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Table 1

Measured relative quadrant polarization parameters for HR 4796A, deviations Δ (in %) from left–right symmetry and ratios Λ for back–front flux ratios.

Stokes Qd quadrants Stokes Ud quadrants
Relative quadrant polarization (errors: ≈ ± 0.010)
− 0.04 (a) − 0.031
+ 0.385 + 0.212
− 0.076 (b) − 0.159
+ 0.343 + 0.033
Quadrant sums (errors: ≈ ± 0.030)
+ 0.652 (c) + 0.055
0.804 (c) 0.435
Left–right asymmetry parameters
+ 6 ± 2% + 14 ± 4%
− 3 ± 23%
Back–front parameter ratios
<0.6 0.15 ± 0.07
0.21 ± 0.09
Special back–front parameter ratios
Λa = (|Q090| + |Q270|)∕(2 |Q180|) 4.8 ± 0.7
Λb = (|Q090| + |Q270|)∕(|U135| + |U225|) 2.0 ± 0.2

Notes. (a)Strongly affected by noise, the expected signal is |Q000| < 0.01; (b)errors: ≈ ± 0.020; (c)Q000 is not included in ΣQxxx.

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