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Fig. 2

image

Results of our reliability analysis for sources where an elongation should be detectable given the observed (u,v) coverage, signal-to-noise ratio and minimum visibility. First column: (u,v) coverage of the object. The point source fraction (fpt) and typical uncertainty of the interferometric measurements (erravg in percentage) are given for every object. Second column: probability density function of the axis ratio for three different input axis ratios: ϵ = 1 in red, ϵ = 2 in green, and ϵ = 3 in blue. For visualization purposes, we normalized the maximum value of the PDF’s to a value of one. Third column: probability density function of the recovered position angle of the major axis minus the input position angle. The colors are the same as for the second column. Intentionally, we do not plot the resulting PDF for an input axis ratio equal to 1. Fourth column: two-dimensional confidence interval for the axis ratio and FWHM of the minor axis from the fits using data from actual observations. The 1σ, 2σ, and 3σ region are delimited by purple, orange, and red lines, respectively.

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