Free Access
Fig. 2

20–50 keV and 2–10 keV fractional variability amplitudes (black solid squares, this work, and open squares, from Sobolewska & Papadakis 2009, respectively) plotted as a function of BH mass.
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.