Constraints on the kSZ and the tSZ amplitudes toward the regions associated with the four subclusters (from A to D). The black data points provide the average brightness measured by NIKA in the 22 arcsec radius regions with center coordinates given in Table 2 and shown in Fig. 1. The shaded areas give the 68% confidence level constraints on the kSZ (red), the tSZ (blue) and the sum of the two (gray). Possible point source residuals were masked when computing the average surface brightness.