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Table 1

Observational fossil and normal groups.

Fossil groups z σ v rvir LX
[km s-1] [h-1 Mpc] [erg  s-1 × 1043]

RXJ1340+4018 0.171 706 1.05 1.24
RXJ1159+5531 0.081 435 1.08 1.14
RXJ1416+2315 0.138 500 1.49 6.09
RXJ1552+2013 0.136 459 1.22 2.29
Normal Groups

400d-177 0.169 680 1.22 2.55
400d-081 0.064 449 1.25 2.24
400d-151 0.160 502 1.06 1.26
400d-180 0.167 452 1.33 3.88

Notes. Normal groups were extracted from the 400d Cluster Catalogue http://hea-www.harvard.edu/400d/catalog/table_cat.html

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