Fig. 7
Examples of X-band VLBI maps for sources observed during GC030. Upper panel: six sources suitable for the alignment with Gaia (point-like sources): 0838+235, 0850+284, 0950+326, 1201+454, 1730+604 and 2111+801. Lower panel: six sources not suitable for this alignment (sources with extended VLBI structures): 0818+312, 1028+313, 1126+237, 1128+517, 1742+724 and 2043+749. The first contour level is typically 1% of the peak brightness, with successive contours increasing by a factor of 2. Image parameters are listed in Table 3. The FWHM Gaussian restoring beam applied to the images is shown as an ellipse in the lower left of each panel.
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