Open Access
Table 1.
Observing log.
| Date UT | Filters | DIT × NDIT × Nexp | AM | Δpar | DIMM seeing | τ0 | TNcorr | Plate scale |
|---|---|---|---|---|---|---|---|---|
| (yyyy-mm-dd) | (s) | (°) | (″) | (ms) | (°) | (mas pix−1) | ||
| 2014-12-08 | IRDIS-K1K2 | 4 × 40 × 36 | 1.12 | 16.4 | 0.75 | 4.4 | −1.71 | 12.251 |
| 2015-02-05 | IRDIS-H2H3 | 4 × 40 × 8 | 1.16 | 43.0 | 0.78 | 7.8 | −1.72 | 12.255 |
| 2015-10-01 | IRDIS-H2H3 | 4 × 16 × 2 | 1.15 | 22.8 | 1.42 | 1.0 | −1.81 | 12.250 |
| 2015-11-30 | IRDIS-H2H3 | 4 × 80 × 32 | 1.12 | 39.9 | 1.06 | 10.1 | −1.75 | 12.255 |
| 2015-12-26 | IRDIS-H2H3 | 8 × 98 × 20 | 1.12 | 36.6 | 1.44 | 2.1 | −1.79 | 12.255 |
| 2016-01-20 | IRDIS-H2H3 | 4 × 60 × 30 | 1.12 | 29.3 | 0.60 | 3.0 | −1.81 | 12.255 |
| 2016-03-27 | IRDIS-H2H3 | 8 × 20 × 32 | 1.28 | 19.9 | 0.74 | 1.7 | −1.77 | 12.255 |
| 2016-04-16 | IRDIS-H2H3 | 8 × 42 × 32 | 1.42 | 17.9 | 0.65 | 6.0 | −1.74 | 12.255 |
| 2016-09-16 | IRDIS-H2H3 | 8 × 16 × 8 | 1.17 | 38.6 | 0.32 | 1.2 | −1.76 | 12.255 |
| 2016-10-14 | IRDIS-H2H3 | 16 × 8 × 10 | 1.12 | 53.8 | 0.75 | 3.0 | −1.76 | 12.255 |
| 2016-11-18 | IRDIS-H2H3 | 2 × 64 × 50 | 1.12 | 39.8 | 0.96 | 2.0 | −1.76 | 12.248 |
| 2018-09-17 | IRDIS-H2H3 | 2 × 30 × 46 | 1.17 | 36.6 | 0.69 | 3.7 | −1.79 | 12.239 |
Notes.
AM stands for the mean airmass, Δpar for the variation in parallactic angle during the coronagraphic sequence, TNcorr for true north correction (TN is the angle between the north position and the detector “North”). Seeing and coherence time (τ0) are mean values throughout the coronagraphic sequence.
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