Normalized data (crosses) and the best-fit model (red line) of the z = 0.09017 Ne IX line (the FUV predicted line centroid wavelength is marked with a dashed line) for all the instruments and spectral orders employed. The normalization is done by dividing the spectra by the best-fit continuum model. The best-fit model was simultaneously fitted to RGS1 (first and second dispersion orders), RGS2 (second-order), LETG ACIS (first-order), MEG ACIS (first-order) and HRC data, while the RGS2 first-order data was omitted due to a bad column near the centroid wavelength of the line. The missing bins in RGS1 second-order were rejected by the reduction software due to bad response. The spectral data was rebinned for this illustration to improve the S/N-ratio.