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Table 1
Number of quasars for each catalog of the LQAC-3 compilation with the corresponding number of quasars in common with the SDSS catalog.
| Catalog | Flag | Nature | Nbs of | Nb. of |
| name | quasars | quasars | ||
| (LQAC-3) | common | |||
| with SDSS | ||||
|
|
||||
| ICRF2 | A | radio | 3414 | 506 |
| VLBA | B | radio | 7213 | 951 |
| VLA | C | radio | 1858 | 356 |
| JVAS | D | radio | 2118 | 451 |
| 2QZ | F | optical | 23 660 | 3271 |
| 2df-SDSS LRG | G | optical | 9058 | 1923 |
| FIRST | H | radio | 969 | 801 |
| HB | I | opt. and radio | 6720 | 2102 |
| 2MASS | J | infrared | 21 884 | 18 433 |
| GSC2.3 | K | optical | 144 508 | 113 213 |
| B1.0 | L | optical | 139 192 | 111 121 |
| V&V | M | optic. and radio | 79 692 | 25 191 |
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