Fig. 4

Comparison of the EPIC-pn spectra at four different orbital phases of 9 Sgr. We caution that the variations of the instrumental sensitivity might bias this comparison with increasing age of the mission. The data at φ = 0.627 were taken 12−13 years before those at the other phases and therefore probably benefit from a higher sensitivity of the instrument. The sensitivity very likely remained essentially unchanged between the three other pointings.
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.