TITLE: GCN CIRCULAR NUMBER: 12779 SUBJECT: GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations DATE: 11/12/30 04:32:27 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, M. Nysewander, J. Haislip, K. Ivarsen, M. Maturi, D. Reichart, J. Moore, T. Cromartie, R. Egger, A. Foster, N. Frank, A. Oza, E. Speckhard, A.Trotter, and J. A. Crain report: Skynet continued observing the field of GRB 111228A (Ukwatta et al., GCN 12737) with the PROMPT telescope array at CTIO in Chile and the 16" Dolomites Astronomical Observatory telescope (DAO) in Italy. We detect the afterglow in g', r', i' and B, R, I bands, with a chromatic variation suggested by late time data. A preliminary light curve, calibrated to SDSS catalog sources can be found at the following link: http://skynet.unc.edu/grb/grb111228a.png Further observations are ongoing to attempt to confirm or refute the chromatic variation.