TITLE: GCN CIRCULAR NUMBER: 6995 SUBJECT: GRB 071025: Early Super-LOTIS Observations DATE: 07/10/25 09:54:28 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 071025 (Swift Trigger 295301, Pagani et al. GCN 6986) at 04:10:29.3 UT, 95 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 detect the afterglow reported by Rykoff et al. (GCN 6987, confirmed by Covino et al. GCN 6988) in the sum of our first ten 60s exposures centered on 04:19:39 UT. We do not detect the afterglow in our single 10s or 20s exposures. Using USNO-B1.0 stars we estimate the following R-band magnitude and upper limits for the OT: t_start (UT) t_mid (UT) exp t (s) t_start-t_0 (s) R Mag ----------------------------------------------------------------------------------------------------- 04:10:29.3 04:10:34.3 10 95.3 R > 17.3 04:13:42.1 04:13:52.1 20 288.1 R > 17.8 04:14:08.8 04:19:39.0 600 314.8 R = 17.97 +/- 0.17 Our upper limit of R > 17.8 was measured near the time of the unfiltered m=17.3 peak reported by Rykoff et al. (GCN 6992). Additional observations and analysis are ongoing.