...
(For each cluster all XIS instruments fitted simultaneously, allowing Oxygen column density of the contaminant to vary, see Tables 5 and 6 in Kettula et al., 2013) All clusters an
...
(For each cluster all XIS instruments fitted simultaneously, allowing Oxygen column density of the contaminant to vary, see Tables 5 and 6 in Kettula et al., 2013) All clusters an