Fig. 2
XSS soft-band (0.2–2 keV) count rate versus the hard band (2–10 keV) count rate. Sources detected in both the hard and soft bands are plotted as squares, whereas those for which the soft-band measurement is an upper limit (corresponding to 4 net counts) are shown as (red) pluses. Error bars are shown for one high and one low-count rate source for illustration. The dotted diagonal lines correspond to soft to hard count-rate ratios of 1:1 and 10:1.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.