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A Dedicated 1-Meter Telescope for High Precision Astrometric Sky Mapping of Faint Stars

  • Christian de Vegt
  • Uwe Laux
  • Norbert Zacharias
Part of the Astrophysics and Space Science Library book series (ASSL, volume 287/8/9)

Abstract

Requirements for future, ground-based, global, astrometric surveys are discussed. A new generation of catadioptric telescopes for high precision astrometric catalog work is described. Results of design studies for modified Richter-Slevogt optical systems with apertures of 0.5 to 1.0-m and aperture ratios ~ f /4 are presented. It is shown that these systems can be made nearly diffraction-limited with a field size up to 3° diameter and very small third-order distortion (≤ 1.0 arcsec/deg3). Because of their compact design (tube length ≤ 0.5 f) these telescope systems are optimal for automatic and remote operation. An example 0.9-m instrument could map a hemisphere with 4-fold overlap to 21th magnitude in one year, providing 10-mas positional accuracy for stars in the 15 to 19 mag range. The proposed design is applicable for dedicated photometric telescopes as well.

astrometry survey telescope optics 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Christian de Vegt
    • 1
  • Uwe Laux
    • 2
  • Norbert Zacharias
    • 3
  1. 1.Hamburger SternwarteHamburgGermany
  2. 2.Karl-Schwarzschild-ObservatoriumTautenburgGermany
  3. 3.U.S. Naval ObservatoryWashington, D.C.USA

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