The SMA 1.3 mm continuum map of S255IR, S255N, and S255S. contour levels start at 5σ in steps of 5σ in S255IR (1σ = 1.7 mJy/beam) and S255N (1σ = 1.6 mJy/beam) image and 3σ in S255S (1σ = 0.9 mJy/beam) image. The dotted contours are the negative features due to the missing flux. The synthesis beam is shown at the bottom left of each figure. In the S255IR panel, the asterisk marks the position of NIRS 3 and the right one marks NIRS 1 (Tamura et al. 1991). The inset is a zoom in the continuum image of the inner region of S255IR-SMA1 and the contour levels start at 5σ in steps of 10σ. The triangles are the water masers (Goddi et al. 2007) and the two open diamond mark the positions of two 6.7 GHz methanol masers detected by Xu et al. (2009). In S255N panel, the crosses mark the position of the Class I 44 GHz (7₀ − 6₁) A⁺ methanol masers detected by Kurtz et al. (2004) and the triangle is the water maser (Cyganowski et al. 2007). The (0, 0) point in each panel from left to right is RA 06^h12^m54.019^s Dec 17°59′23.10′′ (J2000.0), RA 06^h12^m53.669^s Dec  + 18°00′26.90′′ (J2000.0) and RA 06^h12^m56.58^s Dec  + 17°58′32.80′′ (J2000.0), respectively.