CO₂ν₃ and ν₂ bands in IRAS 07251−0248 observed with JWST NIRSpec, and model fit. The upper panel a shows the observed spectrum around 4.25 μm (flux densities in mJy), with the orange line indicating the adopted continuum level (i.e., the baseline) and the light-blue curve showing the contribution to the continuum by the W_C. The lower panel shows the continuum normalized spectrum, with the blue line showing the model result for the H_C and the dashed line indicating the covering factor of the hot component (f_hot). We have also included the required contribution to the absorption by CO₂ ice (exp{−τ_ice} in magenta); red is the resulting spectrum. The insert shows the Q branch of the CO₂ν₂ band at ≈15 μm, with the blue line also indicating the model result for the H_C.