Longitudinal field measurements for HD 43317 for various LSD linemasks. Left: deduced values from the individual Narval spectropolarimetric sequences. The archival spectropolarimetry (B13) is indicated in black, while the additional data presented here are indicated in red. The optimal LS minimization fit, representing the rotational modulation of a dipolar field, is given by the dashed blue line. We assumed P_rot = 0.897673 d and T₀ = 2 456 185.8380 d. Right: using the phase-binned data, indicated by the green squares.