Multi-frequency estimates of fish abundance: constraints of rather high frequencies   总被引：10，自引：5，他引：5  

Horne  J. K.; Jech  J. M. 《ICES Journal of Marine Science》1999,56(2):184-199

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Efficient identification of exoplanetary transit candidates from SuperWASP light curves     

A. Collier Cameron  D. M. Wilson  R. G. West  L. Hebb  X.-B. Wang  S. Aigrain  F. Bouchy  D. J. Christian  W. I. Clarkson  B. Enoch  M. Esposito  E. Guenther  C. A. Haswell  G. Hébrard  C. Hellier  K. Horne  J. Irwin  S. R. Kane  B. Loeillet  T. A. Lister  P. Maxted  M. Mayor  C. Moutou  N. Parley  D. Pollacco  F. Pont  D. Queloz  R. Ryans  I. Skillen  R. A. Street  S. Udry  P. J. Wheatley 《Monthly notices of the Royal Astronomical Society》2007,380(3):1230-1244

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SuperWASP-N extrasolar planet candidates between 18 < RA < 21 h     

R. A. Street  D. J. Christian  W. I. Clarkson  A. Collier Cameron  B. Enoch  S. R. Kane  T. A. Lister  R. G. West  D. M. Wilson  A. Evans  A. Fitzsimmons  C. A. Haswell  C. Hellier  S. T. Hodgkin  K. Horne  J. Irwin  F. P. Keenan  A. J. Norton  J. Osborne  D. L. Pollacco  R. Ryans  I. Skillen  P. J. Wheatley  J. Barnes 《Monthly notices of the Royal Astronomical Society》2007,379(2):816-832

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The WASP Project and SuperWASP Camera     

D. Pollacco  I. Skillen  A. Cameron  D. Christian  J. Irwin  T. Lister  R. Street  R. West  W. Clarkson  N. Evans  A. Fitzsimmons  C. Haswell  C. Hellier  S. Hodgkin  K. Horne  B. Jones  S. Kane  F. Keenan  A. Norton  J. Osborne  R. Ryans  P. Wheatley 《Astrophysics and Space Science》2006,304(1-4):253-255

The WASP project and infrastructure supporting the SuperWASP Facility are described. As the instrument, reduction pipeline and archive system are now fully operative we expect the system to have a major impact in the discovery of bright exo-planet candidates as well in more general variable star projects.  相似文献   

The SuperWASP wide-field exoplanetary transit survey: candidates from fields 23 h < RA < 03 h     

D. J. Christian  D. L. Pollacco  I. Skillen  R. A. Street  F. P. Keenan  W. I. Clarkson  A. Collier Cameron  S. R. Kane  T. A. Lister  R. G. West  B. Enoch  A. Evans  A. Fitzsimmons  C. A. Haswell  C. Hellier  S. T. Hodgkin  K. Horne  J. Irwin  A. J. Norton  J. Osborne  R. Ryans  P. J. Wheatley  D. M. Wilson 《Monthly notices of the Royal Astronomical Society》2006,372(3):1117-1128

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The remarkable rapid X-ray, ultraviolet, optical and infrared variability in the black hole XTE J1118+480   总被引：1，自引：0，他引：1  

R. I. Hynes †  C. A. Haswell  W. Cui  C. R. Shrader  K. O'Brien  S. Chaty  D. R. Skillman  J. Patterson  Keith Horne 《Monthly notices of the Royal Astronomical Society》2003,345(1):292-310

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 time-resolved X-ray, ultraviolet, optical and infrared data spanning the plateau phase of the outburst. We find that both X-ray and infrared bands show large amplitude variability. The ultraviolet and optical variability is more subdued, but clearly correlated with that seen in the X-rays. The ultraviolet, at least, appears to be dominated by the continuum, although the lines are also variable. Using the X-ray variations as a reference point, we find that the ultraviolet (UV) variability at long wavelengths occurs later than that at short wavelengths. Uncertainty in the Hubble Space Telescope timing prohibits a determination of the absolute lag with respect to the X-rays, however. The transfer function is clearly not a delta-function, exhibiting significant repeatable structure. For the main signal we can rule out an origin in reprocessing on the companion star – the lack of variation in the lags is not consistent with this, given a relatively high orbital inclination. Weak reprocessing from the disc and/or companion star may be present, but is not required, and another component must dominate the variability. This could be variable synchrotron emission correlated with X-ray variability, consistent with our earlier interpretation of the infrared (IR) flux as due to synchrotron emission rather than thermal disc emission. In fact, the broad-band energy distribution of the variability from IR to X-rays is consistent with expectations of optically thin synchrotron emission. We also follow the evolution of the low-frequency quasi-periodic oscillation in X-rays, UV, and optical. Its properties at all wavelengths are similar, indicating a common origin.  相似文献   

The Millennium Galaxy Catalogue: star counts and the structure of the Galactic stellar halo     

D. J. Lemon  Rosemary F. G. Wyse †  J. Liske  S. P. Driver  Keith Horne 《Monthly notices of the Royal Astronomical Society》2004,347(4):1043-1054

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A search for starlight reflected from HD 75289b     

Christopher Leigh  rew Collier Cameron  Stephane Udry  Jean-François Donati  Keith Horne  David James  Alan Penny 《Monthly notices of the Royal Astronomical Society》2003,346(2):L16-L20

We have used a Doppler tomographic analysis to conduct a deep search for the starlight reflected from the planetary companion to HD 75289. In four nights on VLT(UT2)/UVES in 2003 January, we obtained 684 high-resolution echelle spectra with a total integration time of 26 h. We establish an upper limit on the geometric albedo of the planet   p < 0.12  (to the 99.9 per cent significance level) at the most probable orbital inclination   i ≃ 60°  , assuming a grey albedo, a Venus-like phase function and a planetary radius   R _p= 1.6 R_Jup  . We are able to rule out some combinations of the predicted planetary radius and atmospheric albedo models with high, reflective cloud decks.  相似文献   

Constraints on Jupiters from observations of Galactic bulge microlensing events during 2000     

Yiannis Tsapras †  Keith Horne  Richard Carson  Javier Méndez Alvarez  Dan Batcheldor  Alister W. Graham  Philip A. James  Johan Knapen  Hannah Quaintrell  Ignacio Gonzalez Serrano  Peter Sorensen  Nick Wooder 《Monthly notices of the Royal Astronomical Society》2002,337(1):41-48

We present observations of eight Galactic bulge microlensing events taken with the 1.0-m Jacobus Kapteyn Telescope (JKT) on La Palma during 2000 June and July. The JKT observing schedule was optimized using a prioritizing algorithm to automatically update the target list. For most of these events we have sampled the light curves at times where no information was available from the OGLE alert team. We assume a point-source point-lens (PSPL) model and perform a maximum likelihood fit to both our data and the OGLE data to constrain the event parameters of the fit. We then refit the data assuming a binary lens and proceed to calculate the probability of detecting planets with mass ratio   q = 10⁻³  . We have seen no clear signatures of planetary deviations on any of the eight events and we quantify constraints on the presence of planetary companions to the lensing stars. For two well-observed events, 2000BUL31 and 2000BUL33, our detection probabilities peak at ∼30 and ∼20 per cent respectively for   q = 10⁻³  and   a ∼ R _E  for a  Δχ²  threshold value of 60.  相似文献   

Quasilongitudinal approximation for whistler-mode waves in the magnetospheric plasma     

S. S. Sazhin

R. B. Horne 《Planetary and Space Science》1990,38(12):1551-1553

The range of applicability of an improved quasilongitudinal approximation for whistler-mode waves in the equatorial magnetosphere (4 L 6.6) is specified based on the direct comparison between numerical solutions of the hot electromagnetic dispersion equation with the corresponding analytical quasilongitudinal solutions. It is pointed out that this approximation can be used at frequencies ω less than but not close to the electron gyrofrequency Ω (ω 0.6 Ω) and wave normal angles θ less than but not close to the resonance cone angle θ_R. At ω = 0.8 Ω the analytical results deviate considerably from numerical ones due to the strong damping of the waves, and so the quasilongitudinal solution becomes no longer valid.  相似文献