Figure 5.
We show the number of confirmed quasars deg−2 (g < 20.5) against the number of stellar sources deg−2 (with g < 21.5). We compare the two algorithms; ugriXDQSO (red circles) and ugriXDQSOW1W2 (blue triangles). By limiting the comparison to brighter quasars we assume the contribution of observational effects is negligible.

We show the number of confirmed quasars deg−2 (g < 20.5) against the number of stellar sources deg−2 (with g < 21.5). We compare the two algorithms; ugriXDQSO (red circles) and ugriXDQSOW1W2 (blue triangles). By limiting the comparison to brighter quasars we assume the contribution of observational effects is negligible.

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