ISSN:
1572-9508
Keywords:
Asteroseismology
;
Photometry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract EVRIS is the first space experiment dedicated to asteroseismology. It is designed to measure the relative time variations of the flux of several bright stars and to detect their modes of pulsation. As the amplitudes of these oscillations should be very small (a few ppm), the instrument has to perform relative photometry with an extremely high accuracy, i.e. hundred times better than the classical accuracy reached from the ground. The experiment is composed of a star tracker and a photometer, mounted on a pointing platform PAIS. This paper describes the mechanical and optical design and the performance of EVRIS, as well as the properties of the pointing system. It is shown that the EVRIS/PAIS complex meets the scientific specifications for a list of targets well suited for asteroseismology. The EVRIS collaboration is composed of: G. Epstein, J.P. Michel, F. Rakotoarivelo, F. Roubaud and A. Mangeney Observatoire de Paris (DESPA) 92195 Meudon, France A. Magnan, J.C. David Laboratoire d'Astronomie Spatiale, BP8 - Traverse du Siphon, 13012 Marseille, France J.T. Buey Observatoire de Paris (DESPA) 92195 Meudon, France Observatoire de Paris (DASGAL) 92195 Meudon, France R. Bellenger Département d'Astrophysique Extragalactique et de Cosmologie, Observatoire de Paris, France M. Gelbmann, U. Heiter, F. Hiesberger, R. Kuschnig and E. Paunzen Institut für Astronomie, Wien Austria
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008001904313
