Abstract
FLUCTUATIONS in the intensity between 2 and 30 keV of the strongest, steady celestial X-ray source, Sco X-1, on time scales of seconds and tens of seconds, fall within the sensitivity of present sounding rocket experiments stabilized on the source and using proportional detectors with areas of the order of 100 cm2. Kestenbaum et al.1 have observed a transient fluctuation in the X-ray intensity with a period of 20 s and an amplitude of about 0.8%. The oscillations were correlated with optical fluctuations of about 0.6% amplitude for the same period.
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References
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GRIFFITHS, R., COOKE, B. Fluctuations in the X-ray Intensity of Sco X-1. Nature Physical Science 236, 104–106 (1972). https://doi.org/10.1038/physci236104a0
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DOI: https://doi.org/10.1038/physci236104a0
