Polarisation intensity, $P=\sqrt{Q^2+U^2}$, of the synchrotron zeroth moment (dash-dotted blue line) and the first moment (green) for two pivot values of β_s = −3.0 (dash-dotted green line) and −2.97 (dashed green lines) at a pivot frequency, ν_s = 22.8 GHz. Emissions from dust, CMB, and AME (0.5% polarisation fraction) are presented by black, cyan, and magenta dash-dotted lines, respectively. The grey areas represent the frequency bands of QUIJOTE MFI bands, WMAP K and Ka-band, and Planck LFI 30 GHz.