Profiles of surface brightness (in mJy/beam) and spectral index across the two filamentary features, F5 and F6, observed in the inner region of Nest200047. Images at 700 MHz and 1518 MHz with 6 arcsec resolution were used for the measurements. The regions used are shown in the left panel and have a size equal to the beam size. Systematic uncertainties in the flux-scale were not included in the error bars as they do not affect the measured trend.