Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b

@article{Gillon2009ImprovedPF,
  title={Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b},
  author={Micha{\"e}l Gillon and Barry Smalley and Leslie Hebb and D. R. Anderson and A. H. M. J. Triaud and Coel Hellier and Pierre F. L. Maxted and Didier Queloz and D. Queloz Observatoire de l'Universite de Geneve and Universit'e de Geneve and Switzerland Astrophysics Group and Keele University and Staffordshire and UK Department of Physics and Astronomy and University of St. Andrews and North Haugh and Fife and UK.},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={496},
  pages={259-267}
}
The gaseous giant planets WASP-4b and WASP-5b are transiting 12-magnitude solar-type stars in the Southern hemisphere. The aim of the present work is to refine the parameters of these systems using high cadence VLT/FORS2 z-band transit photometry and highresolution VLT/UVES spectroscopy. For WASP-4, the new estimates for the planet radius and mass from a combined analysis of our VLT data with previously published transit photometry and radial velocities are Rp = 1.30 +0.05 −0.04 RJ and Mp = 1… 
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