CH₃OH(2_kk−1_kk) spectrum (brightness temperature, T_B, scale) extracted at the continuum peak position of SVS13-A (Table 2). The spectra were multiplied by a factor 37, assuming an emitting region of 0″.4 (see Sect. 5.1). The transitions producing the emission methanol profiles are labelled, and the corresponding frequencies are marked by vertical black segments (see Table 1). The CH₃OH spectra are centred at the frequency of the 2_0,2−1_0,1 A transition: 96741.38 MHz. The vertical black line at +8.5 km s⁻¹ shows the systemic velocity (Podio et al. 2021).