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Discovery of the upper kilo-Hz QPO from the X-ray transient Aql X-1
Didier Barret, Martin Boutelier, M. Coleman Miller
We report on a comprehensive analysis of the kilo-Hz (>~600 Hz) quasi-periodic oscillations (kHz QPOs) detected from the neutron star X-ray transient Aquila X-1 (Aql X-1) with the…
Constraining the equation of state of supra-nuclear dense matter from XMM-Newton observations of neutron stars in globular clusters
N. A. Webb, D. Barret
We report on the detailed modelling of the X-ray spectra of three likely neutron stars. The neutron stars, observed with XMM-Newton are found in three quiescent X-ray binaries in t…
Supporting evidence for the signature of the innermost stable circular orbit in Rossi X-ray data from 4U1636-536
Didier Barret, Jean-Francois Olive, M. Coleman Miller
Analysis of archival RXTE data on neutron stars binaries has shown that for several sources the quality factor (Q) of the lower kilohertz Quasi-Periodic Oscillations (QPO) drops sh…