Table 1
Log of observations with the atmospheric conditions for each run.
| Date | Observation | Field | Observing conditions (on average) | |||
|---|---|---|---|---|---|---|
| identificationa | offset (°) | Airmass | Seeing (′′) | Coherence time (ms) | Wind speed (m s−1) | |
| 2015-06-21 | OBS172_0004-0036 | 0 | 1.32 | 1.39 | 1.1 | 7.9 |
| 2015-06-26 | OBS177_0010-0042 | 120 | 1.31 | 0.78 | 3.5 | 6.7 |
| 2015-07-12 | OBS193_0049-0081 | 60 | 1.33 | 1.41 | 0.9 | 1.8 |
| 2015-09-06 | OBS249_0028-0060 | 0 | 1.35 | 0.93 | 3.8 | 9.0 |
| 2015-09-06 | OBS249_0061-0094 | 60 | 1.47 | 1.11 | 3.4 | 8.7 |
| 2015-09-07 | OBS250_0002-0034 | 120 | 1.55 | 2.01 | 1.0 | 16.1 |
Notes. (a) The observation identification corresponds to the fits-file header keyword “origname” without prefix “SPHERE_ZIMPOL_”. The first three digits give the day of the year followed by the four-digit observation number. Instrument setup for the deep imaging mode: fast polarimetry, VBB filter, derotator mode P2, coronagraph V_CLC_MT_WF, and total exposure time for each run 42.7 min. Instrument setup for the flux calibration mode: fast polarimetry, VBB filter, density filter ND2, derotator mode P2, and total exposure time for each run 14.4 s.
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