Fig. 3

image

Observed magnitude distribution of all optical objects present in the zDec band catalogue within a radius of 3 arcsec around each radio source is shown by the solid black histogram. The expected distribution of background objects in the same area, estimated using the procedure described above, n(m) is shown by the blue dashed histogram. The difference between these two distributions, q(m), is shown by the red dot-dashed histogram

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