Open Access

Fig. 5


Emission durations vs. Jupiter-observer distance. Dots represent the duration of all emission events in our 26-yr database. The histogram in black, corresponding to the scale on the right side, displays the number of dots per 0.1 AU interval. The black solid line is the median duration per 0.1 AU interval. The blue solid line is the robust mean duration per 0.1 AU interval (computed by excluding iteratively the points outside of a m ± 3σ interval), and the blue dashed lines indicate m ± 1σ. The red dashed line is the linear fit to the median and robust mean over the interval [3.9, 5.2] AU (that contains most data points); it corresponds to a duration of 43.2 min at 5.2 AU and a slope of − 7.6 min/AU.

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