Free Access
Fig. 2.
NVSS image at 1.4 GHz with the SRT contours at 6.6 GHz. Levels start at 2 mJy beam−1 and increase by a factor of two. The inset shows a detail of the M 31 ring. The extended emission of the central region (grey area) has been excluded from the point-source search.
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.