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Table 1

VLT/SPHERE polarimetric imaging data and corresponding observing conditions.

Epochs Object nDIT × DIT ncycle τ0 (ms) seeing (″) Air mass
ZIMPOL R band
Jun 11, 2015 RX J1604 2 × 120 s 6 2.4 ± 0.1 1.46 ± 0.17 1.01 ± 0.01
IRDIS H band
Jul 1, 2016(a) RX J1604 2 × 64 s 7 5.0 ± 0.7 0.58 ± 0.09 1.04 ± 0.02
Jun 22, 2018 Hen3-1258 1 × 96 s 4 7.1 ± 1.0 0.72 ± 0.05 1.07 ± 0.01
IRDIS J band
Aug 14, 2017 RX J1604 2 × 64 s 5 5.7 ± 1.0 0.61 ± 0.08 1.17 ± 0.04
Aug 15, 2017 RX J1604 2 × 64 s 4 3.7 ± 0.4 0.91 ± 0.13 1.22 ± 0.04
Aug 18, 2017 RX J1604 2 × 64 s 5 4.6 ± 1.1 0.53 ± 0.06 1.24 ± 0.05
Aug 19, 2017 RX J1604 2 × 64 s 4 4.0 ± 0.9 0.66 ± 0.07 1.02 ± 0.01
Aug 22, 2017 RX J1604 2 × 64 s 7(b) 5.9 ± 0.7 0.56 ± 0.10 1.12 ± 0.06
May 26, 2016 HD 150193A 6 × 16 s 11 5.5 ± 1.0 0.45 ± 0.07 1.04 ± 0.03
not selected J band data
Sep 5, 2017 RX J1604 2 × 64 s 4 1.9 ± 0.3 0.98 ± 0.16 1.20 ± 0.03
Sep 7, 2017(a) RX J1604 2 × 64 s 4 3.6 ± 0.3 0.53 ± 0.03 1.35 ± 0.05
Sep 17, 2017 RX J1604 2 × 64 s 4 2.6 ± 0.4 1.05 ± 0.18 1.37 ± 0.05

Notes. (a)Cloudy weather conditions according to the Astronomical site monitor (ASM). (b)One cycle is discarded because the centering failed.

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