Point spread functions derived from the noise filter centred at the positions of their subfields. The PSFs are shown magnified in scale with inverted intensity to emphasise asymmetry and ringing. The bottom and left axes represent the full field coordinates of the position of each PSF, the top and right axes show the dimension of each PSF. The GAOS lock point is marked by the black circle. The red and black squares correspond to Fig. 5.
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