Fig. 9.
Check of the illumination corrections, through direct comparison of star magnitudes with Gaia. Each panel shows the median difference between a KiDS-DR4 r-magnitude and Gaia-DR2 G-band magnitudes, as a function of (X, Y) position in the focal plane. Stars in the range 18 < r < 19 with 0.7 < (g − i)0 < 1.5 are used, on the flat part of the relation shown in Fig. 6. Top row: results for the tiles in KiDS-N, bottom row: for those in KiDS-S. THELI MAG_AUTO is shown on the left, MAG_GAAP_r on the right.
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