TITLE: GCN CIRCULAR NUMBER: 11305 SUBJECT: GRB 100925A / MAXI J1659-152: SARA-S Observations DATE: 10/09/26 04:03:03 GMT FROM: Adria C. Updike at Clemson U Adria C. Updike and Dieter H. Hartmann (Clemson University) report: We observed the field of GRB 100925A / MAXI J1659-152 (Mangano et al., GCN 11296) using the SARA-South 0.6m telescope located at CTIO beginning 15 hours after the trigger and continuing for 3 hours in the BVRI Bessel filters under good conditions. We clearly detect the source (Marshall, GCN 11298) in each image. Filter Exp Time Magnitude --------------------------------- B 120s 16.8 +/- 0.1 V 120s 16.3 +/- 0.1 R 120s 16.3 +/- 0.1 I 120s 16.1 +/- 0.1 Magnitudes are given relative to field stars in the USNO B1.0 and NOMAD catalogs. This message may be cited.