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Table 3

Column density of ionised matter (Parkin et al. 2011) used to correct observed emission for Thomson scattering.

ϕ NH (1023 cm−2)
2.9389 1.5
2.9393 1.5
2.9669 2.5
2.9721 2.5
2.9979 40
3.0051 50
3.0089 45
3.0275 15
3.1719 5

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