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Table 1.

Breakdown of spectroscopic redshift labels, as given by the surveys considered in this work and the rectified number of sources.

Initial labels
Final labels
hclass Label N sources hclass Label N sources
STAR 0 7689 STAR 0 7731
GAL 1 11 391 GAL 1 36 763
AGN 2 495 AGN
QSO 3 4192 QSO 2 4192
Unknown −1 25 414 Unknown

Total 49 181 Total 48 686

Notes. We removed all AGN sources from our sample, and attribute “unknown” labelled sources as either stars (z <  0.0015) or galaxies (z >  0.0015).

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