5 × 5 deg2 box at 170° < l < 175°, −5° < b < 0° as observed in UVEX r band. This region is picked as representative of the more difficult and changeable (winter) observing conditions. Colours shown indicate the magnitude differences with respect to Pan-STARRS. Left: differences before calibration; centre: differences after calibration; right: differences after the small additional illumination correction is applied. White holes are excluded regions around bright stars.
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