Table 2
Observations of Wray 15-788 carried out with SPHERE/IRDIS.
| Observation date | Mode (a) | Filter | NDIT × DIT (b) | Δπ (c) | ⟨ω⟩ (d) | ⟨X⟩ (e) | ⟨τ0⟩ (f) |
|---|---|---|---|---|---|---|---|
| (yyyy-mm-dd) | (1 × s) | (°) | (′′) | (ms) | |||
| 2018-05-14 | CI | H | 4 × 32 | 0.86 | 0.86 | 1.30 | 2.55 |
| 2018-05-14 | CI | Ks | 4 × 32 | 0.87 | 0.85 | 1.30 | 2.15 |
| 2018-06-05 | DPI | H | 4 × 64 | – | 0.99 | 1.30 | 1.48 |
Notes. (a) Observation mode is either classical imaging (CI) or dual-polarization imaging (DPI). (b) NDIT describes the number of dithering positions and DIT is the detector integration time per dithering position. (c) Δπ describes the amount of field rotation during the observation, if it is carried out in pupil-stabilized mode (only valid for CI observations). (d) ⟨ω⟩ denotes theaverage seeing conditions during the observation. (e) ⟨X⟩ denotes theaverage airmass during the observation. (f) ⟨τ0⟩ denotes the average coherence time during the observation.
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