Bayesian quadrature for ratios
Journal of Machine Learning Research 22 (2012) 832-840
Abstract:
We describe a novel approach to quadrature for ratios of probabilistic integrals, such as are used to compute posterior probabilities. This approach offers performance superior to Monte Carlo methods by exploiting a Bayesian quadrature framework. We improve upon previous Bayesian quadrature techniques by explicitly modelling the nonnegativity of our integrands, and the correlations that exist between them. It offers most where the integrand is multi-modal and expensive to evaluate. We demonstrate the efficacy of our method on data from the Kepler space telescope.Two years of polar winter observations with the ASTEP400 telescope
Proceedings of SPIE - The International Society for Optical Engineering 8444 (2012)
Abstract:
The ASTEP program is dedicated to exo-planet transit search from the Concordia Station located at Dome C, Antarctica. It comprises two instruments: a fixed 10cm refractor pointed toward the celestial South Pole, and a 400mm Newton telescope with a 1×1 degree field of view. This work focuses on the latter instrument. It has been installed in November 2009, and has been observing since then during the two polar winters 2010 and 2011. After presenting the main science observing programs, we review the telescope installation, performance, and describe its operating conditions as well as the data reduction and handling strategy. The resulting lightcurves are generally very stable and of excellent quality, as shown by continuous observations of WASP-19 that we present here. © 2012 SPIE.Probing the haze in the atmosphere of HD 189733b with HST/WFC3 transmission spectroscopy
ArXiv e-prints (2012)
Transiting exoplanets from the CoRoT space mission. XXI. CoRoT-19b: a low density planet orbiting an old inactive F9V-star
åp 537 (2012) A136-A136
A Gaussian process framework for modelling instrumental systematics: application to transmission spectroscopy
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 419:3 (2012) 2683-2694