TITLE: GCN CIRCULAR NUMBER: 10982 SUBJECT: GRB100725A Faulkes Telescope South observations DATE: 10/07/25 10:01:24 GMT FROM: David Bersier at Liverpool John Moores U D. Bersier, C. Guidorzi, Z. Cano, S. Kobayashi report on behalf of a larger collaboration: We observed the location of GRB100725A (GCN 10979) with the Faulkes Telescope South, starting at the beginning of the night (1.7 hour after trigger). In a 5 minutes R-band exposure, we do not detect any source not present on the DSS inside the enhanced XRT error circle (GCN 10980). Any source at m=20.0 would have been clearly detected. The same holds for a 6x5minutes exposure at a magnitude m=21.3.