TITLE: GCN CIRCULAR NUMBER: 9924 SUBJECT: GRB 090807: Skynet/DSO Observations DATE: 09/09/18 06:01:13 GMT FROM: Josh Haislip at U.North Carolina J. Haislip, D. Reichart, A. Smith, D. Caton, L. Hawkins, K. Ivarsen, M. Schubel, A. LaCluyze, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, A. Trotter, J. A. Crain, and M. Nysewander report: Skynet observed the Swift/BAT localization of GRB 090807 (Cannizzo et al., GCN 9746) with the 14" Dark Sky Observatory telescope in North Carolina beginning 10.4 hours after the trigger in I. We do not detect the afterglow (Cannizzo et al., GCN 9746). Stacking only images that increase the limiting magnitude yields: mean 1-sig. 1-sig. time 3-sig. sys. stat. since lim. cal. cal. cal. trig. tel. exp. fil. mag. stars unc. unc. (h) (# x s) (mag) (mag) 10.7 DSO-14 10 x 160 I 18.9 807 USNO B1 0.489 0.000