Ultraviolet Spectroscopy of Binary Systems

Time-resolved ultraviolet spectroscopy of the compact interacting binary QU Car

We present HST/STIS (1160–1700Å) echelle spectra of the cataclysmic variable (CV) star, QU Car, at three epochs. In catalogues this binary is classified as a nova-like variable. QU Car was observed three times in time-tag mode for 2300 sec, 2600 sec and 2600 sec, allowing us to study the spectral time evolution on timescales down to ∼10 sec. We find evidence of a high-state non-magnetic CV at l...

Optimal Wavelength Selection in Ultraviolet Spectroscopy for the Estimation of Toxin Reduction Ratio during Hemodialysis

Introduction The concentration of substances, including urea, creatinine, and uric acid, can be used as an index to measure toxic uremic solutes in the blood during dialysis and interdialytic intervals. The on-line monitoring of toxin concentration allows for the clearance measurement of some low-molecular-weight solutes at any time during hemodialysis.The aim of this study was to determine the...

Deep-ultraviolet cavity ringdown spectroscopy.

The sensitive optical detection technique of cavity ringdown spectroscopy is extended to the wavelength range 197-204 nm. A novel design narrowband Fourier-transform-limited laser is used, and the technique is applied to gas-phase extinction measurements in CO2, SF6, and O2. Further demonstration of the system capabilities is given in high-resolution recordings of the Schumann-Runge (0, 0), (1,...

Binary black hole spectroscopy

Abstract We study parameter estimation with post-Newtonian (PN) gravitational waveforms for the quasicircular, adiabatic inspiral of spinning binary compact objects. In particular, the performance of amplitude-corrected waveforms is compared with that of the more commonly used restricted waveforms, in Advanced LIGO and EGO. With restricted waveforms, the properties of the source can only be ext...

Ultraviolet Photoelectron Spectroscopy of Organic Anions