A&A Supplement series, Vol. 125, November I 1997, 551-556

Received October 14, 1996; accepted January 21, 1997

Sky coverage with the auxiliary telescopes Laser Guide Star tilt recovery technique

E. Marchetti and R. Ragazzoni

Send offprint request: E. Marchetti
  CISAS, vicolo dell'Osservatorio 5, I-35122 Padova, Italy e-mail: marchetti@astrpd.pd.astro.it
  Astronomical Observatory of Padova, vicolo dell'Osservatorio 5, I-35122 Padova, Italy e-mail: ragazzoni@astrpd.pd.astro.it

Abstract:

Auxiliary telescopes in the neighbourhoods of a main telescope equipped with an LGS can provide, in principle, full sky coverage. The auxiliary telescopes, however, should be able to move around in order to acquire a useful natural guide star (NGS), and to track the LGS, comoving with the scientific target. Detailed expressions and results of numerical simulations are given.

keywords: atmospheric effects -- methods: observational -- telescopes

• 1. Introduction
• 2. Limiting magnitude for the auxiliary telescopes
• 3. Path of the auxiliary telescopes
• 4. Ground occupation
• 5. Conclusions
• References