Integrated intensity map of the different tracers used to observe the NGC1333 region. Top left: Large scale traced with ¹³CO (1–0). The footprint of the C¹⁸O (3–2) map is marked by the dashed box. Top right: Intermediate scale traced with C¹⁸O (3–2). The footprint of the interferometric data is marked by the dashed box. Bottom left and right: Highest angular resolution maps of H¹³CO⁺ and HNC (1–0), respectively. The beam size and scale bar are shown in the top right and bottom right corners, respectively.