Observation of GX 339-4 hard state outbursts in 1991 and 1992

Details Observation of GX 339-4 hard state outbursts in 1991 and 1992 Observation of GX 339-4 hard state outbursts in 1991 and 1992

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425l..17h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 425, no. 1, p. L17-L20

Astronomy and Astrophysics

Astronomy

22

Binary Stars, Black Holes (Astronomy), Gamma Ray Astronomy, Spaceborne Astronomy, X Ray Astronomy, X Ray Spectra, Gamma Ray Observatory, Occultation, Photon Density, Spectral Emission, Spectrum Analysis

Scientific paper

Two hard state (X-ray low state) outbursts in the GX 339-4 system in 1991 June-October and 1992 September-1993 January were detected and monitored by the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (CGRO). The outbursts were remarkably similar in both temporal and spectral aspects. The spectrum in the 20-300 keV band evolves from a hard, Comptonized shape to a steeper (alpha approximately equals -3) power law during each outburst.

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