Comparison of KiDS GAaP photometry before and after homogenization to SDSS DR13 for all tiles in KiDS-North as function of right ascension and declination. Top: the magnitude offsets with respect to SDSS before applying photometric homogenization are indicated by the colour scaling. The size of the circles represent the average PSF size in each coadded image. From top to bottom the panels correspond to the u, g, r, and i filters. Bottom: same as top panel, but after applying photometric homogenization.
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