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Fig. 11.

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Histograms of the G351.77 cleanest self-calibrated continuum data, which illustrate the noise distribution. The left panel shows B3, the right B6. The inset shows a linearly-scaled zoom-in to the ±5σ region centered around zero, with the residual of the histogram minus the noise model shown below. The noise model is a Gaussian with width calculated from the median absolute deviation estimated from a signal-free area of the field as described in Sect. 3.3.1.

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