TITLE: GCN CIRCULAR NUMBER: 15050 SUBJECT: GRB 130727A: Faulkes Telescope South optical afterglow DATE: 13/07/27 19:44:30 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), F. Virgili (LJMU) on behalf of a large collaboration report: The 2-m Faulkes Telescope South automatically began observing GRB 130727A (Stroh et al. GCN Circ. 15046) on July 27 2013 at 17:01:22 UT (~16 min after the burst trigger). Within the XRT error circle (Perri et al. GCN Circ. 15048) we find a fading uncatalogued object at coordinates RA(2000.0)= 22:03:11.66 Dec(2000.0)= -65:32:18.7 (error 0.5") with the following magnitudes Mid time from Total Exp Filter Magnitude trigger (min) (s) -------------------------------------------------------------- 16.0 10 R 19.3 +- 0.3 47.1 180 R 20.1 +- 0.1 -------------------------------------------------------------- Magnitudes are calibrated against nearby USNO-B1 stars.