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Fig. 5.
Noise map of the LOFAR 150 MHz mosaic of the Boötes field after primary beam correction. The color scale varies from 0.5σc to 9σc, where σc = 55 μJy beam−1 is the rms noise in the central region. Contours are plotted at 70 μJy beam−1 and 110 μJy beam−1.
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