The X-ray spectrum of the black hole candidate GX339-4 in a low state
Open Access
- 1 September 2003
- journal article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 408 (1) , 347-352
- https://doi.org/10.1051/0004-6361:20030923
Abstract
We report on four observations of the black hole candidate GX 339-4 collected in the spectral range 0.4-140 keV with the BeppoSAX satellite during 1997. All our spectra are typical of a black hole candidate in its low-hard state, i.e. are dominated by the hard tail of the emission from the corona. Although the direct emission from the accretion disk in the soft X-ray range is weak, spectra are well described only with models that take into consideration the Compton reflection of hard X-rays from the corona onto the surface of an accretion disk of non negligible extent.Keywords
All Related Versions
This publication has 26 references indexed in Scilit:
- Radio/X-ray correlation in the low/hard state of GX 339–4Astronomy & Astrophysics, 2003
- Correlated X‐Ray Spectral and Timing Behavior of the Black Hole Candidate XTE J1550−564: A New Interpretation of Black Hole StatesThe Astrophysical Journal Supplement Series, 2001
- Spectral Evolution of PKS 2155−304 Observed withBeppoSAXduring an Active Gamma‐Ray PhaseThe Astrophysical Journal, 1999
- A State Transition of GX 339−4 Observed with the [ITAL]Rossi X-Ray Timing Explorer[/ITAL]The Astrophysical Journal, 1999
- BeppoSAX observations of the exotic black hole candidate GX 339-4Nuclear Physics B - Proceedings Supplements, 1998
- BeppoSAX, the wide band mission for X-ray astronomyAstronomy and Astrophysics Supplement Series, 1997
- The high energy instrument PDS on-board the BeppoSAX X–ray astronomy satelliteAstronomy and Astrophysics Supplement Series, 1997
- Sigma hard X-ray observations of GX 339-4 during the hard state and a transition to the soft stateThe Astrophysical Journal, 1993
- The high-energy X-ray spectrum of black hole candidate GX 339-4 during a transitionThe Astrophysical Journal, 1987
- Solar-system abundances of the elementsGeochimica et Cosmochimica Acta, 1982