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Science 1 April 1966:
Vol. 152. no. 3718, pp. 66 - 71
DOI: 10.1126/science.152.3718.66
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Articles

Cosmic X-ray Sources, Galactic and Extragalactic

E. T. Byram 1, T. A. Chubb 1, and H. Friedman 1

1 E. O. Hulburt Center for Space Research, U.S. Naval Research Laboratory, Washington, D.C. 20390

Instruments carried aboard an Aerobee rocket in April 1965 provided evidence for x-ray emission from the directions of the radio galaxies Cygnus A and M-87 and from the galactic supernova remnant Cassiopeia A. A survey of the Cygnus region revealed a marked decrease in the flux of x-rays from Cygnus XR-1, which was identified in June 1964 as the second brightest object in the first Naval Research Laboratory list of x-ray sources. The detection sensitivity was improved over previous surveys and several new sources were detected at lower flux levels.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
X-rays from Source 3C 273.
E. Argyle, H. Friedman, E. T. Byram, and T. A. Chubb (1968)
Science 159, 747-748
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X-rays from Sources 3C 273 and M 87.
H. Friedman and E. T. Byram (1967)
Science 158, 257-259
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Relativistic Astrophysics.
S. P. Maran and A. G. W. Cameron (1967)
Science 157, 1517-1524
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