LoLSS flux density versus the expected flux density at 54 MHz from the linear extrapolation of the spectral energy distribution (SED) using NVSS and LoTSS (top panel) or from a quadratic polynomial SED estimated using NVSS, LoTSS, and 8C (bottom panel). A ratio of 1, the blue dotted lines, means a perfect match between the prediction and the flux density measured in LoLSS. Red crosses are binned medians (five bins for the top panel, one for the bottom) with ±1 median absolute deviation shown as an extension in the y-direction and the bin size as an extension in the x-direction.