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New Evidence for Black Hole Event Horizons from Chandra
Michael R. Garcia, Jeffrey E. McClintock, Ramesh Narayan +2
Previously we claimed that Black Hole X-ray Novae (BHXN) in quiescence are much less luminous than equivalent Neutron Star X-ray Novae (NSXN). This claim was based on the quiescent…
Chandra Observations of M31
M. R. Garcia, S. S. Murray, F. A. Primini +3
As part of the Chandra GTO program we are monitoring and surveying M31 using the HRC and ACIS cameras. These observations have resolved the nuclear X-ray source into five separate…
Chandra Observations of M31 and their Implications for its ISM
F. Primini, M. Garcia, S. Murray +3
We have been regularly observing the bulge and inner disk of M31 for nearly 1 year, using both the HRC-I and ACIS-I instruments on the Chandra X-Ray Observatory. We present results…
The Quiescent Emission Spectrum of Cen X-4 and other X-ray Transients containing Neutron Stars
Kristen Menou, Jeffrey E. McClintock
We use the observed optical-UV and X-ray emission spectrum of Cen X-4 during quiescence to constrain models for the accretion flow in this system. We argue that the optical-UV emis…
Optical Observations of the Black Hole Candidate XTE J1550-564 During Re-Flare and Quiescence
Raj K. Jain, Charles D. Bailyn, Jerome A. Orosz +3
We report optical monitoring of the soft X-ray transient XTE J1550-564 during the 1999 season (4 January 1999 to 24 August 1999). The first optical observations available in 1999 s…
Complete RXTE Spectral Observations of the Black Hole X-ray Nova XTE J1550-564
Gregory J. Sobczak, Jeffrey E. McClintock, Ronald A. Remillard +5
We report on the X-ray spectral behavior of the exceptionally bright X-ray nova XTE J1550-564 during its 1998-99 outburst. Our study is based on 209 pointed observations using the…