Fig. 1. North-South cuts through the ISO maps showing that the cold dust emission is extended. The pixel size is 1.5'

Fig. 2. Spectral Energy Distribution: The lines represent modified blackbodies with emissivity proportional to λ^-2. While the IRAS and ISO fluxes are obtained from the full extended 3' × 2' emission, the mm flux is obtained only within an 18 arcsec beam and probably represents an underestimate for the total galaxy. The suggested total mm flux is indicated by the arrow and the question mark