X-ray surface brightness profiles across the wake of several cluster merger models. The extraction region of the profiles is shown in the previous images as the dashed orange line. Distance is measured in arc sec along the extraction path, model B_1 is the corresponding B model of ZYL15 and is used here as a reference model. The width of the hatched region represents the uncertainties of the Chandra observation, as shown by the blue error bars in Fig. 8 of ZYL15 (courtesy of C. Zhang).