169 citations · 750 across the 12 of their papers we have counts for
5 papers · 1 filter
A variable Quasi-Periodic Ocillation in M82 X-1. Timing and spectral analysis of XMM-Newton and RossiXTE observations
P. Mucciarelli, P. Casella, T. Belloni +2
We report results from a spectral and timing analysis of M82 X-1, one of the brightest known ultraluminous X-ray sources. Data from a new 105 ks {\it XMM-Newton} observation of M82…
A continuous Flaring- to Normal-branch transition in Sco X-1
Piergiorgio Casella, Tomaso Belloni, Luigi Stella
We report the first resolved rapid transition from a Flaring Branch Oscillation to a Normal Branch Oscillation in the RXTE data of the Z source Sco X-1. The transition took place o…
Discovery of Rapid X-ray Oscillations in the Tail of the SGR 1806-20 Hyperflare
GianLuca Israel, Tomaso Belloni, Luigi Stella +7
We have discovered rapid Quasi Periodic Oscillations (QPOs) in RXTE/PCA measurements of the pulsating tail of the 27th December 2004 giant flare of SGR 1806-20. QPOs at about 92.5H…
The evolution of the timing properties of the black-hole transient GX 339-4 during its 2002/2003 outburst
T. Belloni, J. Homan, P. Casella +5
We present the results of the timing and color analysis of more than two hundred RXTE/PCA observations of the bright black-hole transient GX 339-4 obtained during its 2002/2003 out…
The ABC of low-frequency quasi-periodic oscillations in Black-Hole Candidates: analogies with Z-sources
P. Casella, T. Belloni, L. Stella
Three main types of low-frequency quasi-periodic oscillations (LFQPOs) have been observed in Black Hole Candidates. We re-analyzed RXTE data of the bright systems XTE J1859+226, XT…