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The Timing Evolution of 4U 1630-47 During its 1998 Outburst
S. W. Dieters, T. Belloni, E. Kuulkers +8
We report on the evolution of the timing of 4U1630-47 during its 1998 outburst using data obtained with the Rossi X-ray Timing Explorer (RXTE). The count rate and position in hardn…
Correlations between Low-Frequency QPOs and Spectral Parameters in XTE J1550-564 and GRO J1655-40
Gregory J. Sobczak, Jeffrey E. McClintock, Ronald A. Remillard +5
Utilizing observations obtained with the Rossi X-ray Timing Explorer, we examine correlations between the properties of 0.08-22 Hz variable frequency QPOs and the X-ray spectral pa…
Evidence for Doppler-Shifted Iron Emission Lines in Black Hole Candidate 4U 1630-47
Wei Cui, Wan Chen, S. N. Zhang
We report the first detection of a pair of correlated emission lines in the X-ray spectrum of black hole candidate 4U 1630-47 during its 1996 outburst, based on RXTE observations o…
Phase Lags of QPOs in Microquasar GRS 1915+105
Wei Cui
I report the discovery of hard X-ray phase lags associated with the famous 67 Hz quasi-periodic oscillation (QPO) in microquasar GRS 1915+105. The QPO is seen on multiple occasions…
X-ray Orbital Modulation of Cygnus X-1
Linqing Wen, Wei Cui, Alan M. Levine +1
We have analyzed over 2 years of RXTE/ASM data for Cygnus X-1. We have detected the 5.6-day orbital period in Lomb-Scargle periodograms of both light curves and hardness ratios whe…