Residual map in field A after NEBULISIER background filtering. Left panel: residual [S II] λ 6731 profiles extracted for each labeled target in field A with a 1″ aperture. The gray line marks the average radial velocity of the ISM in the field. Middle panel: residual intensity map of [S II] λλ 6716, 6731. Right panel: Average radial velocities of [S II] λλ 6716, 6731 lines. The targets listed in Table 1 are identified in both maps.