TITLE: GCN CIRCULAR NUMBER: 8400 SUBJECT: GRB 081024: Early Super-LOTIS Observations DATE: 08/10/24 08:10:37 GMT FROM: Grant Williams at Steward Observatory G. G. Williams (MMTO) and P. A. Milne (Steward Observatory), on behalf of the Super-LOTIS Collaboration, report: The robotic 0.6-m Super-LOTIS telescope began observing the error box of GRB 081024 (Swift Trigger 332516, Stratta et al. GCN 8398) at 05:53:49.9 UT, 41.9 seconds after the trigger. Our initial observations include 5 x 10s exposures, 5 x 20s exposures, and 30 x 60s exposures, all in the R-band. We do not detect any variable sources or afterglow candidates within the XRT error box in our earliest exposure to the following 3-sigma limiting magnitude determined from the nearby USNO-B1.0 star 1513-0063175 with R2=14.24: t_start (UT) exp t (s) t_start-t_0 (s) Limit ------------------------------------------------------------ 05:53:49.9 10 41.9 R > 17.6 The value quoted above is not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=1.64 mag in the direction of the burst (Schlegel et al. 1998). Additional observations and analysis are ongoing.