Article (Scientific journals)
Ground-based photometry of space-based transit detections: Photometric follow-up of the CoRoT mission
Deeg, H. J.; Gillon, Michaël; Shporer, A. et al.
2009In Astronomy and Astrophysics, 506, p. 343-352
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Keywords :
methods: observational; techniques: photometric; stars: planetary system; stars: binaries: eclipsing
Abstract :
[en] The motivation, techniques and performance of the ground-based photometric follow-up of transit detections by the CoRoT space mission are presented. Its principal raison d’être arises from the much higher spatial resolution of common ground-based telescopes in comparison to CoRoT’s cameras. This allows the identification of many transit candidates as arising from eclipsing binaries that are contaminating CoRoT’s lightcurves, even in low-amplitude transit events that cannot be detected with ground-based obervations. For the ground observations, “on” – “off” photometry is now largely employed, in which only a short timeseries during a transit and a section outside a transit is observed and compared photometrically. CoRoTplanet candidates’ transits are being observed by a dedicated team with access to telescopes with sizes ranging from 0.2 to 2 m. As an example, the process that led to the rejection of contaminating eclipsing binaries near the host star of the Super-Earth planet CoRoT-7b is shown. Experiences and techniques from this work may also be useful for other transit-detection experiments, when the discovery instrument obtains data with a relatively low angular resolution.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Deeg, H. J.
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Shporer, A.
Rouan, D.
Stecklum, B.
Aigrain, S.
Alapini, A.
Almenara, J.
Alonso, R. G.
Barbieri, M.
Bouchy, F.
Eislöfell, J.
Erikson, A Collier
Fridlund, M.
Eigmüller, P.
Handler, G.
Hatzes, A.
Kabath, P.
Lendl, M.
Mazeh, T.
Moutou, C.
Queloz, D.
Rauer, H.
Rabus, M. K.
Tingley, B.
Titz, R.
More authors (16 more) Less
Language :
English
Title :
Ground-based photometry of space-based transit detections: Photometric follow-up of the CoRoT mission
Publication date :
2009
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Special issue title :
The CoRoT space mission: early results
Volume :
506
Pages :
343-352
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 November 2009

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