Fig. 2.
Two measures of Fe xvv excess, ℛ0 and ℛ1 (see text for their definition), for the 21 discrete sources, Xp0 through Xp20. ℛ1 values in the bar plot are standardised. Seven selected Fe XXV (NB2)-excess source candidates are marked in red. Lower left: ℛ0–ℛ1 diagram. Lower right: CDFs of ℛ0 and ℛ1. In both panels, dotted lines indicate the adopted thresholds for the NB2-excess selection.
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