Stéphane Corbel

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We have observed the black hole candidate X-ray binary GX 339-4 at radio wavelengths before, during and after the 1998 high/soft X-ray state transition. We find that the radio emission from the system is strongly correlated with the hard X-ray emission and is reduced by a factor ≥ 25 during the high/soft state compared to the more usual low/hard state. At(More)
The Galactic black hole candidate X-ray binary GX 339−4 spends most of its time in the low/hard state, making it an ideal candidate for modeling the assumedly low accretion phase. The radio emission correlates very tightly with the X-rays over more than two orders of magnitude in X-ray flux density, suggesting that the jet plasma also plays a role at the(More)
Context. The idea of a unified description of supermassive and stellar black holes has been supported by the extension of the empirical radio/X-ray correlation from X-ray binaries to active galactic nuclei through the inclusion of a mass term. This has lead to the so-called fundamental plane of black hole activity in the black hole mass, radio and X-ray(More)
We report the results of 3 observations of GRS 1915+105 during which the source is found to show the X-ray dips/spike sequences (cycles). These observations were performed simultaneously with INTEGRAL, RXTE, the Ryle and Nançay radio telescopes. They show the so-called ν, λ and β classes of variability during which a high level of correlated X-ray and radio(More)
The black hole candidate (BHC) X-ray transient 4U 1630–47 continuously produced strong X-ray emission for over 2 years during its 2002–2004 outburst, which is one of the brightest and longest outbursts ever seen from this source. We use over 300 observations made with the Rossi X-ray Timing Explorer (RXTE) to study the source throughout the outburst along(More)
We report on X-ray observations made with the Rossi X-ray Timing Explorer of the black hole candidate (BHC) transient XTE J1650–500 at the end of its first, and currently only, outburst. By monitoring the source at low luminosities over several months, we found 6 bright ∼100 s X-ray flares and long time scale oscillations of the X-ray flux. The oscillations(More)
We present new millimeter and infrared spectroscopic observations towards the radio nebula G10.0−0.3, which is powered by the wind of the Luminous Blue Variable star LBV 1806−20 also closely associated with the soft gamma-ray repeater SGR 1806−20, and believed to be located in the giant Galactic H ii complex W31. Based on observations of CO emission lines(More)
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