Fig. 5.

Direct comparison between Y-band magnitudes from optical and infrared surveys, in the AB reference system, for objects with reliable photometry in an overlap of VISTA and DES/PanSTARRS. The thick dashed lines follow YPS/DES = YVISTA, and the dotted lines delimit offsets of one magnitude, enclosing > 95% of the sources. A small systematic difference can also be attributed to the slightly different filters used in the different surveys. The comparison between DES and VISTA magnitude (upper panel) shows ≈15 000 bright saturated objects with YDES > YVISTA + 1. This is less apparent in PS1, due to its smaller primary mirror and hence fewer saturation issues. The grey (resp. magenta) objects have YVISTA magnitude errors larger (resp. smaller) than 0.5 mag.
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