Open Access
Table 4.
Overlapping area between photometric catalogues and 4XMM observations.
| Catalogue | Total area | Overlap | Band | Xmatch |
|---|---|---|---|---|
| covered | with | mode | ||
| 4XMM | ||||
| (deg2) | (deg2) | |||
| AllWISE | all-sky | 1152 | ir | s |
| Gaia DR2 | all-sky | 1152 | opt | s |
| UCAC4 | all-sky | 1152 | opt | |
| 2MASS | all-sky | 1152 | ir | s |
| APASS | all-sky | 1126 | opt | s |
| Akari | 39 406 | 1108 | farir | x |
| GMRT | 36 996 | 1000 | radio | |
| NVSS | 34 069 | 927 | radio | x |
| PanStarrs DR1 | 32 134 | 881 | opt | s |
| GalexGR67 | 26 249 | 696 | uv | s |
| GLEAM | 25 423 | 657 | radio | |
| SkyMapper | 19 585 | 550 | opt | s |
| SDSS12 | 14 520 | 504 | opt | s |
| FIRST | 10 847 | 427 | radio | x |
| VHS | 13 670 | 364 | ir | |
| XMM-OM-SUSS41 | 348 | 343 | uv | s |
| SUMSS | 8354 | 216 | radio | |
| UKIDSS LAS | 3695 | 174 | ir | |
| VST | 3988 | 86 | opt | |
| Galex MIS | 1880 | 83 | uv | |
| VPHAS | 670 | 77 | opt | |
| UKIDSS GPS | 1366 | 76 | ir | |
| WBH2005 20 | 614 | 72 | radio | |
| Glimpse | 471 | 70 | ir | |
| IPHAS | 1888 | 59 | opt | |
| WBH2005 6 | 164 | 35 | radio |
Notes. The last column shows the way the catalogue was processed, either using the ARCHES multi-catalogue statistical cross-match (s) or using a simple positional cross-match (x).
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