Free Access
Fig. 36
Combined spectrum around the O-edge for Mrk 421 and PKS 2155-304 with the expected absorption from the ISM alone (dashed line) and in combination with the instrumental component (solid). The feature at 22.7 Å is not visible in other sources and is therefore of astrophysical origin.
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.