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Table 1

Observing log.

Observing date Setup DIT × NDIT × Nexp AM Δpar Seeing τ0 Astrom. field TN Scale
(s) (°) (″) (ms) (°) (mas pix−1)
2018-10-17 IRDIFS 2 × 30 × 54 1.12 54.5 1.03 3.2 47tuc −1.804 ± 0.045 12.248 ± 0.009
2018-12-14 IRDIFS 2 × 30 × 32 1.12 33.3 0.47 5.8 47tuc −1.764 ± 0.021 12.248 ± 0.005
2019-03-10 IRDIFS 12 × 19 × 16 1.12 32.1 0.71 5.4 ngc3603 1.764 ± 0.065 12.255 ± 0.015
2019-11-02 IRDIFS 3 × 23 × 32 1.12 32.2 0.87 3.4 ngc3603 −1.773 ± 0.065 12.248 ± 0.005
2019-12-21 IRDIFS 4 × 17 × 30 1.13 30.6 0.65 7.6 47tuc −1.771 ± 0.081 12.245 ± 0.017
2020-02-07 IRDIFS 4 × 17 × 32 1.12 30.7 0.60 5.1 47tuc −1.771 ± 0.081 12.245 ± 0.017

2018-09-22 GRAVITY-MED 30 × 10 × 17 1.19 52 0.77 6.7
2019-09-12 GRAVITY-MED 10 × 32 × 3 1.9 4.3 1.6 1.2
2019-11-09 GRAVITY-HIGH 100 × 8 × 5 1.44 21.4 0.78 5.4
2019-11-11 GRAVITY-HIGH 100 × 8 × 5 1.17 33.7 0.79 3.4
2020-01-07 GRAVITY-HIGH 100 × 8 × 6 1.25 32.1 1.65 1.7
2020-01-07 GRAVITY-MED 10 × 32 × 3 1.16 8.8 2.84 1.2
2020-02-09 GRAVITY-MED 10 × 32 × 2 1.26 21 0.74 13.4

Notes. DIT × NDIT × Nexp refers to the IRDIS observations. AM stands for the mean airmass, Δpar for the variation of the parallactic angle during the coronagraphic sequence, TN for true north, and Scale for Plate Scale. The seeing and coherence time are mean values along the coronographic sequence. Plate scales and TN were measured on noncoronagraphic data.

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