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Observation of Kilohertz Quasiperiodic Oscillations from the Atoll Source 4U 1702-429
Craig B. Markwardt, Tod E. Strohmayer, Jean H. Swank
We present results of Rossi X-Ray Timing Explorer (XTE) observations of the atoll source 4U 1702-429 in the middle of its luminosity range. Kilohertz-range quasiperiodic oscillatio…
ASCA Discovery of an X-ray Pulsar in the Error Box of SGR1900+14
K. Hurley, P. Li, C. Kouveliotou +9
We present a 2 - 10 keV ASCA observation of the field around the soft gamma repeater SGR1900+14. One quiescent X-ray source was detected in this observation, and it was in the SGR…
Discovery of a magnetar associated with the Soft Gamma Repeater SGR 1900+14
Chryssa Kouveliotou, Tod Strohmayer, Kevin Hurley +6
The soft-gamma repeater SGR 1900+14 became active again on June 1998 after a long period of quiescence; it remained at a low state of activity until August 1998, when it emitted a…
The Long Term Stability of Oscillations During Thermonuclear X-ray Bursts: Constraining the Binary X-ray Mass Function
Tod E. Strohmayer, William Zhang, Jean H. Swank +1
We report on the long term stability of the millisecond oscillations observed with the Rossi X-ray Timing Explorer (RXTE) during thermonuclear X-ray bursts from the low mass X-ray…
Spin-down rate of 1E 2259+586 from RXTE observation
A. Baykal, J. H. Swank, M. J. Stark +1
We present new X-ray observations of the X-ray pulsar 1E 2259+586, obtained during March 1997, with the Rossi X-Ray Timing Explorer (RXTE). We have measured the pulse frequency der…
Discovery of Two Simultaneous Kilohertz QPOs in the Persistent Flux of GX 349+2
W. Zhang, T. E. Strohmayer, J. H. Swank
We report the discovery of two simultaneous quasi-periodic oscillations in the persistent flux of GX 349+2 at frequencies 712 +/- 9 and 978 +/- 9 Hz, with rms amplitudes 1.25% +/-…