GCN Circular 1480
E. Rykoff, D. Smith on behalf of the ROTSE Collaboration, report: "ROTSE-IIIa responded automatically to GRB020813 (HETE trigger 2262) and started imaging at 13 August 2002 02:48:48.50 UT, 4.48 minutes after the start of the burst, and 15 seconds after receipt of GRB coordinates from the GCN. This response was during early twilight at Los Alamos National Laboratory, and our first several images were saturated by bright sky. Our first usable exposure, 60 seconds in duration beginning at 03:02:36.28, shows no optical transient to an unfiltered limiting magnitude ~ 16.0 under adverse conditions. Our typical limit is several magnitudes deeper. This limit is around 0.5 magnitude brighter than the extrapolation of the decay of the OT as reported by Li, et. al. (GCN circular 1473)." This message may be cited.