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Evidence for Black Hole Spin in GX 339-4: XMM-Newton EPIC-pn and RXTE Spectroscopy of the Very High State
J. M. Miller, A. C. Fabian, C. S. Reynolds +9
We have analyzed spectra of the Galactic black hole GX 339-4 obtained through simultaneous 76 ksec XMM-Newton/EPIC-pn and 10 ksec RXTE observations during a bright phase of its 200…
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…
Correlated Optical and X-ray Variability in LMC X-2
Katherine E. McGowan, Phil A. Charles, Darragh O'Donoghue +1
We have obtained high time resolution (seconds) photometry of LMC X-2 in December 1997, simultaneously with the Rossi X-ray Timing Explorer (RXTE), in order to search for correlate…
Chandra/HETGS Spectroscopy of the Galactic Black Hole GX 339-4: A Relativistic Iron Line and Evidence for a Seyfert-like Warm Absorber
J. M. Miller, J. Raymond, A. C. Fabian +9
We observed the Galactic black hole GX 339-4 with the Chandra High Energy Transmission Grating Spectrometer (HETGS) for 75 ksec during the decline of its 2002-2003 outburst. The se…
A Concept for an STJ-based Spectrograph
Mark Cropper, M. Barlow, M. A. C. Perryman +8
We describe a multi-order spectrograph concept suitable for 8m-class telescopes, using the intrinsic spectral resolution of Superconducting Tunneling Junction detectors to sort the…
Optical and near-infrared observations of the microquasar V4641 Sagittarii during the 1999 September outburst
S. Chaty, P. A. Charles, J. Marti +3
We present photometric and spectroscopic optical and near-infrared (NIR) observations (Based on observations collected at the European Southern Observatory, Chile (ESO ID 63.H-0493…
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…
Spectroscopic Identification of the Infrared Counterpart to GX5-1
R. M. Bandyopadhyay, T. Shahbaz, P. A. Charles
Using CGS4 on UKIRT, we have obtained a 1.95-2.45 micron infrared spectrum of the primary candidate counterpart to the bright Z LMXB GX5-1. IR photometry by Naylor, Charles, & Long…