| Téléchargement | - Voir le manuscrit accepté : Astrometry and photometry in high contrast imaging: ADI/LOCI biases and the SOSIE/LOCI solution (PDF, 628 Kio)
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| Auteur | Rechercher : Galicher, Raphaël1; Rechercher : Marois, Christian1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Conférence | 2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011, September 25-30, 2011, Victoria, BC Canada |
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| Résumé | The direct exoplanet imaging field will strongly benefit from the higher angular resolution achieved by next generation 30+m telescopes. To fully take advantage of these new facilities, one of the biggest challenges that ground-based adaptive optics imaging must overcome is to derive accurate astrometry and photometry of point sources. The planet photometry and its astrometry are used to compare with atmospheric models and to fit orbits. If erroneous numbers are found, or if errors are underestimated, spurious fits can lead to unphysical planet characteristics or wrong/unstable orbits. Overestimating the errors also needs to be avoided as it degrades the value of the data. Several photometry/astrometry biases that are induced by advance imaging and processing techniques (such as ADI/SSDI/LOCI) are presented as well as a procedure to properly overcome those effects. These solutions will be implemented in the Gemini Planet Imager campaign data pipeline and it is expected that they will also play a crucial role in any future direct exoplanet imaging survey. |
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| Date de publication | 2011 |
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| Maison d’édition | Office National d'Etudes et de Recherches Aerospatiales, ONERA |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 23004524 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 5cc1e1f2-ab27-4fe5-a876-c1f69b241047 |
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| Enregistrement créé | 2018-11-14 |
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| Enregistrement modifié | 2020-06-03 |
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