Fig. 8.
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A2142 spectral index maps between 50 and 143 MHz at various resolutions before (left panels) and after (right panels) the subtraction of the discrete sources. Top: maps at 24″ × 24″ resolution. Middle: maps at 75″ × 75″ resolution. Bottom: maps at 136″ × 136″ resolution. In all the panels, the corresponding contours at 143 MHz are drawn in black.
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