CRIFO, F.; JASNIEWICZ, Gérard; SOUBIRAN, C.; VELTZ, L.; HESTROFFER, D.; KATZ, D.; SIEBERT, A.; UDRY, S.

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Licence d’utilisation du document

CRIFO, F.
Galaxies, Etoiles, Physique, Instrumentation [GEPI]

JASNIEWICZ, Gérard
Groupe de Recherche en Astronomie et Astrophysique du Languedoc [GRAAL]

SOUBIRAN, C.
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

Langue

Communication dans un congrès

Ce document a été publié dans

SF2A-2009: Proceedings of the Annual meeting of the French - Society of Astronomy and Astrophysics, 2009-06-29, Besançon. 2009p. 267

Résumé en anglais

The Gaia-RVS is a integral-field spectrograph with no calibration device onboard. The instrument will be self-calibrated through the reduction procedure; but it needs a list of well-know stars to define the zero-point and to initiate the iterative reduction process. The IAU RV-standards are not numerous enough (some 140 objects; whereas some 1500 are needed), and many are too bright for the RVS. A new list has been defined, with criteria adapted to the RVS capabilities: magnitude and spectral range, no double stars, no variables, "clean" environment up to 80 arcsec, uniform sky coverage. The stars were taken from a few existing good lists, and each one needs to be reobserved at least 2 times before launch (2012), and also during the mission (end 2018). The list is now ready, and the reobservations are going on at high rate. This list should be released in a near future, so that everyone can use it, and eventually improve it.< Réduire

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Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804