Peak velocity (a) and line-width map (b) of Sgr B2 (N1) created using the 108.44 GHz (E_u = 88 K) transition of C₂H₅OH (black region in c) and the 95.91 GHz (E_u = 21 K) transition of CH₃OH (maroon region in c). The map in panel (c) shows at which positions in (a) and (b) either C₂H₅OH (black) or CH₃OH (maroon) was used. The transition from ethanol to methanol happens when the fitted peak intensity of the ethanol line is less than 5σ, where σ is the median rms noise level listed in Table 2 in Belloche et al. (2019). At positions where neither C₂H₅OH nor CH₃OH are detected above this threshold (yellow region) the peak velocity and line width were fixed to values of 64 km s⁻¹ and 4 km s⁻¹, respectively, to produce the LVINE maps shown in Fig. 4 and were blanked in a) and b).