Sidelobes of the BINGO central beam present a Moirré effect due the two-mirror configuration of the instrument (panel a). We found that this effect is attenuated when integrating the beam. Panels b and c show integrated beams over widths of 10 MHz and 20 MHz respectively, computed in the range 1105–1115 MHz and 1100–1120 MHz, with displacements of 1 MHz and normalized by the number of steps. The attenuation effect is clearer in panel d, portraying a 1D cut of the results from panels a–c.