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Table 4.

Polarimetric accuracy of measuring the degree and angle of linear polarization of a 1% polarized substellar companion and a 30% polarized circumstellar disk in the Y-, J-, H-, and Ks-band before the re-aluminization of M1 and M3.

Filter sDoLP (%) sAoLP (°) sDoLP (%) sAoLP (°)
(%) 1% pol. 1% pol. 30% pol. 30% pol.
companion companion disk disk
BB_Y 0.069 1.9 0.28 0.21
BB_J 0.051 1.4 0.17 0.13
BB_H 0.032 0.86 0.20 0.14
BB_Ks 0.11 3.0 0.26 0.20

Notes. The results after the re-aluminization are comparable.

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