Fig. 4.
Hα spectroheliograms at +0.1 nm and at line center (center and right panels, respectively) at a viewing angle of μ = 0.5. The EB is located at x = 17 Mm. Because of the projection effect of looking from the side, this corresponds to x = 11 when viewed from directly above. The line profile over the EB, shown in the left panel, is located at [x, y] = [17, 11] Mm and is evident in the line wings.
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