GRAVITY data for WR 98, a WN8/WC7 + O8-9 spectroscopic binary, zoomed in at 2.10–2.22 μm along with the best-fit model shown in red. The top left panel shows the u-v coverage for the observation. The remaining panels, from left to right, show NFLUX, T3PHI, DPHI and |V| respectively, color-coded according to baselines. The data are zoomed in to a wavelength range of around 2.10–2.22 μm, with three prominent emission lines present at 2.11, 2.16 and 2.19 μm. The DPHI data (along with some of |V| data) show slight but clear features corresponding to the spectral lines. The best-fit model for such a system is a very close binary consisting of the line-emitting WR and a flat-spectrum companion, along with a fully resolved component.