Fig. 3.
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Power spectra of the foregrounds and 21 cm signal in the masked and beam-convolved sky (in the ℓ range of 0–300) in the BINGO frequency band 15 (∼1125 MHz; see Table 1). Before computing the power spectrum, all maps were convolved with a 40 arcmin beam, and masked according to the BINGO sky coverage. We also apply a galactic mask described in Sect. 2.3.
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