SED-fitting results for NGC 4945. The best-fit solution (red solid line) is obtained when two dust components with temperatures of 28 K (blue MBB) and 50 K (green MBB) are needed, assuming a source size of 20″ × 10″. The total dust mass obtained from the fit is ≲10⁷ M_⊙. The SPIRE and PACS data are shown using red and violet squares, respectively. Additional data used in the fit are shown in filled black squares. In particular, at shorter frequencies the SMA (Chou et al. 2007) and LABOCA (Weiß et al. 2008) data were added (see text for details) obtaining a β parameter of 2.0. At higher frequencies the MSX data point is considered in the fit while two IRAC data points are only shown for completeness (in gray).