TITLE: GCN CIRCULAR NUMBER: 14116 SUBJECT: Skynet/PROMPT observations of GRB121229a DATE: 12/12/29 06:28:57 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, N. Frank, D. Reichart, J. Haislip, K. Ivarsen, 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 began observing the field of GRB121229a beginning ~2 minutes after the burst using three of the PROMPT telescopes located at CTIO in Chile in B,R, and I. No optical afterglow is detected in the early observations. Calibrating to several nearby USNO B1.0 stars, and co-adding the early observations, the following 3-sigma limiting magnitudes are obtained, at a mean observing time of ~30 minutes post burst: Filt Time 3-Sig Limit B 29.7m >20.6 R 29.7m >20.7 I 33.1m >20.5 Further observations are ongoing.