oai-hal-tel-00875652v1
type: Dataset
description: From all exoplanet detection methods, transit photometry went through the quickest growth over the last few years thanks to the two space telescopes, CoRoT (in 2006) and Kepler (in 2009). These two satellites have identified thousands of potentially planetary transits. Given the number of detected transits and the effort required to demonstrate their natures, it is essential to perform, from photometric data only, a ranking allowing to efficiently identify the most promising transits within a reasonable period of time. For my thesis, I have developed a quick and automated software called bart (Bayesian Analysis for the Ranking of Transits) which realizes such a ranking thanks to the estimation of the probability regarding the planetary nature of each transit. For this purpose, I am relying on the Bayesian framework and free parameter space exploration with Markov Chain Monte Carlo (mcmc) methods.Once you have detected exoplanets, the following step is to characterise them. The study of the solar system demonstrated, if it was necessary, that the spectral information is a crucial clue for the understanding of the physics and history of a planet. Nulling interferometry is a promising solution which could make this possible. For my thesis, I worked on the optical bench Nulltimate in order to study the feasibility of certain technological requirements associated with this technique. Beyond the obtention of a nulling ratio of 3,7.10^-5 in monochromatic light and 6,3.10^-4 in polychromatic light in the near infrared, as well as a stability of σN30 ms = 3,7.10^-5 estimated on 1 hour, my work allowed to clarify the situation thanks to a detailed error budget, a simulation of the transmission based on Gaussian beam optics and a complete overhaul of the computer control system. All of this finally resulted in the identification of the weaknesses of Nulltimate.
identifier: NNT: 2013PA112098
issued: 2026-05-09T07:04:24.138494
language: fr
modified: 2026-05-09T07:04:24.138498
title: Detection and characterisation of exoplanets : development and operation of the nulling interferometer testbed Nulltimate and design of an automated software for the ranking of transit candidates detected by CoRoT
contact point: Organization
  fn: CCSD
keyword: bayesian-model-comparison
keyword: comparaison-bayesienne-de-modeles
keyword: corot
keyword: dithering
keyword: extrasolar-planets
keyword: filtrage-modal
keyword: infoeu-reposemanticsdoctoralthesis
keyword: interferometrie-annulante
keyword: mcmc
keyword: nulling-interferometry
keyword: photometrie-des-transits
keyword: planetes-extrasolaires
keyword: sduothersciences-of-the-universe-physicsother
keyword: theses
keyword: transit-photometry
landing page: https://theses.hal.science/tel-00875652

https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00875652v1/resource/1e72f1db-3c40-4b48-93cd-d14af1fc60f1
type: Distribution
format: HTML
issued: 2026-05-09T07:04:24.161209
modified: 2026-05-09T07:04:24.124517
title: Detection and characterisation of exoplanets : development and operation of the nulling interferometer testbed Nulltimate and design of an automated software for the ranking of transit candidates detected by CoRoT
access URL: https://theses.hal.science/tel-00875652

test_moissonnage_selune
type: Agent