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Table 7
Optical identifications of extended sources.
| Source | Identification | Redshift | Δz/(1 + z) | |||||
| Seq. # | XMMU J.. | zspec | zphot | zbcg | publ. | X-ray | % | |
|
|
||||||||
| 1 | 221536.8–174534 | cluster | 0.41 | 0.46 | 0.47 ± 0.05 | 0.4a,0.3d | 0.37–0.4 | + 3.7 |
| 2 | 221558.6–173810 | cluster | – | 1.34 | 1.37 ± 0.06 | 1.45b,1.37e, 1.2a | 0.9–1.6 | −4.5 |
| 3 | 221500.9–175038 | cluster | 0.34 | 0.29 | 0.42 ± 0.03 | 0.3a,0.38e | – | −3.4 |
| 4 | 221557.5–174029 | cluster | 1.00 | 0.90 | 0.98 ± 0.04 | 0.95e | 0.9–1.2 | −5.0 |
| 5 | 221556.6–175139 | cluster | 1.23 | 1.12 | 1.23 ± 0.04 | 1.17c | >0.9 | −4.8 |
| 6 | 221503.6–175215 | cluster | 0.41 | 0.42 | 0.49 ± 0.06 | – | – | + 0.8 |
| 7 | 221546.2–174002 | empty field | – | – | – | – | – | |
| 8 | 221551.7–173918 | empty field | – | – | – | – | – | |
| 9 | 221624.3–173321 | point source | – | – | – | – | – | |
References. The column “redshift publ.” lists redshifts from already published works. The last column gives the difference, in percent, between the spectroscopic redshift and the photometric redshift of the BCG.
(a)
Olsen et al. (2007); spectroscopic redshift,
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