TITLE: GCN CIRCULAR NUMBER: 11215 SUBJECT: GRB 100905A: Faulkes Telescope North observations DATE: 10/09/05 15:57:12 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), I. A. Steele, C. G. Mundell (LJMU), A. Gomboc (U. Ljubljana) report on behalf of a large collaboration: The Faulkes Telescope North automatically began observing Swift GRB 100905A (Marshall et al. GCN Circ. 11214) on September 05, 15:10:32 UT, 138 s from the GRB trigger time. Within the XRT error circle we do not find any source down to the following limiting magnitudes: Mid Time from Exposure Filter Lim. Mag. GRB (s) (s) ------------------------------------------------------- 179 3x10 R > 19.8 604 120 R > 20.0 839 100 i' > 19.0 ------------------------------------------------------- Magnitudes are calibrated against nearby USNOB-1 stars R2 and I values. Observations stopped soon due to twilight.