L_C II/L_{8 − 1000} ratio vs. L_{8 − 1000}. The sources are plotted as a red circle for the QSO and a green star for the DSFG. The clumps C1, C2, C3, and C4 are plotted as a cyan triangle-up, a yellow triangle-down, a blue triangle-left, and a pink triangle-right, respectively. The L_{8 − 1000} are obtained by integrating from 8−1000 μm the SEDs constructed with T = 45 K and β = 1.6. For the clumps, only upper limits of the L_{8 − 1000} and lower limits for the L_C II/L_{8 − 1000} ratio are shown. The bars represent the quadratic sum of the uncertainties associated with the aperture measurement of the [CII] and FIR emission and the values for L_{8 − 1000} and L_C II/L_{8 − 1000} obtained using the L_{8 − 1000} when the SEDs are constructed with T = 40 K and T = 50 K.