Contents
ß M83 (grand-design spiral with nuclear starburst)
                  diffuse emission
                  discrete source populations
                  multi-wavelength comparisons
ß M81 (grand-design spiral with active nucleus)
                  discrete source populations
                  origin of the X-ray emission lines
                  comparison between Milky Way, M83, M81
For more details, see recent papers by our UCL group
(Soria et al 2003, Page et al 2003, 2004)