TITLE: GCN CIRCULAR NUMBER: 28737 SUBJECT: GRB 201020A: VIRT optical observations DATE: 20/10/22 02:04:54 GMT FROM: Priyadarshini Gokuldass at U. of the Virgin Islands P. Gokuldass (UVI), R. Strausbaugh (UVI), N. Orange (OrangeWave Innovative Science, LLC), D. Morris (UVI), A. Cucchiara (UVI/College of Marin) report: We observed the field of GRB201020A (Ambrosi et al., GCN 28696) with the 0.5m Virgin Island Robotic Telescope (VIRT) at the University of the Virgin Islands' Etelman Observatory on 10-20-2020 starting at 23:11:52.3 UT (T+17.2 hrs). We performed a series of exposures in R filter with a total exposure of 3140 s. The weather conditions were clear during the hours of observation with an average airmass of 2.1. We find no new source within the enhanced XRT position error circle (Osborne et al., 28698) and report the following 3-sigma upper limit: T_mid ||Exposure ||Filter ||Limit T+18 hrs ||3140s ||R ||>20.6 The limit is estimated from comparison to nearby USNO B1 stars and is not corrected for Galactic extinction. The VIRT is still in the commissioning phase. This work is supported by NASA-MUREP-MIRO grant NNX15AP95A, NSF EiR AST Award 1901296, and NSF HBCU-UP AST Award 1831682. This message can be cited.