SIMBAD references

2006MNRAS.367.1113B - Mon. Not. R. Astron. Soc., 367, 1113-1120 (2006/April-2)

INTEGRAL/RXTE high-energy observation of a state transition of GX 339-4.

BELLONI T., PAROLIN I., DEL SANTO M., HOMAN J., CASELLA P., FENDER R.P., LEWIN W.H.G., MENDEZ M., MILLER J.M. and VAN DER KLIS M.

Abstract (from CDS):

On 2004 August 15, we observed a fast (shorter than 10 h) state transition in the bright black hole transient GX 339-4 simultaneously with Rossi X-Ray Timing Explorer (RXTE) and INTEGRAL. This transition was evident both in timing and spectral properties. Combining the data from the Proportional Counter Array (PCA), the High-Energy X-ray Timing Experiment (HEXTE) and the Imager on Board the INTEGRAL Satellite (IBIS), we obtained good quality broad-band (3-200 keV) energy spectra before and after the transition. These spectra indicate that the hard component steepened. Also, the high-energy cut-off that was present at ∼70 keV before the transition was not detected after the transition. This is the first time that an accurate determination of the broad-band spectrum across such a transition has been measured on a short time-scale. It shows that, although some spectral parameters do not change abruptly through the transition, the high-energy cut-off increases/disappears rather fast. These results constitute a benchmark on which to test theoretical models for the production of the hard component in these systems.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): accretion, accretion discs - black hole physics - X-rays: binaries

Simbad objects: 8

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2021.06.15-21:29:16

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