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Table 1

Number of quasars from the basic catalogue with redshift deviations  |zhere − zSDSS|  > |Δzmax.

 | Δz | max =  0.05 0.1 0.5 1.0 2.0

8  212 quasars found in the QC DR5:
N( > | Δz | max) 22 5 3 1 0
1  643 quasars not found in the QC DR5:
N( > | Δz | max) 391 381 314 167 51

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