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Transitions of black hole transients to the low/hard state under the microscope
E. Kalemci, J. A. Tomsick, R. E. Rothschild +2
We characterized the evolution of spectral and temporal properties of several Galactic black hole transients observed between 1996-2001 using the data from well sampled PCA observa…
A close look at the state transitions of Galactic black hole transients during outburst decay
E. Kalemci, J. A. Tomsick, R. E. Rothschild +2
We characterize the evolution of spectral and temporal properties of several Galactic black hole transients during outburst decay using the data from well sampled PCA/\rxte observa…
Chandra Detections of Two Quiescent Black Hole X-Ray Transients
John A. Tomsick, Stephane Corbel, Rob Fender +6
Using the Chandra X-ray Observatory, we have detected the black hole transients V4641 Sgr and XTE J1859+226 in their low luminosity, quiescent states. The 0.3-8 keV luminosities ar…
INTEGRAL discovery of a bright highly obscured galactic X-ray binary source IGR J16318-4848
R. Walter, J. Rodriguez, L. Foschini +8
INTEGRAL regularly scans the Galactic plane to search for new objects and in particular for absorbed sources with the bulk of their emission above 10-20 keV. The first new INTEGRAL…
Chandra/HETGS Spectroscopy of the Galactic Black Hole GX 339-4: A Relativistic Iron Line and Evidence for a Seyfert-like Warm Absorber
J. M. Miller, J. Raymond, A. C. Fabian +9
We observed the Galactic black hole GX 339-4 with the Chandra High Energy Transmission Grating Spectrometer (HETGS) for 75 ksec during the decline of its 2002-2003 outburst. The se…
Spectral evolution of the microquasar XTE J1550-564 over its entire 2000 outburst
J. Rodriguez, S. Corbel, J. A. Tomsick
We report on RXTE observations of the microquasar XTE J1550-564 during a ~70 day outburst in April-June 2000. We study the evolution of the PCA+HEXTE spectra over the outburst. The…
X-Ray Flares and Oscillations from the Black Hole Candidate X-Ray Transient XTE J1650-500 at Low Luminosity
John A. Tomsick, Emrah Kalemci, Stephane Corbel +1
We report on X-ray observations made with the Rossi X-ray Timing Explorer of the black hole candidate (BHC) transient XTE J1650-500 at the end of its first, and currently only, out…
An XMM Observation of IGR J16320-4751=AX J1631.9-4752
J. Rodriguez, J. A. Tomsick, L. Foschini +4
The hard X-ray sensitivity and arcminute position accuracy of the recently launched International Gamma-Ray Laboratory (INTEGRAL) has lead to the (re-)discovery of a class of heavi…
Discovery of X-Ray Burst Oscillations from a Neutron-Star X-Ray Transient in the Globular Cluster NGC 6440
P. Kaaret, J. J. M. in 't Zand, J. Heise +1
We report the discovery of millisecond oscillations in an X-ray burst from the X-ray transient SAX J1748.9-2021 in the globular cluster NGC 6440. Oscillations at a frequency of 409…
Extended Emission from Cygnus X-3 Detected with Chandra
W. A. Heindl, J. A. Tomsick, R. Wijnands +1
We have discovered extended X-ray emission from the microquasar Cyg X-3 in archival Chandra X-ray Observatory observations. A 5" wide structure lies approximately 16" to the NE fro…