Table 1.
GC observing nights selected for Sgr A* imaging.
| Date | Available | |||
|---|---|---|---|---|
| exposures | Nexp | ⟨σρ⟩ | ⟨σϕ⟩ | |
| 2021-03-30 | 13 | 13 | 4.5 × 10−2 | 33.2° |
| 2021-05-22 | 20 | 19 | 3.3 × 10−2 | 10.5° |
| 2021-05-29 | 22 | 21 | 3.5 × 10−2 | 19.3° |
| 2021-05-30 | 20 | 20 | 3.7 × 10−2 | 24.3° |
| 2021-06-24 | 32 | 29 | 3.6 × 10−2 | 20.7° |
| 2021-07-25 | 28 | 22 | 3.1 × 10−2 | 15.3° |
| 2021-07-26 | 20 | 20 | 3.6 × 10−2 | 19.6° |
| 2021-07-27 | 20 | 19 | 2.8 × 10−2 | 10.3° |
Notes. Each exposure amounts to a 320 s integration time. For some nights, we deselected exposures which were affected by bad weather or instrumental problems, such that the number of exposures used in the imaging, Nexp, is smaller than the total number of exposures available. The last two columns give the mean standard deviation of the closure phases and amplitudes. If a scaling factor was applied to the error bars, this is included.
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.