211 citations · 1.7k across the 43 of their papers we have counts for
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On the nature of HD 207331: a new Delta Scuti variable
L. Fox Machado, W. J. Schuster, C. Zurita +2
While testing a Stromgren spectrophotometer attached to the 1.5-m telescope at the San Pedro Martir observatory, Mexico, a number of A-type stars were observed, one of which, HD 20…
Time-resolved optical photometry of the ultra-compact binary 4U0614+091
T. Shahbaz, C. A. Watson, C. Zurita +2
We present a detailed optical study of the ultra-compact X-ray binary 4U0614+091. We have used 63 hrs of time-resolved optical photometry taken with three different telescopes (IAC…
Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2
S. V. Zharikov, G. H. Tovmassian, V. V. Neustroev +8
We have observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 and study the origin of a long-term variability found in its light curve. Multi-longitude time-resolved ph…
Swift J1753.5-0127: The Black Hole Candidate with the shortest orbital period
C. Zurita, M. Durant, M. A. P. Torres +3
We present time-resolved photometry of the optical counterpart to the black hole candidate Swift J1753.5-0127, which has remained in the low/hard X-ray state and bright at optical/…
The 2005 outburst of the halo black hole X-ray transient XTE J1118+480
C. Zurita, M. A. P. Torres, D. Steeghs +15
We present optical and infrared monitoring of the 2005 outburst of the halo black hole X-ray transient XTE J1118+480. We measured a total outburst amplitude of ~5.7+-0.1 mag in the…
A ZZ Ceti white dwarf in SDSS J133941.11+484727.5
B. T. Gaensicke, P. Rodriguez-Gil, T. R. Marsh +19
We present time-resolved spectroscopy and photometry of the cataclysmic variable (CV) SDSSJ133941.11+484727.5 (SDSS1339) which has been discovered in the Sloan Digital Sky Survey D…
ULTRACAM observations of the black hole X-ray transient XTE J1118+480 in quiescence
T. Shahbaz, V. S. Dhillon, T. R. Marsh +5
We present high time-resolution multicolour observations of the quiescent soft X-ray transient XTE J1118+480 obtained with ULTRACAM. Superimposed on the double-humped continuum g'…
Evidence for a Black Hole in the X-ray transient GS 1354-64 (=BW Cir)
J. Casares, C. Zurita, T. Shahbaz +2
We present the first radial velocity curve of the companion star to BW Cir which demonstrates the presence of a black hole in this X-ray transient which recorded outbursts in 1987…
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…
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…
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…
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…
The optical light curves of XTE J2123--058: the mass of the binary components and the structure of the quiescent accretion disk
T. Shahbaz, C. Zurita, J. Casares +4
We present optical photometry of XTE J2123-058 during its quiescent state taken in 1999 and 2000. The dominant feature of our R-band light curve is the ellipsoidal modulation of th…
The X-ray transient XTE J1859+226 in Outburst & Quiescence
C. Zurita, C. Sanchez-Fernandez, J. Casares +11
We present optical photometry and spectroscopy of the X-ray transient XTE J1859+226, obtained during outburst and its subsequent decay to quiescence. Both the X-ray and optical pro…
Detection of superhumps in XTE J1118+480 approaching quiescence
C. Zurita, J. Casares, T. Shahbaz +8
We present the results of our monitoring of the halo black-hole soft X-ray transient (SXT) XTE J1118+480 during its decline to quiescence. The system has decayed 0.5 mags from Dece…
Halpha Flares from V404 Cyg in Quiescence
R. I. Hynes, C. Zurita, C. A. Haswell +5
We present a spectrophotometric study of short-term optical variability in the quiescent black hole X-ray transient V404 Cyg. This includes two nights of high time-resolution Halph…
Spectrally resolved flares in the quiescent black hole V404 Cyg
R. I. Hynes, P. A. Charles, C. Zurita +3
We present a spectrophotometric study of short-term optical variability in the quiescent black hole X-ray transient V404 Cyg focusing on two nights of Halpha spectroscopy. We find…
VLT spectroscopy of XTE J2123-058 during quiescence
J. Casares, G. Dubus, T. Shahbaz +2
We present VLT low resolution spectroscopy of the neutron star X-ray transient XTE J2123-058 during its quiescent state. Our data reveal the presence of a K7V companion which contr…
Optical studies of the X-ray transient XTE J2123-058 - II. Phase-resolved spectroscopy
R. I. Hynes, P. A. Charles, C. A. Haswell +3
We present time-resolved spectroscopy of the soft X-ray transient XTE J2123-058 in outburst. A useful spectral coverage of 3700-6700A was achieved spanning two orbits of the binary…
Doppler Tomography of XTE J2123-058 and Other Neutron Star LMXBs
R. I. Hynes, P. A. Charles, C. A. Haswell +2
We describe Doppler tomography obtained in the 1998 outburst of the neutron star low mass X-ray binary (LMXB) XTE J2123-058. This analysis, and other aspects of phase-resolved spec…
Optical studies of the X-ray transient XTE J2123-058 -I. Photometry
C. Zurita, J. Casares, T. Shahbaz +6
We present optical photometry of the X-ray transient XTE J2123-058, obtained in July-October 1998. The light curves are strongly modulated on the 5.95hrs orbital period, and exhibi…