Abstract
DURING a search for celestial sources of X-ray emission, several opportunities arose to detect X-rays associated with Jupiter's radiation belts. The observations presented here were obtained from three successive scans of Jupiter made by a proportional counter flown on an Aerobee rocket launched from Wallops Island, Virginia. Although significant X-ray fluxes (which were time-dependent and apparently associated with or led to horizon effects) were observed, no X-ray flux from Jupiter was detected. The observations given in Fig. 1 below led to a conservative upper limit of 2.4 × 10−8 ergs/cm2 sec for the flux of 4–8 keV (3–1.5 Å) photons from Jupiter between 0603 U.T. and 0605 U.T. on September 30, 1962.
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References
Fisher, P. C., and Meyerott, A. J., Astrophys. J., 139, 123; 140, 821 (1964).
Fisher, P. C., Meyerott, A. J., Grench, H. A., Nobles, R. A., and Reagan, J. B., Inst. Rad. Eng. Trans. Nuclear Sci., NS–10, 211 (1963).
Warwick, J. (private communication).
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FISHER, P., CLARK, D., MEYEROTT, A. et al. Upper Limit to Jupiter's X-ray Flux on September 30, 1962. Nature 204, 982–983 (1964). https://doi.org/10.1038/204982a0
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DOI: https://doi.org/10.1038/204982a0
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