SS Cygni as a hard X-ray source identified with the scanning modulation collimator on HEAO 1

@article{Fabbiano1978SSCA,
  title={SS Cygni as a hard X-ray source identified with the scanning modulation collimator on HEAO 1},
  author={Guiseppina Fabbiano and Herbert Gursky and D. Schwartz and Joseph Schwartz and H. V. Bradt and R. E. DOXSEY},
  journal={Nature},
  year={1978},
  volume={275},
  pages={721-723}
}
X-RAY emission from the dwarf nova SS Cygni was first detected at soft (∼ ¼ keV) X-ray wavelengths when the source was in an optical high state1–3. More recently, ANS satellite observers4 have reported the detection of soft X-ray emission when SS Cygni was in an optical low state. These latter observations show the flux of the soft X-ray source to be about an order of magnitude less than the values when in the optical high state. The soft X-ray positional uncertainty is ∼ 0.2deg2. The… CONTINUE READING