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

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

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...

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Veröffentlicht in:The Astrophysical journal 1994-04, Vol.425 (1), p.L17
Hauptverfasser: Harmon, B. A., Wilson, C. A., Paciesas, W. S., Pendleton, G. N., Briggs, M. S., Rubin, B. C., Finger, M. H., Fishman, G. J., Brock, M. N., Wilson, R. B.
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Sprache:eng
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Astronomy
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Zusammenfassung: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.
ISSN:0004-637X
1538-4357
DOI:10.1086/187300