Fig. 2.
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Position in the Galaxy and multi-frequency, multi-epoch VLBI images of the target source AT2019wey. The rough position of AT2019wey (J0435+5522) in the Galaxy is shown in panel a (background image credit: NASA/JPL-Caltech/R. Hurt [SSC/Caltech]). From panel b to d3, there are the naturally weighted VLBI images of AT2019wey made with the MODELFIT program in DIFMAP. The synthesised beams (shown in the lower left corners), peak brightnesses, and 1-σ image noise levels are listed in Table 2. The first contours are at ±3σ, and the positive contours increase by a factor of 
for 1.6 GHz, and by a factor of 2 for 4.5 GHz and 6.7 GHz frequencies.
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