Integrated intensity of NANTEN2 data over velocity intervals of 0.3 km s⁻¹. The black contours at = 5 × 10²¹ cm⁻² from the Herschel data indicate the center of the filemant crest. These black contours are best visible at velocities between 2.7 and 3.6 km s⁻¹ when there is ¹²CO(1–0) emission towards the crest. The grey contour, at = 2 × 10²¹ cm⁻², indicates the area that encloses the strands. It can be observed that there is some extended emission east of the Musca filament and that the filament crest is not at the middle of the area containing the strands.