The X-ray and extreme-ultraviolet flux evolution of SS Cygni throughout outburst

  title={The X-ray and extreme-ultraviolet flux evolution of SS Cygni throughout outburst},
  author={Peter J. Wheatley and Christopher W. Mauche and Janet Akyuz Mattei},
  journal={Monthly Notices of the Royal Astronomical Society},
We present the most complete multiwavelength coverage of any dwarf nova outburst: simultaneous optical, Extreme Ultraviolet Explorer and Rossi X-ray Timing Explorer observations of SS Cygni throughout a narrow asymmetric outburst. Our data show that the high-energy outburst begins in the X-ray waveband 0.9–1.4 d after the beginning of the optical rise and 0.6 d before the extreme-ultraviolet rise. The X-ray flux drops suddenly, immediately before the extreme-ultraviolet flux rise, supporting… 
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