Full ACS field of view. Lines corresponding to declination versus right ascension are drawn. Four annuli mark regions used in the photometry at 97′′−105′′,105′′−115′′, 115′′−125′′, and 125′′−155′′, and are drawn around the center of M 87. Note that the 155′′ circle does not show, because it is coincident with the bottom left corner of the ACS image. The central circle and the first two annuli are not used for final analysis due to crowding. Fig. 1 is the portion marked by a square in the lower left corner.
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.