The Off State of GX 339 – 4 3

@inproceedings{Kong2000TheOS,
  title={The Off State of GX 339 – 4 3},
  author={Albert Kwok-Hing Kong and Erik Kuulkers and Philip A. Charles and Lee Homer},
  year={2000}
}
We report BeppoSAX and optical observations of the black hole candidate GX 339– 4 during its X-ray 'off' state in 1999. The broad-band (0.8–50 keV) X-ray emission can be fitted by a single power law with spectral index, α ∼ 1.6. The observed lu-minosity is 6.6 × 10 33 erg s −1 in the 0.5–10 keV band, which is at the higher end of the flux distribution of black hole soft X-ray transients in quiescence, comparable to that seen in GS 2023+338 and 4U 1630–47. An optical observation just before the… CONTINUE READING
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