Plummer fits of OMC-3 filament segment A, using the HR column-density map (angular resolution 20″). Frame c shows the filament segment as a 2D image (the top row containing the median profile), frame a the fit residuals, frame d the parameter estimates along the filament, and frame b the parameter histograms (cf. description in Fig. 3). The column-density map has an angular resolution of 20″, and the fitted area is [−90″, +90″] in the cross-filament direction.