Fig. 5.
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Historical 230 GHz amplitude measurements of Sgr A* from 2005 to 2019 in Table 4 of Wielgus et al. (2022a) and average flux density and standard deviation from Table E.1. The 2017 and 2018 EHT observing campaigns are marked by black vertical lines. Standard deviations for both the 2017 and 2018 EHT observations are plotted, but are too small to be visible.
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