Flux densities for the NaCl J = 24−23 lines in the ground-vibrational state v = 0 at 312 GHz (upper panel) and in the first vibrational state v = 1 at 309 GHz (lower panel). Flux densities are extracted in the north clump (NB, full line) at (07h22m58.326s, −25°46′02.̋9) for an aperture of (0.̋394 × 0.̋373), in the south clump (SB, dotted line) at (07h22m58.332s, −25°46′03.̋118) for an aperture of (0.̋36 × 0.̋36), and in case of the 312 GHz line in the south-west clump (SW, dashed line) at (07h22m58.273s, −25°46′04.̋028) for an aperture of (0.̋57 × 0.̋73). The LSR velocity of 22 km s^-1 is indicated by the vertical dotted line.