Table 1
Observing log presenting all data acquired with VLTI/GRAVITY on HD 142527 and analysed in this paper.
| Epoch | Configuration(1) | Mode(2) | Nexp × NDIT × DIT | Airmass | Seeing (″) | Programme |
|---|---|---|---|---|---|---|
| 2017-03-19(†) | ATs Astro | Single, High, Combined | 7 × 10 × 30 s | 1.05–1.07 | 0.6–0.81 | 098.D-0488(A) |
| 2017-05-03 | ATs Large | Single, Medium, Combined | 2 × 30 × 10 s | 1.22–1.25 | 0.33–0.43 | Technical |
| Single, Medium, Split | 3 × 20 × 30s | 1.14–1.67 | 0.41–0.65 | |||
| 2018-02-17 | ATs Large | Single, Medium, Combined | 2 × 30 × 0.3 s | 1.86–2.28 | 0.48–0.67 | 60.A-9800(U) |
| 4 × 30 × 1s | ||||||
| Single, High, Combined | 2 × 20 × 10 s | 1.71–1.78 | 0.46–0.48 | |||
| 2018-07-25 | UTs | Dual, High, Split | 2 × 15 × 30 s | 1.05–1.05 | 1.10–1.54 | |
| 2×10×10s | ||||||
| Dual, Medium, Split | 2 × 20 × 10 s | 1.06–1.07 | 0.96–1.39 | 60.A-9800(U) | ||
| 2018-07-28 | UTs | Dual, Medium, Split | 2 × 15 × 10 s | 1.09–1.11 | 1.13–1.46 | 60.A-9800(U) |
| 2019-04-27(†) | ATs Medium | Single, Medium, Split | 2 × 10 × 30 s | 1.10–1.13 | 0.66–0.73 | 60.A-9132(A) |
| 2019-04-28 | ATs Medium | Single, Medium, Split | 2 × 10 × 30 s | 1.12–1.15 | 0.69–0.88 | 60.A-9132(A) |
| 2019-05-01 | ATs Medium | Single, Medium, Split | 4 × 10 × 30 s | 1.06–1.10 | 1.21–2.06 | 60.A-9132(A) |
| 2019-05-10(†) | ATs Small | Single, Medium, Split | 4 × 10 × 30 s | 1.06–1.25 | 0.64–1.09 | 60.A-9132(A) |
| 2021-01-08 | UTs | Dual, Medium, Combined | 8 × 32 × 1s | 1.70–1.80 | 0.59–0.81 | 1104.C-0651(C) |
Notes.(1) ATs: auxiliary telescopes; UTs: unit telescopes. A description of the AT configurations is available on the ESO website (https://www.eso.org/sci/facilities/paranal/telescopes/vlti/configuration/P105.html).(2) Single: single-field mode; Dual: dual-field mode. Medium or high: spectral resolution. Combined or split: polarisation setting.(†) We were not able to extract an astrometry from these datasets (see Sect. 3). They are listed here only for completeness, as they are available on the ESO archive.
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