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Table 1
SWIRE fields.
| Field name | Area | rms | Nsources | |
| (deg2) | (μJy) | (1.75′ rad) | ||
| (1) | (2) | (3) | (4) | |
|
|
||||
| ELAIS N1 | 6.73 | 28.0 | 7.16 | |
| ELAIS N2 | 4.60 | 28.3 | 7.83 | |
| CDFS | 7.69 | 27.9 | 7.16 | |
| Lockman | 7.81 | 29.6 | 7.27 | |
| XMM-LSS | 7.40 | 34.3 | 6.03 | |
Notes. Column 2: areas analysed, in Col. 3: rms values calculated for 
radii apertures (not aperture corrected). Column 4 states the average number of sources per 1.75′ radius circular cell. The total number of 1.75′ radius circular fields analysed in SWIRE is 9981 (area 26.7 deg2), totalling 72 295 sources.
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