Spatial distribution (contours and colour) of the SVS13-A region obtained using the NS(9/2–7/2) Ω = 1/2 emission. The whole velocity emitting region has been used (from 0 km s⁻¹ to +15 km s⁻¹. The line profile consists of three hyperfine components, blended at the present spectral resolution (see Fig. 5 and Table 1). Angular offset are relative to the phase centre (see Sect. 3). The first contour and steps are 5σ (50 mJy km s⁻¹) and 10σ, respectively. The filled ellipse shows the synthesized beam (HPBW): 0.′′65 × 0.′′58 (PA = –46°). The black crosses indicate the positions of the VLA4A and VLA4B sources as imaged using the VLA array by Tobin et al. (2018).