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Fig. 1.
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Event Horizon Telescope (u, v)-coverage of the OJ 287 observations on April 5, 10, and 11, 2017. Each colored point corresponds to a single VLBI scan of ∼5 min. Dashed line circles indicate the fringe spacing of 50 μas and 25 μas. “Chile” represents the stations ALMA and APEX. “Hawai’i” represents the stations SMA and JCMT.
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