Observations of 12-200 keV X-rays from GX 339-4

Details Observations of 12-200 keV X-rays from GX 339-4 Observations of 12-200 keV X-rays from GX 339-4

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..727n&link_type=abstract

Astrophysical Journal, Part 1, vol. 262, Nov. 15, 1982, p. 727-731.

Astronomy and Astrophysics

Astronomy

19

Astronomical Spectroscopy, Companion Stars, X Ray Sources, Black Holes (Astronomy), Cygnus Constellation, Photons, Spectral Energy Distribution

Scientific paper

X-ray spectra of GX 339-4 measured on three occasions in 1977 and 1978 are presented. These are the first reported measurements above 10 keV. The spectra can be described as the superposition of a soft component, which is dominant below about 20 keV, and a hard component at higher energy. Simultaneous measurements at lower energy show that the soft component vanished during the observation in early 1978. The behavior of these two components is similar to that of the spectrum of Cygnus X-1; this reinforces the previously noted resemblance in rapid X-ray variability.

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