Free Access
Fig. 3
WSRT continuum image. The contour levels range from −0.3, 0.3 mJy beam-1 to 250 mJy beam-1 with increasing factors of 1.5. The radio source E of Mrk 231 is an unrelated background/foreground object.
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.