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Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission *
Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission *
- Source :
- Astronomy and Astrophysics; October 2009, Vol. 506 Issue: 1 p343-352, 10p
- Publication Year :
- 2009
-
Abstract
- 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'êtrearises 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.
Details
- Language :
- English
- ISSN :
- 00046361 and 14320746
- Volume :
- 506
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Astronomy and Astrophysics
- Publication Type :
- Periodical
- Accession number :
- ejs53147274
- Full Text :
- https://doi.org/10.1051/0004-6361/200912011