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A variable near-infrared counterpart to the neutron-star low-mass X-ray binary 4U 1705-440
Jeroen Homan, David L. Kaplan, Maureen van den Berg +1
We report the discovery of a near-infrared (nIR) counterpart to the persistent neutron-star low-mass X-ray binary 4U 1705-440, at a location consistent with its recently determined…
Chandra and Swift observations of the quasi-persistent neutron star transient EXO 0748-676 back to quiescence
N. Degenaar, R. Wijnands, M. T. Wolff +8
The quasi-persistent neutron star X-ray transient and eclipsing binary EXO 0748-676 recently started the transition to quiescence following an accretion outburst that lasted more t…
A search for iron emission lines in the Chandra X-ray spectra of neutron star low-mass X-ray binaries
E. M. Cackett, J. M. Miller, J. Homan +6
While iron emission lines are well studied in black hole systems, both in X-ray binaries and Active Galactic Nuclei, there has been less of a focus on these lines in neutron star l…
Disk Dominated States of 4U 1957+11: Chandra, XMM, and RXTE Observations of Ostensibly the Most Rapidly Spinning Galactic Black Hole
Michael A. Nowak, Adrienne Juett, Jeroen Homan +4
We present simultaneous Chandra-HETG and RXTE observations of a moderate flux `soft state' of the black hole candidate 4U1957+11. These spectra, having a minimally discernible hard…
Luminosity dependence of the electron temperature in the bright hard state of the black hole candidate GX 339--4
Takehiro Miyakawa, Kazutaka Yamaoka, Jeroen Homan +4
We have analyzed 200 Rossi X-ray Timing Explorer observations of the black hole candidate GX 339--4, all from the bright hard state periods between 1996 and 2005. Purpose of our st…
Chandra detection of XTE J1650-500 in quiescence and the minimum luminosity of black hole X-ray binaries
Elena Gallo, Jeroen Homan, Peter Jonker +1
The Galactic black hole X-ray binary XTE J1650-500 entered a quiescent regime following the decline from the 2001-2002 outburst that led to its discovery. Here we report on the fir…