Top: Calibrated MATISSE spectrum of the L-band data with, from left to right, the pseudo-continuum (P-Cont.), SiO_a: a mixture of the SiO (v = 2 → 0) and SiO (v = 3 → 1) rotational-vibrational band-heads, SiO_b: SiO (v = 3 → 1), SiO_c: a mixture of SiO (v = 4 → 2) and SiO (v = 3 → 1), SiO_d: SiO (v = 4 → 2), and SiO_e: a mixture of SiO (v = 5 → 3) and SiO (v = 4 → 2). Bottom: Calibrated MATISSE spectrum of the N-band data with the main chemical elements contributing to the emission on top of the continuum estimated by Sacuto et al. (2008) with Dust₁ and Dust₂ corresponding to both a mixture of silicates and alumina. For each band, the red section represents the part of the spectrum used to make the various image reconstructions. For the L band the vertical dashed lines represent the central part of the respective spectral absorption signature.