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25 papers
Broad-band X-ray spectral evolution of GX 339-4 during a state transition
M. Del Santo, T. M. Belloni, J. Homan +8
We report on X-ray and soft gamma-ray observations of the black-hole candidate GX 339-4 during its 2007 outburst, performed with the RXTE and INTEGRAL satellites. The hardness-inte…
Chandra detection of XTE J1650-500 in quiescence and the minimum luminosity of black hole X-ray binaries
Elena Gallo, Jeroen Homan, Peter Jonker +1
The Galactic black hole X-ray binary XTE J1650-500 entered a quiescent regime following the decline from the 2001-2002 outburst that led to its discovery. Here we report on the fir…
Multi-wavelength observations of jets at high and low X-ray luminosities
Elena Gallo
I shall briefly review the observational properties of radio-emitting jets from Galactic X-ray binaries in relation with other wavebands: infrared, optical and X-ray. Special atten…
AMUSE-Virgo I. Super-massive black holes in low-mass spheroids
Elena Gallo, Tommaso Treu, Jeremy Jacob +3
We present the first results from the AGN Multiwavelength Survey of Early-type galaxies in the Virgo cluster (AMUSE-Virgo). This large program targets 100 early-type galaxies with…
The spectral energy distribution of quiescent black hole X-ray binaries: new constraints from Spitzer
E. Gallo, S. Migliari, S. Markoff +5
(Abridged) Among the various issues that remain open in the field of accretion onto black hole X-ray binaries (BHBs) is the way the gas accretes at very low Eddington ratios, in th…
Jets from the faintest black holes
Elena Gallo
The question whether quiescent black hole X-ray binaries are capable of powering relativistic outflows is addressed by means of simultaneous radio/X-ray observations of a nearby sy…