Integrated intensity maps of selected transitions toward Sgr B2(N3) (top row), Sgr B2(N4) (middle row), and Sgr B2(N5) (bottom row). For each map, the red cross shows the peak position of the emission and the black cross is the reference position of the hot core derived from Fig. 1. The blue ellipse represents the result of the Gaussian fit to the map while the red ellipse is the deconvolved emission size. The black filled ellipse represents the synthesized beam. The rms and contour levels are indicated in Table 6.