FUV and Hα images of the field including J1741 and its BSN. Source 1 is the pulsar counterpart, Source 2 is the bright UV point source, used for astrometry. The arrows show the direction of the pulsar’s proper motion. Top left: F125LP image of the whole ACS/SBC FoV. The white contour shows the outer boundary of the Hα BSN from the SOAR image. Top right: SOAR/SAM Hα image of the BSN. The red cross shows the pulsar position. Bottom left: Same field as shown in the top left panel. Six areas within the white, yellow, and green contours were used for the flux measurements from the specific regions of the BSN (see Table 2); the background for this measurement was extracted from the areas within the corresponding cyan contours. Bottom right: F140LP image.