MATISSE squared visibilities, correlated fluxes, and closure phases in the L band. First row: data from epoch 4 (UTs) and the bottom row data from epoch 5 (ATs). The visibilities and correlated fluxes are color-coded with respect to the baselines, as shown in the legends, while closure phases have a different color scheme (per baseline triangle). The apparent flaring in the data below 3.2 µm and beyond 3.9 µm is a known instrumental artifact at the edges of the atmospheric transmission windows.