3 papers
astro-ph1997
A varying kHz peak separation in 4U 1608-52
M. Mendez, M. van der Klis, J. van Paradijs +6
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of…
astro-ph1997
Discovery of a second kHz QPO peak in 4U 1608-52
M. Mendez, M. van der Klis, J. van Paradijs +6
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of…
astro-ph1996
Discovery of Sub-Millisecond Quasi-Periodic Oscillations in the X-Ray Flux of Scorpius X-1
M. Van der Klis, J. H. Swank, W. Zhang +5
We report the discovery, with NASA's Rossi X-ray Timing Explorer (RXTE), of the first sub-millisecond oscillation found in a celestial X-ray source. The quasi-periodic oscillations…