NOEMA/SOLIS images of the continuum and CH₂DCN line emission towards SVS13-A. Left panel: dust continuum emission at about 90 GHz (see Sect. 2). The intensity scale is in Jy beam⁻¹. The first contour and the steps are 5σ (1σ = 7 µJybeam⁻¹) and 20σ, respectively. The filled ellipse in the bottom left corner shows the synthesised beam (HPBW): 1″.8 × 1″.2 (PA = 39°). The three objects in the primary beam, SVS13-A, SVS13-B, and VLA3, are labelled. The cyan dashed circles indicate the minimum (9″) and maximum (27″) IRAM-30m HPBW in the 1 and 3 mm bands, respectively (see Sect. 3). Right panels: zoomed-in images of the central region where the two CH₂DCN lines emit. The intensity scale is Jy beam⁻¹ kms⁻¹. The first contours and steps are 3σ (2.1 mJy beam⁻¹ km s⁻¹) and 1σ, respectively. The synthesised beam is the same as for the continuum map. The two components of the SVS13-A binary system, VLA4A and VLA4B, are 0″.3 apart (Anglada et al. 2000) and are labelled. The cyan dashed circle shows the 9″ IRAM-30 m HPBW.