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Table 1
List of the SPHERE/IRDIS η Telescopii observations used in this work.
| Date (UT) | ESO ID – PI | IRDIS filter | DIT × NDIT | ∆PA | Seeing (″) | Avg. coherence time (s) |
|---|---|---|---|---|---|---|
| 2015-05-05 | 095.C-0298(A)- Beuzit | DB_H2H3 | 32 × 8 | 46.83 | Mostly 0.9−1.5(a) | 0.0011 |
| 2016-06-15 | 097.C-0394(A)- Milli | BB_H | 8×8 | 18.17 | 1–1.4 | 0.0024 |
| 2017-06-15 | 198.C-0209(H)- Beuzit | DB_H2H3 | 32 × 12 | 2.04 | 1.5–2 | 0.0023 |
| 2018-05-08(b) | 1100.C-0481(G)- Beuzit | – | – | – | – | – |
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