VLT/FORS2 20″ × 20″ co-added R-band image (9300 s integration time) of the RBS 1774 field (north to the top, east to the left). The computed position of the candidate counterpart is marked by the cross. For better visualisation, the cross arms (0''̣25) are equal to 20 times the 1σ uncertainty of our relative astrometry. The circle ( radius) corresponds to the position uncertainty due to the unknown neutron star proper motion for, e.g. a transverse velocity of 400 km s^-1 and a distance of 300 pc.