Free Access

Fig. 9


a) Focusing factor of the simulated rings. b) Predicted 3σ detection sensitivities for continuum emission, assuming an exposure time of ΔT = 100 ks and ΔE/E = 1 / 2. The background was set at 1.5 × 10-4 counts cm-2 s-1 keV-1, taking into account the average detection efficiency ηd = 0.5 and the average attenuation factor fat = 0.9.

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.