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Science 10 June 1966:
Vol. 152. no. 3728, pp. 1499 - 1504
DOI: 10.1126/science.152.3728.1499
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Articles

X-Ray Spectra from Three Cosmic Sources

R. J. Grader 1, R. W. Hill 1, F. D. Seward 1, and A. Toor 1

1 Lawrence Radiation Laboratory, University of California, Livermore

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 I 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-J decreased at low photon energies. The differences in spectra might source mechanisms.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Relativistic Astrophysics.
S. P. Maran and A. G. W. Cameron (1967)
Science 157, 1517-1524
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Spectrum and Distance of Source Sco XR-1.
H. Friedman, E. T. Byram, and T. A. Chubb (1966)
Science 153, 1527-1528
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)