Spectral energy distribution fitting for the host galaxy Region 1 (upper panels) and for the companion galaxy Region 2 (lower panels). The left and right columns correspond to a single delayed-τ SFH and a delayed-τ plus a starburst SFH, respectively. The red circles represent the NIRCam broad-band fluxes from image fitting, and the red triangles represent the observed Hβ and [O III] λλ4959,5007 line fluxes. The solid black line and the gray shaded region mark the Prospector modelled spectrum and its 1σ error, while the orange squares show the resulting model photometry.