT (143 seconds since the GRB trigger time) with the RINGO3 polarimeter and the IO:O camera in the SDSS-R filter. We clearly detect the optical afterglow (Troja et al.) with the following magnitude: Mid Time from GRB  Exposure       Filter       Magnitude (AB) (min)              (s) ------------------------------------------------------------- 35.1               6x10           SDSS-R       19.02 +- 0.05 ------------------------------------------------------------- as calibrated against nearby SDSS objects.