Notes. Dust temperature (T_D) and masses (M_D), and their uncertainties, are derived from SED fitting (see text for details). We also report the mass of hydrogen in the atomic phase, as derived from H i maps of Braun et al. (2009) (both corrected and non-corrected for self-opacity), and the mass of gas in the molecular phase derived by CO data (Nieten et al. 2006). Last two columns give the total gas-to-dust ratios within the given annulus. Results for the largest annulus and for the whole galaxy are limited by the size of the CO map (see text for more details): the value indicated with ^a assumes a mass of 5% of total, within that annulus, and the value of the gas-to-dust in the outermost annulus (^b) was computed assuming a negligible contribution from the molecular fraction, and it is hence to be interpreted as a lower limit. Values in the columns labelled with ^∗ are calculated using the self-opacity corrected maps. “a” and “b” are the major and minor axis length, respectively, of the ellipses, given in kpc (first aperture is circular).