Continuum and line fit of BiRD. The NIRCam/WFSS spectrum is shown in purple with the corresponding errors (shaded area). We modeled both the He I (pink) and the Paγ (violet) emission with a narrow and a broad Gaussian component. An absorption term was applied to both continuum emission and broad He I line to account for the feature at 3.60 μm. We show the fit residuals in the bottom panel (lilac).