Fig. 5.
Black: average radial y profile of 24 544 filaments. The 1σ uncertainty is estimated by bootstrap resampling, shown in gray. Cyan: average radial y profile from 1000 null tests (see Sect. 3.3). The 1σ uncertainty is estimated by computing a standard deviation of 1000 null profiles. For each null test, 24 544 filaments are moved in Galactic longitude by random amounts.
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