The 78 tiles indicated were used to construct the final map. The background image is the 70-μm Herschel/PACS dust emission. The yellow contours correspond to an approximated far-ultraviolet radiation field of G0 = 50 (in Habing units). The colour of each tile indicates its corresponding OFF position: blue tiles use the COFF-SE1 position, red tiles use COFF-OFF1 and green tiles use COFF-C. Each square tile has a side length of 435.6 arcsec. The black box at the centre indicates the region mapped by the single-pixel Herschel/HIFI instrument in 9 h55. The total observing time for the SOFIA/upGREAT map was 42 h.