Model light curves for the afterglow of GRB 151027B at X-rays (red), optical (green, extinction-corrected), and radio (blue; open and filled symbols are 5.5 and 9 GHz, respectively; circles = detection, triangles = upper limits) for the lowest-E_kin parameter set. Data are drawn with error bars, which are mostly smaller than the symbol size. The vertical line denotes the break time of 22.5 ks (see Sect. 3.2). Radio data have not been used in deriving the model, so the blue curve is actually a “predicted” light curve.