TITLE: GCN CIRCULAR NUMBER: 13764 SUBJECT: Skynet/PROMPT observations of GRB120913B DATE: 12/09/14 00:33:59 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, K. Ivarsen, J. Haislip, D. Reichart, J. Moore, H. T. Cromartie, R. Egger, A. Foster, N. Frank, M. Nysewander, A. Oza, E. Speckhard, A.Trotter, and J. A. Crain report: Skynet observed the field of GRB120913B (GCN 13763, Swift trigger #533613) with four of the PROMPT telescopes located at CTIO in Chile in BVRI beginning ~58 seconds after the burst. We detect a fading source at RA 14:14:38.46 DEC -14:30:57.2, within the BAT error circle. The object peaked at a magnitude of ~15.9 in R (calibrated to nearby SDSS catalog stars) at ~4.2 minutes after the burst before beginning to fade. Further observations are ongoing.