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Intermittent accreting millisecond pulsars: light houses with broken lamps?
D. Altamirano, P. Casella
Intermittent accreting millisecond X-ray pulsars are an exciting new type of sources. Their pulsations appear and disappear either on timescales of hundreds of seconds or on timesc…
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…
A parsec scale X-ray extended structure from the X-ray binary Circinus X-1
P. Soleri, S. Heinz, R. Fender +8
We present the results of the analysis of two Chandra observations of Circinus X-1 performed in 2007, for a total exposure time of ~50 ks. The source was observed with the High Res…
A New Class of Radio Pulsars - Back in 1982
M. Ali Alpar
Basic ideas about the torques on the neutron star and the existence of an equilibrium rotation period followed from the recognition that most X-ray binaries contain accretion power…
Weighing the black holes in ultraluminous X-ray sources through timing
P. Casella, G. Ponti, A. Patruno +3
We describe a new method to estimate the mass of black holes in Ultraluminous X-ray Sources (ULXs). The method is based on the recently discovered ``variability plane'', populated…
Multiwavelength observations of the black hole candidate Swift J1753.5-0127
Paolo Soleri, Diego Altamirano, Rob Fender +8
We present preliminary results from the analysis of simultaneous multiwavelength observations of the black hole candidate Swift J1753.5-0127. The source is still continuing its out…