TITLE: GCN CIRCULAR NUMBER: 26142 SUBJECT: GRB 191101A: VIRT Optical Upper Limits DATE: 19/11/02 01:51:43 GMT FROM: Priyadarshini Gokuldass at U. of the Virgin Islands P. Gokuldass (UVI), D. Morris (UVI), N. Orange (OrangeWave Innovative Science, LLC), A. Cucchiara (College of Marin), R. Strausbaugh (UVI) report: We observed the field of GRB 191101A (A.P. Beardmore et al., GCN 26140; P.A. Evans et al., GCN 26137, D'Ai et al., GCN 26135) with the 0.5m Virgin Island Robotic Telescope (VIRT) on 11-01-2019 starting at 23:03:18 UT (T+115m). We report on an initial series of exposures in Clear filter totaling 110s with an observation midpoint of T+117m. The weather conditions were very good during the hours of observation and the zenith angle at the start of the observation was 63 degrees. We observed the Swift XRT position with a 20'x20' field of view. We find no new source at the Swift-XRT position and report a 3-sigma upper limit of approximately V=17.0. 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. Observations and analysis are ongoing. This message can be cited.