Fig. 2.

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Geometry showing the region of radio and γ-ray visibility depending on the magnetic obliquity, χ, and line of sight, ζ. The red area corresponds to γ-ray-only, the blue area to radio-only with ρ = 20°, and the magenta area to radio-loud γ-ray visibility. Due to the symmetry of the plot, the three other quadrants with χ ≥ π/2 or ζ ≥ π/2 are not shown.
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