EAS Publications Series
Volume 14, 2005Dome C Astronomy and Astrophysics Meeting
|Page(s)||325 - 330|
|Published online||05 January 2006|
M. Giard, F. Casoli and F. Paletou (eds)
EAS Publications Series, 14 (2005) 325-330
Three-reflections telescope proposal as flat-field anastigmat for wide field observations at Dome C
Observatoire Astronomique de Marseille Provence, LAM - 2, place Leverrier, 13248 Marseille Cedex 4, France
2 Istituto di Astrofisica Spaziale e Fisica Cosmica, via Fosso del Cavaliere 100, 00133 Roma, Italy
3 Observatoire Astronomique de Marseille Provence, OHP, 04870 St. Michel l'Observatoire, France
It is now evident that the exceptional seeing at Dome C will allow, in the next years, to pursue astronomical programs with conditions better than at any other observatory in the world, and very close to space experiments. Considering a new type of wide-field telescope, particular astronomical programs could be well optimized for observations at Dome C such as surveys for the discovery and follow up of near-Earth asteroids, search for extra-solar planets using transit or micro-lensing events, and stellar luminosity variations. We propose to build a 1.5–2 m class three-reflections telescope, with 1–1.5 degree FOV, four times shorter than an equivalent Schmidt telescope, and providing a flat field without requiring a triplet- or quadruplet-lens corrector since its design is anastigmatic. We present the preliminary optical tests of such designs: MINITRUST 1 and 2 are two 45 cm identical prototypes based in France and Italy, and manufactured using active optics techniques.
© EAS, EDP Sciences, 2005
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