Image Details
 
                    Caption: Figure 4.
Galactic ﹩{{N}_{{\rm H}}}﹩ column density for all of the Swift fields (black solid line), and those with Galactic latitudes of ﹩|b|\geqslant 5﹩ (red dashed line), ﹩|b|\geqslant 10﹩ (green dotted line), and ﹩|b|\geqslant 20﹩ (blue dotted–dashed line), respectively.
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