Table 2.
Observation logs of our target AGNs observed with GRAVITY.
| Object | Dates | Total on-source time | Ave. Seeing | Ave. Coherence time | Astr. Accuracy |
|---|---|---|---|---|---|
| (min) | (″) | (ms) | μas | ||
| Mrk 509 | 25, 26 Jul. 2021 | 100 | 0.66 | 3.2 | 48.0 |
| PDS 456 | 26, 27 Aug. 2018 | 295 | 0.66 | 4.8 | 12.8 |
| 14, 15, 16, 18 Jul. 2019 | |||||
| 12, 16 Aug. 2019 | |||||
| 27 Jul. 2021 | |||||
| Mrk 1239 | 7, 30 Jan. 2021 | 366 | 0.72 | 6.8 | 32.7 |
| 1 Feb. 2021 | |||||
| 1, 2, 31 Mar. 2021 | |||||
| IC 4329A | 1 Feb. 2021 | 210 | 0.76 | 5.2 | 47.4 |
| 1, 2, 31 Mar. 2021 | |||||
Notes. The table shows the dates, total on-source time of all the data used in the analysis after rejection via our fringe tracking ratio criterion, weather conditions (average seeing in arcseconds and coherence time in ms), and astrometric accuracy at the line peak (estimated from the photocentre fitting results; discussed more thoroughly in Sect. 4) of our observations.
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