For each pair of plots, left: spectra of radio emission for pulsars detected in the census. Smaller black points with error bars mark literature flux densities, larger green dots show LOFAR LBA census measurements at various frequencies (with horizontal errorbars indicating the frequency span of a given census measurement), brown diamonds show flux densities from HBA census (B16), and arrows show upper limits. For LBA census measurements, thin grey errorbars show ±50% flux uncertainty and thicker green ones show uncertainty due to limited S/N. See text for both census and literature flux density errors and upper limit discussion. In the case of a multiple-PL fit, the uncertainty on the break frequency is marked with a broken black line. Right: flux-calibrated average profiles for LOFAR LBA census observations. Multiple profiles per band are shown with a constant flux offset between separate subbands. The choice of the number of subbands was defined by the peak S/N of the average profile, the presence of profile evolution within the observing band and the number of previously published flux density values.