Upper panel: the filament that was located using DisPerSE. The background image is of the high-resolution column density map. Lower panel: the profile taken from the low-resolution column density map using the skeleton shown in the upper panel in white. The x-axis runs fromsouth-east to north-west. The black line is the mean value of the column density at that radius. The dispersion of column densities along that radius is shown in orange. The areas that were integrated to calculate the asymmetry are shaded in green and blue. The vertical dashed line shows the crest position of the filament, and the horizontal dashed line shows the arbitrary background level of the profile. The small dashed curve on the left side of the mean column density curve is the additional column density contribution from the YSO, S CrA, which was manually subtracted from the mean column density profile.