P. Kalberla, J. Kerp, U. Haud, B. Winkel, N. Bekhti, L. Floeer, and D. Lenz. (2016)cite arxiv:1602.07604Comment: 62 pages, 27 figures, ApJ accepted, a high resolution version is available at https://www.astro.uni-bonn.de/hisurvey/AllSky_profiles/filaments.pdf.