TITLE: GCN CIRCULAR NUMBER: 7393 SUBJECT: GRB 080310: RRM optical photometry with the VLT DATE: 08/03/10 11:28:50 GMT FROM: Stefano Covino at Brera Astronomical Observatory S. Covino, G. Tagliaferri, D. Fugazza, G. Chincarini, on behalf of the MISTICI collaboration report: We observed the field of GRB 080310 (GCN 7382, Cummings et al.) with the VLT equipped with FORS2 with the Rapid Response Mode starting from 2008-03-20 at 08:42:59 UT (about 5 minutes from the burst) for almost one hour of continuous observations. The optical afterglow (GCN 7381, Chornock et al.) is well detected and it was brighter than R~17 (compared to USNO stars) already in the first frame. A complete analysis is in progress. [GCN OPS NOTE(10mar08): Per author's request, the "VBLT" in the Subject-line was changed to "VLT".]