Table 1.
Exposure time and weather conditions for the observations.
| Date | On-source | Seeing | Coherence |
|---|---|---|---|
| time (min) | (″) | time (ms) | |
| 2018 Nov 20 ( * ) | 55 | 0.65−0.97 | 3.3−4.2 |
| 2019 Feb 16 ( † ) | 75 | 0.53−0.95 | 6.0−9.1 |
| 2019 Nov 07 ( * ) | 85 | 0.36−0.71 | 6.5−10.7 |
| 2019 Nov 09 ( * ) | 30 | 0.42−0.58 | 2.4−4.2 |
| 2019 Dec 09 ( * ) | 45 | 0.50−0.71 | 1.8−3.9 |
| 2020 Feb 09 | 55 | 0.47−0.69 | 13.2−15.4 |
| 2020 Feb 10 ( † ) | 75 | 0.51−0.99 | 7.7−13.2 |
| 2020 Mar 08 ( † ) | 45 | 0.49−0.80 | 7.1−9.9 |
Notes. The reported data only include exposures for which we were able to track the fringe for > 80% of the exposure time. The seeing and coherence time are based on measurements from the Differential Image Motion Monitor and Multi-aperture Scintillation Sensor on Paranal. ( * )K stars are observed as calibrators. ( † )B stars are observed as calibrators.
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