File:Apjlab0e85f15 EHT-images-M87-four-days.jpg

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English: Averages of the three EHT fiducial images of M87 for each of the four observed days after restoring each to an equivalent resolution. The indicated beam is 20 μas (i.e., that of DIFMAP, which is always the largest of the three individual beams).
Date
Source (2019). "First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole". The Astrophysical Journal 875 (1). DOI:10.3847/2041-8213/ab0e85. ISSN 20418213. Figure 15
Author The Event Horizon Telescope Collaboration
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