Number distribution of SMGs as a function of the radial distance to the center. The points with error bars are the expected numbers of SMGs from the blank field and the bars are the measured numbers in the field. The blue histogram shows the total number of SMGs within each bin. Top: SMG sample divided into bright (S​_850 μm ≥ 5 mJy; green) and faint (S​_850 μm < 5 mJy; red) subsamples. Bottom: SMG sample divided into jet (green) and perpendicular (red) region SMGs (see the schematics in Fig. 7). The corresponding overdensities are displayed as lines in the same colors. The faint SMGs show an excess within the central 2′, while overdensity of bright SMGs peaks at 3′≤r < 4′. Overdensity in jet region shows less dependence on the distance compared to the perpendicular region.