Optical and EUV Light Curves of Dwarf Nova Outbursts
  We combine AAVSO and VSS/RASNZ optical and Extreme Ultraviolet Explorer EUV light curves of dwarf novae in outburst to place constraints on the nature of dwarf nova outbursts. From the observed optical-EUV time delays of 0.75-1.5 days, we show that the propagation velocity of the dwarf nova instability heating wave is ~ 3 km/s. 
Christopher W. Mauche (Lawrence Livermore Nat'l Lab.), Janet A. Mattei   (AAVSO), and Frank M. Bateson (VSS/RASNZ)