Width distributions for four different width calculation methods (Gaussian, Plummer-like with p = 2 and p = 4 and second moment, as shown in Fig. 5) when the filamentaspect ratio and the reduced chi-squared criteria are varied. Top four panels: distributions of all filaments and intensity profiles fitted with a reduced chi-squared less than or equal to two. Middle four panels: width distributions for filaments with aspect ratios larger than two and fits with chi-squared less than or equal to six. Bottom four panels: width distributions for filaments with aspect ratios larger than two and reduced chi-squared values less than or equal to two.