TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3947 SUBJECT: GRB 050908: Prompt PROMPT Observations DATE: 05/09/08 08:35:27 GMT FROM: Daniel E. Reichart at U.North Carolina J. Kirschbrown, C. MacLeod, D. Reichart, M. Nysewander, A. Crain, A. Foster, A. LaCluyze report on behalf of the UNC team of the FUN GRB Collaboration. Under the control of Skynet, PROMPT automatically observed the localization of GRB 050908 (Goad et al., GCN 3942) beginning 50 sec after the burst in repeating blocks of BVRcIc (two filters simultaneously). We detect the afterglow (Torii, GCN 3943) and measure its brightness to be Rc ~ 19 mag at 20 min after the burst. PROMPT is still being built and commissioned.