Astrometry for the four point sources detected (solid points) by both NACO (black and green) and IRDIS (red) and the expected values for background objects (open points). Data points are color coded by date, not by instrument. These point sources are highlighted with the green squares in Fig. 4. The numbers of the candidate companions listed in the title of each panel column are the same as shown in Fig. 4. All four point sources are shown to not be co-moving with RX J1615.