¹³CO 6–5 maps of IRAS 4A (0, 0) and IRAS 4B (22.5, −22.8). Left: integrated intensity map of IRAS 4A and 4B in a 80″  ×  80″ area. The white elliptical biconical shape delineate the outflow cones as discussed in Sect. 6. Right: blue and redshifted outflows seen in the ¹³CO 6–5 line profiles overplotted on a spectral map of the same region. Individual spectra are shown on a T_MB scale from –1 K to 4 K and the velocity scale runs from –5 km s^-1 to 15 km s^-1. The contour levels for both figures are 3σ, 6σ, 9σ, ... where σ = 0.6 K.