PACS colour correction curves for both the 70 and 160 μm filters, extrapolated from the colour correction values at T = 10, 15, 20 and 30 K described in the PICC-ME-TN-038 PACS report. The green and black crosses show the colour corrections applied for the starless and protostellar clumps flux distributions, respectively. Their values are 1.307 and 0.946 for starless and 1.223 and 0.955 for protostellar clumps at 70 and 160 μm respectively, corresponding to a temperature of T = 15.52 K and 17.17 K for starless and protostellar clumps, respectively.