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Table 1.
Detection statistics and sample properties.
| Sample over the HETDEX & H-ATLAS/NGP fields | Number |
|---|---|
| All quasar sample over the HETDEX and H-ATLAS/NGP | 49 972 |
| LOFAR sources with false optical counterparts | 47 |
| LOFAR sources with correct optical counterparts | 49 925 |
| Quasars selected by their optical colours, regardless of their FIRST counterparts (CS) | 49 740 |
| Quasars selected by the FIRST match criterion (FS) | 185 |
| Quasars selected by their optical colours, regardless of their FIRST counterparts, detected by LOFAR (CSD) | 16 077 |
| Quasars selected by their optical colours, regardless of their FIRST counterparts, LOFAR limits (CSL) | 33 663 |
| Quasars selected by the FIRST match criterion detected by LOFAR (FSD) | 178 |
| Quasars selected by their FIRST match criterion, LOFAR limits (FSL) | 7 |
| Quasars that have measured nuclear properties | 30 897 |
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