BeSSeL VLBA 2011 and global VLBI 2023 observations of the water masers toward VLA 3. (Left panel) Absolute positions (relative to the epoch June 6, 2023) are reported with colored dots and squares for the water masers from the BeSSeL VLBA and global VLBI observations, respectively. Colors denote the maser V_LSR, and masers from the same VLBI observation have symbol area proportional to the logarithm of their intensity. Colored arrows represent the absolute proper motions of the water masers measured through the six VLBA epochs, with the velocity scale shown in the bottom right of the panel. Only the proper motions with directions accurate within 45° are plotted. Black contours represent the 13 GHz JVLA A-configuration continuum observed within the POETS survey. Plotted contours are 10% to 90% (in steps of 10%) of the map peak equal to 0.9 mJy beam⁻¹. (Right panel) Zoom on the cluster of water masers located at the peak of the VLA 3B radio continuum emission. The dashed line draws the major axis of the spatial distribution of the BeSSeL VLBA 2011 water masers.