Fig. 2.
Self-calibrated images of IIIZw 2. The images were obtained at (a) 4.148 GHz, (b) 7.652 GHz, (c) 15.352 GHz and (d) 23.88 GHz. The rms noise level from the lower to the higher frequency is 0.1, 0.1, 0.1 and 0.2 mJy beam−1. The interferometric beam (ellipse) is displayed on the bottom-left corner of each image. Contours represent −0.6%, 0.6%, 1.2%, 2.4%, 4.8%, 9.6%, 19.2%, 38.4%, and 76.8% of the peak intensity at each image.
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