Fig. 1.
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Left panel: Very Long Baseline Array image of the PRS at 5 GHz. The FWHM (3.7 × 1.7 mas) is shown in the lower-left corner. Right panel: Radio spectral shapes of the four PRSs discovered so far. This image was built with VLA data (except for our VLBA 5 GHz measurement). The blue shaded area represents the region below the 3-σ VLA sensitivity in the range 1–50 GHz.
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