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- W2168963029 abstract "The search for exoplanets has gone from the realm of speculation to beingone of the most prolific topics of modern astronomy in the space of just 20 years.In particular, the geometric alignment of transiting exoplanets provides the addedopportunity to measure a host of properties of these systems, including studies ofplanetary atmospheres.The vast majority of known transiting exoplanets to date were found usingdedicated ground-based surveys such as the SuperWASP project. Such enterprisescomprise of multiple small telescopes designed to perform high-precision photometryover a wide field of view and rely on efficiently compensating for several noisecontributions. An analysis of the sources of noise in the SuperWASP light curveswas performed, focussing on systematic e↵ects fixed in detector space. A study ofa set of detector maps produced from the average of the fractional residuals of thelight curves in CCD coordinates has revealed that the current flat-fielding strategyis introducing a component of red noise into the light curves due to the wavelengthdependentnature of the CCDs. The possibility of using such maps as a basis for anadditional decorrelation step in the software pipeline is discussed.The next phase in planetary discoveries from ground-based surveys consistsof the search for smaller planets and those in longer orbits around their host stars.This process involves an observing strategy that focuses on intensive coverage ofparticular locations of the sky. We develop simulation software to aid the choice ofobserved fields for the SuperWASP and Next Generation Transit Survey (NGTS)projects in order to maximise the chances of finding planets at those locations.Moreover, this simulation can be used for comparative studies of the planet findingprobability for several design choices and has been used to justify the necessity tocommission the NGTS instrument at ESO’s Paranal Observatory in order to benefitfrom one of the World’s premier sites.The increasing number of known transiting planets has triggered a new phaseof exoplanet exploration, in which the properties of the atmospheres of these planetsare being explored using techniques such as transmission spectroscopy. This processconsists of measuring an enhanced transit depth at particular wavelengths due tothe presence of opacity sources in the atmospheres of exoplanets. We use the multibandphotometer ULTRACAM to attempt a similar measurement via the techniqueof transmission photometry for the highly inflated planets WASP-15b and WASP-17b. The data are found to be dominated by systematic errors and a detailed studyof the possible sources is performed." @default.
- W2168963029 created "2016-06-24" @default.
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- W2168963029 date "2012-07-01" @default.
- W2168963029 modified "2023-10-16" @default.
- W2168963029 title "Research and development of ground-based transiting extrasolar planet projects" @default.
- W2168963029 hasPublicationYear "2012" @default.
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