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Table A.1

Selection of data.

Region f f pol f tot
[1020 cm-2] [%] [%] [%]

Taurus .................. 6.2 66 78 28
Ophiuchus .................. 5.6 65 82 31
Lupus .................. 9.6 65 67 24
Chamaeleon-Musca . 6.3 49 83 31
Corona Australia (CrA) 5.4 34 40 4

Aquila Rift .................. 18.4 48 96 32
Perseus .................. 5.3 60 59 16

IC 5146 .................. 26.4 38 93 29
Cepheus .................. 7.5 66 80 36
Orion .................. 6.1 63 67 24

ChamEast .................. 6.3 33 38 10
ChamSouth .................. 4.9 36 42 13

Notes. Mean column density of the background/foreground for each region estimated from a reference field at the same Galactic latitude; percentage f of all pixels where ; percentage fpol of all pixels where or (first polarization criterion) and where | Q | > 3σQ or | U | > 3σU (second polarization criterion); and percentage ftot of all pixels used for the HRO analysis.

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