EE pseudo-spectrum standard deviation for each instrumental systematic correction at 30 GHz shown (thin colored lines). For comparison, the thick black line shows the spectrum for the full coadded frequency map; the thick red line shows the standard deviation of the same (i.e., the full systematic uncertainty); the gray line shows white noise; and the dashed black line shows the best-fit Planck 2018 ΛCDM power spectrum convolved with the instrument beam. All spectra have been derived outside the CMB confidence mask (Andersen et al. 2023) using the HEALPix anafast utility, correcting only for sky fraction and not for mask mode coupling. Reproduced from Basyrov et al. (2023).