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Fig. 11

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Ks-band completeness test for two 2000 × 2000 pixels2 () fields from the bulge area of the VVV survey. The fields were selected to represent a less crowded region (tile b204) as well as one of the most crowded regions near the Galactic Centre (tile b314). Solid points correspond to b204, whereas open diamonds represent b314. In addition we applied selection criteria to define a confirmed source detection in our AS experiments (see text for details). Solid lines show the completeness fraction if a source was detected within a radius  ≤ 1 pixel of its original position. Reducing this radius to 0.5 pixel and requiring the original Ks-band magnitude to be recovered within 0.5 mag results in the completeness curves shown with dashed lines.

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