Gillon, M and Anderson, DR and Demory, BO and Wilson, DM and Hellier, C and Queloz, D and Waelkens, C (2008) Pushing the precision limit of ground-based eclipse photometry. In: Transiting Planets (IAU S253). Proceedings of the International Astronomical Union Symposia and Colloquia . Cambridge University Press, Cambridge. ISBN 9780521889841

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Abstract

Until recently, it was considered by many that ground-based photometry could not reach the high cadence sub-mmag regime because of the presence of the atmosphere. Indeed, high frequency atmospheric noises (mainly scintillation) limit the precision that high SNR photometry can reach within small time bins. If one is ready to damage the sampling of his photometric time-series, binning the data (or using longer exposures) allows to get better errors, but the obtained precision will be finally limited by low frequency noises. To observe several times the same planetary eclipse and to fold the photometry with the orbital period is thus generally considered as the only option to get very well sampled and precise eclipse light curve from the ground. Nevertheless, we show here that reaching the sub-mmag sub-min regime for one eclipse is possible with a ground-based instrument. This has important implications for transiting planets characterization, secondary eclipses measurement and small planets detection from the ground.

Item Type: Book Section
Uncontrolled Keywords: astrophysics
Subjects: Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 11 Mar 2015 13:56
Last Modified: 11 Mar 2015 13:56
URI: http://eprints.keele.ac.uk/id/eprint/320

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