Panel a) distribution of effective (black body) temperature kT for disk novae (shaded/upper plot), bulge novae (black/middle plot), and the total sample (grey/lower plot), respectively. The upper two plots show frequencies and the lower one shows densities with an overlaid smooth density curve. b) Empirical cumulative density distribution functions of the inclination-corrected M 31-centric distances for novae with high mass (blue) and low mass (red) WDs. Distances are given in kpc, assuming a distance to M 31 of 780 kpc and are not corrected for projection effects.