Fig. 3.

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Cross-sections of a uniform cylindrical shell after convolution with the restoring beam compared with actual cross-sections of the cylindrical jet base. The emissivity is constant in the range 20 μas < z < 100 μas, then fades linearly to 25% of this value in the range 100 μas < z < 200 μas, and is zero elsewhere. The middle frame indicates that W/R = 0.1 is too narrow.
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