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Fig. 3
One of the six maps of residuals obtained from the differences of the epochs shown in Fig. 2. This one corresponds to the difference between the 1993 and the 1994 epochs. The rest of residual maps may be seen in Appendix A. Contour levels are −5, −3, 0, 2, 4, 6 times the rms noise, which amounts 28 μJy.
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