Fig. 4

B2 0120+33. Top-left panel image has been taken at 1.4 GHz with the VLA in B+C configuration, the restoring beam FWHM is 11.2″ × 10.4″. The contours of the radio intensity are overlaid on the optical DSS2 image. The top-right panel shows the overlay of the spectral index image between 324 MHz and 1.4 GHz with the 1.4 GHz contour levels of the VLA C array image. The restoring beam FWHM is 16″ × 14.5″. The sensitivity levels of 324 MHz and 1.4 GHz images are 1.4 mJy/beam and 90 μJy/beam, respectively. Radio contours start from a level of 3σ-rms and scale by . In the bottom panel, we show the integrated spectrum of the source along with the best-fit synchrotron model.
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