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I show here that the bulk of the dust mass in a galaxy can be equivalentlyestimated from: i) the full spectral energy distribution of dust emission,using the approach of Draine & Lee (2007) that includes a distribution of dustgrains and a range of interstellar radiation field intensities; ii) theemission in the wavelength range 100um <= lambda <= 500um (covered by theHerschel Space Observatory), by fitting to the data a simpler singletemperature modified blackbody. Recent claims on the contrary (Dale et al.2012) should be interpreted as a caveat to use in the simpler fits anabsorption cross section which is consistent both in the normalization and inthe spectral index beta with that of the full dust model. I also show that thedust mass does not depend significantly on the choice of beta, if both the dustmass and the absorption cross section are derived with the same assumption onbeta.

Vindicating single-T modified blackbody fits to Herschel SEDs (Research Note)