Open Access

Fig. 5.

image

Timing residuals and excess electron column density as a function of orbital phase, around superior conjunction. All data points in this figure correspond to 1.4 GHz observations; S/Ns larger than 19 are close to the median value. Residuals and electron column densities from a given observation are shown with the same combination of symbols and colors. The phase of superior conjunction is shown as a dashed blue line.

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