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Optical spectra of the carbon-oxygen accretion discs in the ultra-compact X-ray binaries 4U 0614+09, 4U 1543-624 and 2S 0918-549
G. Nelemans, P. G. Jonker, T. R. Marsh +1
We present optical spectra in the range 4600 -- 8600 A for three low-mass X-ray binaries which have been suggested to belong to the class of ultra-compact X-ray binaries based on t…
The faint neutron star soft X-ray transient SAX J1810.8-2609 in quiescence
P. G. Jonker, R. Wijnands, M. van der Klis
We present the analysis of a 35 ksec long Chandra observation of the neutron star soft X-ray transient (SXT) SAX J1810.8-2609. We detect three sources in the field of view. The pos…
Extended X-ray emission in the high redshift quasar GB 1508+5714 at z=4.3
W. Yuan, A. C. Fabian, A. Celotti +1
We report the discovery of extended X-ray emission around the powerful high-redshift quasar GB 1508+5714 at z=4.3, revealed in a long Chandra ACIS observation. The emission feature…
MS 1603.6+2600: an Accretion Disc Corona source?
P. G. Jonker, M. van der Klis, C. Kouveliotou +3
We have observed the eclipsing low-mass X-ray binary MS1603.6+2600 with Chandra for 7 ksec. The X-ray spectrum is well fit with a single absorbed powerlaw with an index of ~2. We f…
Jet-dominated states: an alternative to advection across black hole event horizons in `quiescent' X-ray binaries
R. P. Fender, E. Gallo, P. G. Jonker
We demonstrate that at relatively low mass accretion rates, black hole candidate (BHC) X-ray binaries (XRBs) should enter `jet-dominated' states, in which the majority of the liber…