Fig. 2
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Illustration of correction procedure with 1-pix wide rings. Left: 1-pix wide ring 
with radius r = 30 pix or r = 0.37″ in IRDIS pixel scale. Middle: convolved image 
with radius r = 30 pix, obtained after the convolution process with IRDIS J-band PSF from 16-06-22. Right: Correction function f(r). The blue dot indicates the local correction factor at 30 pix calculated from the left images.
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