Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..563g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 563-570.
Astronomy and Astrophysics
Astronomy
20
Ariel 5 Satellite, Spaceborne Astronomy, X Ray Astronomy, X Ray Sources, X Ray Spectra, Bremsstrahlung, Energy Spectra, Statistical Analysis, X Ray Spectroscopy, X Ray Stars, X Ray Telescopes
Scientific paper
Results are reported for observations of Sco X-1 and the similar sources 4U 1702-36 (GX 349+2, Sco X-2), 4U 1813-14 (GX 17+2), and 4U 1758-25 (GX 5-1) by several of the X-ray telescopes aboard the Ariel 5 satellite over the energy range from 2 to approximately 100 keV. The results confirm the existence of a high-energy tail in the spectrum of Sco X-1, demonstrate that 4U 1702-36 has a similar spectrum, and provide evidence for a variation of the 26-56-keV flux from 4U 1702-36 by more than a factor of four with no related change in the 2.9-7.6-keV flux. The high-energy emission from Sco X-1 is found to be one to two orders of magnitude above the extrapolated low-energy emission. Observed X-ray, radio, and optical properties of these four sources, as well as two additional Sco-like sources, are summarized.
Bell Burnell Jocelyn S.
Carpenter G. F.
Coe Malcolm J.
Greenhill John G.
Strong Keith Temple
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