Reference : Pushing the precision limit of ground-based eclipse photometry
Reports : Other
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/4629
Pushing the precision limit of ground-based eclipse photometry
English
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Anderson, D. R. [> > > >]
Demory, B *-O [> > > >]
Wilson, D. M. [> > > >]
Hellier, C. [> > > >]
Queloz, D. [> > > >]
Waelkens, C. [> > > >]
1-Jun-2008
ArXiv e-prints
[en] Astrophysics
[en] 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.
http://hdl.handle.net/2268/4629
http://adsabs.harvard.edu/abs/2008arXiv0806.4911G
0806
4911
Transiting Planets Proceeding IAU Symposium No.253, 2008. 7 pages, 4 figures

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