Fig. 1

Grayscale montage of the 4552 Å Si III line recorded with the SOFIN spectrograph. The abscissa corresponds to the radial velocity in the frame of reference centered in m1 and the observations are stacked from bottom to top according to sequence number of the observation starting with the first spectrum obtained on 19 April.
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.