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Keck Measurement of the XTE J2123-058 Radial Velocity Curve
John A. Tomsick, William A. Heindl, Deepto Chakrabarty +2
We measured the radial velocity curve of the companion of the neutron star X-ray transient XTE J2123-058. Its semi-amplitude (K_2) of 298.5 +/- 6.9 km/s is the highest value that h…
X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - II. Timing
Emrah Kalemci, John A. Tomsick, R. E. Rothschild +2
We investigate the timing behavior of XTE J1550-564 with the Rossi X-ray Timing Explorer (RXTE) as the source made a transition to the hard state during the decay of the 2000 outbu…
X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - I. Chandra and RXTE Energy Spectra
John A. Tomsick, Stephane Corbel, Philip Kaaret
We report on the evolution of the X-ray energy spectrum for the black hole candidate (BHC) X-ray transient XTE J1550-564 during the decay of the 2000 outburst. The Rossi X-ray Timi…
X-ray states and radio emission in the black hole candidate XTE J1550-564
S. Corbel, P. Kaaret, R. K. Jain +8
We report on radio and X-ray observations of the black hole candidate (BHC) XTE J1550-564 performed during its 2000 X-ray outburst. Observations have been conducted with the Austra…
HEXTE Studies of Sco X-1 Spectra: Detections of Hard X-Ray Tails Beyond 200 keV
F. D'Amico, W. A. Heindl, R. E. Rothschild +4
Using the HEXTE experiment on-board the RXTE satellite, we performed a search for hard X-ray tails in Sco X-1 spectra. We found strong evidence for the presence of such a non-therm…