Fig. 6
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Reduced ACF function of 
for the Polaris flare. Left panel: without filter. Middle panel: with a high pass Alter filtering scales smaller than L/2. Right panel: with a low pass Alter Altering scales larger than L/2. Contours from black to purple to blue to light blue give the value of the reduced ACF at 0.5, e–1 ≃ 0.37, 0.1, −0.1.
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