TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1514 SUBJECT: GRB020813: VRI Decay Slopes DATE: 02/08/21 03:19:31 GMT FROM: Derek Fox at CIT Mike Gladders (Carnegie Observatories) and Pat Hall (Princeton/Catolica) report: "The photometric data reported previously by us yield the following decay slopes for the OT of GRB020813. The decay slopes in various filters implied by the data from August 13UT are: I: -0.677+-0.016 (all data August 13UT) I: -0.76+-0.03 (only UT>6.5, to match R&V time range) R: -0.82+-0.06 V: -0.75+-0.05 "These data are consistent with the same power law decay in all three filters in the time interval 6.5