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The Variable Warm Absorber in Circinus X-1
N. S. Schulz, T. E. Kallman, D. K. Galloway +1
We observed Circinus X-1 twice during a newly reached low-flux phase near zero orbital phase using the High-Energy Transmission Grating Spectrometer (HETGS) onboard Chandra. In bot…
XMM-Newton observations of PSR B1823-13: An asymmetric synchrotron nebula around a Vela-like pulsar
Bryan Gaensler, Norbert Schulz, Vicky Kaspi +2
We present a deep observation with the X-ray Multi-Mirror Mission of PSR B1823-13, a young pulsar with similar properties to the Vela pulsar. We detect two components to the X-ray…
The Chandra HETGS and RXTE view of GRS 1915+105
J. C. Lee, C. S. Reynolds, R. Remillard +3
The Chandra AO1 HETGS observation of the micro-quasar GRS 1915+105 in the low hard state reveals (1) neutral K absorption edges from Fe, Si, Mg, and S in cold gas, and (2) highly i…
A Chandra Spectroscopic Survey of Persistent Black Hole Candidates
W. Cui, Y. X. Feng, S. N. Zhang +3
We present results from observations of persistent black hole candidates with the High Energy Transmission Gratings aboard the Chandra X-ray Observatory. The sources include LMC X-…
Resolving the Composite Fe K-alpha Emission Line in the Galactic Black Hole Cygnus X-1 with Chandra
J. M. Miller, A. C. Fabian, R. Wijnands +8
We observed the Galactic black hole Cygnus X-1 with the Chandra High Energy Transmission Grating Spectrometer for 30 kiloseconds on 4 January, 2001. The source was in an intermedia…
High resolution Chandra HETG and RXTE observations of GRS 1915+105 : A hot disk atmosphere & cold gas enriched in Iron and Silicon
J. C. Lee, C. S. Reynolds, N. S. Schulz +3
The time-averaged 30 ks Chandra HETGS observation of the micro-quasar GRS 1915+105 in the low hard state reveals for the first time in this source neutral K absorption edges from F…