Notes. The second, third and fourth columns contain the horizontal scalelength h_R, the vertical scaleheight h_z, and the face-on optical depth of the dust as derived from radiative transfer fits to V-band images (the scalelength and scaleheights have been rescaled to the distances adopted within HEROES). The fifth column is the optically determined dust mass calculated from these values using Eq. (8). The sixth column contains the reference of the radiative transfer fit: X97 (Xilouris et al. 1997), X99 (Xilouris et al. 1999) or B07 (Bianchi 2007). Dust temperature and dust mass as derived from a modified black-body fit to the Herschel data are reported in the last two columns.