245 citations · 2.9k across the 76 of their papers we have counts for
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Kinematical Studies of the Low Mass X-Ray Binary GR Mus (XB1254-690)
A. D. Barnes, J. Casares, R. Cornelisse +4
We present simultaneous high-resolution optical spectroscopy and X-ray data of the X-ray binary system GR Mus (XB1254-690), obtained over a full range of orbital phases. The X-ray…
Optical spectroscopy of the low mass X-ray binary GX9+9
R. Cornelisse, D. Steeghs, J. Casares +4
Phase-resolved medium resolution VLT spectroscopy of the low mass X-ray binary GX9+9 has revealed narrow CIII emission lines that move in phase relative to our new estimate of the…
The Spectrum of the Black Hole X-ray Nova V404 Cygni in Quiescence as Measured by XMM-Newton
C. K. Bradley, R. I. Hynes, A. K. H. Kong +3
We present XMM observations of the black hole X-ray nova V404 Cygni in quiescence. Its quiescent spectrum can be best fitted by a simple power-law with slope 2. The spectra are con…
Detection of the Irradiated Donor in the LMXBs 4U 1636-536 (=V801 Ara) and 4U 1735-444 (=V926 Sco)
J. Casares, R. Cornelisse, D. Steeghs +4
Phase-resolved VLT spectroscopy of the bursting Low Mass X-ray Binaries 4U 1636-536/V801 Ara and 4U 1735-444/V926 Sco is presented. Doppler images of the NIII 4640 Bowen transition…
Further Evidence for Variable Synchrotron Emission in XTE J1118+480 in Outburst
R. I. Hynes, E. L. Robinson, K. J. Pearson +7
We present simultaneous multicolor infrared and optical photometry of the black hole X-ray transient XTE J1118+480 during its short 2005 January outburst, supported by simultaneous…
Global optical/infrared - X-ray correlations in X-ray binaries: quantifying disc and jet contributions
D. M. Russell, R. P. Fender, R. I. Hynes +4
The optical/near-infrared (OIR) region of the spectra of low-mass X-ray binaries appears to lie at the intersection of a variety of different emission processes. In this paper we p…
Observational Constraints Upon Cool Disk Material in Quiescent Black Hole Binaries
R. I. Hynes, E. L. Robinson, M. Bitner
We consider current observational constraints on the presence of cool, optically thick disk material in quiescent black hole binaries, specifically focusing on a case study of the…
The Dwarf Nova PQ Andromedae
Joseph Patterson, John Thorstensen, Eve Armstrong +2
We report a photometric study of the WZ Sagittae-type dwarf nova PQ Andromedae. The light curve shows strong (0.05 mag full amplitude) signals with periods of 1263(1) and 634(1) s,…
The radio spectrum of a quiescent stellar mass black hole
Elena Gallo, Rob Fender, Rob Hynes
Observations of V404 Cyg performed with the Westerbork Synthesis Radio Telescope at four frequencies, over the interval 1.4-8.4 GHz, have provided us with the first broadband radio…
Time-Resolved Ultraviolet Spectroscopy of the SW Sex Star DW UMa: Confirmation of a Hidden White Dwarf and the UV Counterpart to Phase 0.5 Absorption Events
Christian Knigge, Sofia Araujo-Betancor, Boris T. Gaensicke +5
We present time-resolved, ultraviolet (UV) spectroscopy of the SW Sex star DW UMa in the high state. We confirm that, shortward of 1500 Å, the high-state, UV continuum level is low…
Correlated X-ray and Optical Variability in X-ray Binaries
R. I. Hynes
It has long been known that X-ray and optical/UV variability in active X-ray binaries is sometimes correlated. The expectation has been that this arises from rapid reprocessing of…
The massive neutron star or low-mass black hole in 2S0921-630
T. Shahbaz, J. Casares, C. Watson +4
We report on optical spectroscopy of the eclipsing Halo LMXB 2S0921-630, that reveals the absorption line radial velocity curve of the K0III secondary star with a semi-amplitude K_…
Indirect evidence for an active radio pulsar in the quiescent state of the transient ms pulsar SAX J1808.4-3658
S. Campana, P. D'Avanzo, J. Casares +6
Millisecond radio pulsars are neutron stars that have been spun-up by the transfer of angular momentum during the low-mass X-ray binary phase. The transition from an accretion-powe…
Optical spectroscopy of flares from the black hole X-ray transient A0620-00 in quiescence
T. Shahbaz, R. I. Hynes, P. A. Charles +5
We present a time-resolved spectrophotometric study of the optical variability in the quiescent soft X-ray transient A0620-00. Superimposed on the double-humped continuum lightcurv…
Discovery of Optical Bursts from MS1603.6+2600 = UW CrB
R. I. Hynes, E. L. Robinson, E. Jeffery
We report the discovery of several optical burst-like events from the low-mass X-ray binary MS1603.6+2600 (UW CrB). The events last for a few tens of seconds, exhibit a very fast r…
Long-term optical/infrared variability in the quiescent X-ray transient V404 Cyg
C. Zurita, J. Casares, R. I. Hynes +3
We present the results of optical and infrared photometry of the quiescent X-ray transient V404 Cyg during the period 1992-2003. The ellipsoidal modulations extracted from the most…
The Distance and Interstellar Sight Line to GX339-4
R. I. Hynes, D. Steeghs, J. Casares +2
The distance to the black hole binary GX339-4 remains a topic of debate. We examine high-resolution optical spectra of the NaD lines resolving the velocity structure along the line…
Bowen Fluorescence from Companion Stars in X-ray Binaries
J. Casares, D. Steeghs, R. I. Hynes +3
This paper will review a new technique of detecting companion stars in LMXBs and X-ray transients in outburst using the Bowen fluorescence lines at 4634-4640 Angs. These lines are…
Spectroscopy of the Optical Counterpart to Ser X-1
R. I. Hynes, P. A. Charles, L. van Zyl +4
We present WHT and VLT spectroscopy of MM Ser, the optical counterpart to Ser X-1. We deblend the red spectra of the two close stars identified by Wachter (1997) and show that the…
Multicolour observations of V404 Cyg with ULTRACAM
T. Shahbaz, V. S. Dhillon, T. R. Marsh +5
We present high time-resolution multicolour observations of the quiescent soft X-ray transient V404 Cyg obtained with ULTRACAM. Superimposed on the secondary star's ellipsoidal mod…
Multiwavelength observations revealing the evolution of the outburst of the black hole XTE J1118+480
S. Chaty, C. A. Haswell, J. Malzac +3
We report multiwavelength observations of the soft X-ray transient (SXT) XTE J1118+480, which we observed with UKIRT, HST, RXTE, EUVE and many other instruments and facilities. Add…
The remarkable rapid X-ray, ultraviolet, optical, and IR variability in the black hole XTE J1118+480
R. I. Hynes, C. A. Haswell, W. Cui +6
The transient black hole binary XTE J1118+480 exhibited dramatic rapid variability at all wavelengths which were suitably observed during its 2000 April-July outburst. We examine t…
Bowen Fluorescence from the Companion Star in X1822-371
J. Casares, D. Steeghs, R. I. Hynes +2
We present a clear evidence for the motion of the companion star in the Low Mass X-Ray Binary (LMXB) X1822-371. We detect NIII lambda 4640 emission moving in antiphase with the rad…
Fast Photometry of Quiescent Soft X-ray Transients with the Gemini-South Acquisition Camera
R. I. Hynes, P. A. Charles, J. Casares +3
We present a compilation of high time-resolution photometric observations of quiescent soft X-ray transients obtained with the acquisition camera of Gemini-South. A0620-00 was obse…