Water masers tracing the disk wind around IRS1b. Left panel: Error bars and numbers give the V_LSR of the 6.7 GHz methanol (black) and 22 GHz water (blue and red for the VLBA and global VLBI) masers plotted versus their position projected along the major axis of the IRS1b’s disk at PA = 107^∘. The numbers are used to identify the water masers belonging to the clusters 1–7 (see Fig. 2). Only the 6.7 GHz masers associated with IRS1b are shown. The magenta parabola gives the quadratic fit to the velocity profile of the 6.7 GHz masers from Moscadelli & Goddi (2014), and the water masers that approximately follow the same velocity profile of the 6.7 GHz masers are encircled in cyan. Right panel: Same as Fig. 2 but showing only the 22 GHz water masers encircled in cyan in the left panel. The colored dots and the dashed line and black-yellow star have the same meaning as in Fig. 1.