Integrated-intensity maps for SiO and CO (PRODIGE) towards IRAS 4B1 and IRAS 4B2 (green stars) and for CH₃OH and C³⁴S (ALPPS, next page) zoomed in (cf. the dashed black rectangle in the CO panels) on IRAS4B1. The intensities were integrated over intervals of 10 kms⁻¹ (SiO and CO) and 2 kms⁻¹ (CH₃OH and C³⁴S). Contour levels are at −10σ, 10σ and then increase by a factor of 2, where σ = 0.24K kms⁻¹ (SiO), 0.27K kms⁻¹ (CO), and 0.34K kms⁻¹ (CH₃OH and C³⁴S). The black crosses mark H₂ knots (Choi & Lee 2011). The HPBWs are shown in the bottom left corners.