Physics
Scientific paper
Jun 1966
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966sci...152.1499g&link_type=abstract
Science, Volume 152, Issue 3728, pp. 1499-1504
Physics
63
Scientific paper
Three cosmic x-ray sources have been observed from a water-launched rocket carrying two x-ray detectors to an altitude of 200 kilometers. The x-ray spectra, measured in the photon energy range between 1 and 40 kiloelectron volts, are all different. The sources in order of hardness of spectra are Cyg XR-1, Tau XR-1, and Sco XR-1. The intensity of Sco XR-1 decreased at low photon energies. The differences in spectra might be interpreted as evidence of different source mechanisms.
Grader R. J.
Hill R. W.
Seward Frederick D.
Toor A.
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