Table 3
Contamination and completeness of X-ray group detection in ECDF-S.
| Flux r < 32′′ | Contamination | Completeness at z = 0.6 | Flux significance at z = 0.6 |
|
|
|||
| 2.e-16 | 6% | 50 | 3. |
| 4.e-16 | 2% | 90 | 6. |
| 8.e-16 | 0% | 100 | 12. |
Notes. The important parameter for detection is surface brightness, which is converted to flux using a fixed detection aperture of 32′′ in radius. The contamination is also specific to the detection scales. The simulations of point source confusion are based on deeper Chandra data and use the actual XMM ECDF-S mosaic. Completeness is estimated based on simulations of halo detection, which exhibits a strong redshift dependence at low redshifts, with milder dependence seen above redshift of 0.6, selected for quotation here. Flux significance is quoted for the central part of ECDF-S.
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