Table 1
Overview of observational data sets.
| Date | Instrument | Mode | Filter | DIT [s] × NDIT | PC | ttot [min] | Seeing [′′] | H-band Strehl [%] | |
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|
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| 2015 May 30 | IRDIS | IRDIFS | DB_H2H3 | 64 × 96 | – | 102 | 0.5–0.85 | 27 ± 13 | |
| 2015 May 30 | IFS | IRDIFS | YJ | 64 × 96 | – | 102 | 0.5–0.85 | 27 ± 13 | |
| 2016 February 19 | IRDIS | DPI | H | 32 × 1 | 30 | 64 | 0.9–1.0 | 76 ± 4 | |
| 2016 March 31 | ZIMPOL | P2 | VBB | 40 × 2 | 18 | 96 | 0.8–1.1 | 87 ± 3 | |
Notes. Both filters of ZIMPOL were set to the Very Broad Band (VBB) filter covering a wide wavelength regime from R- to I-band. The following coronagraphs were used: N_ALC_YJH_SDIT for IRDIS/IFS and V_CLC_S_WF for ZIMPOL. DIT stands for the detector integration time and NDIT corresponds to the number of frames in the sequence. PC indicates the number of polarimetric cycles. The Strehl is calculated for the H-band. This leads to a Strehl of ~43% for the ZIMPOL data at 0.65 μm.
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