Plummer fits using 1D and 2D convolution to filaments of three different strengths. (First column) Components of the simulated filament. Median profile (solid blue line), original Plummer without noise (black dotted line) and with noise (solid pink line), the Plummer fit to only the Plummer with noise (dash-dotted line), the background sky (orange solid line), and the Plummer fit to the full simulated filament (blue dash-dotted line). (Second column) Individual profiles (solid lines) and 1-D Plummer fits (dashed lines) to each row of the profile. Median profile, and the median and mean Plummer fits are shown in black solid, dashed, and dash-dotted lines, respectively. (Third column) Same as the second column, but for the 2D Plummer fit. (Fourth column) The simulated filament.