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Proceedings Paper

A 64 Mpixel camera for the Wendelstein Fraunhofer Telescope Nasmyth wide-field port: WWFI
Author(s): Claus Gössl; Ralf Bender; Frank Grupp; Ulrich Hopp; Florian Lang-Bardl; Wolfgang Mitsch; Werner Altmann; Ann Ayres; Scott Clark; Michael Hartl; Dirk Kampf; Gary Sims; Hans Thiele; Kevin Toerne
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Paper Abstract

Ludwig-Maximilians-Universit¨at M¨unchen operates an astrophysical observatory on the summit of Mt. Wendelstein1 which will be equipped with a modern 2m-class, robotic telescope.2 One Nasmyth port of the new Fraunhofer telescope is designed to sustain the excellent (< 0.8" median) seeing of the site [1, Fig. 1] over a FOV of 0.2 deg2 utilizing three-element transmissive field corrector optics for optical wavebands. It will be equipped with a camera built around a customized 64 MPixel Mosaic (Spectral Instruments, 4 × (4k)2 15μm e2v CCDs). TheWendelsteinWide Field Imager has two filter wheels with eight slots each (SDSS3 [ugriz] + eight still free) as well as two off-axis guiding units (two FLI Microline with 2k Fairchild CCDs on differential focus stages). A Bonn Shutter4 ensures high precision photometric exposures. An option to either insert a low dispersion grating (for field spectroscopy) or support a wave front sensor probe allows for further expansion of the camera. EMI-safe housing has to overcome the emission of a close by 0.5MW radio station. Special care has been taken to design a very low ghost budget of the overall system to allow for low-surface brightness applications (e.g. weak lensing surveys).

Paper Details

Date Published: 19 July 2010
PDF: 8 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773535 (19 July 2010); doi: 10.1117/12.856432
Show Author Affiliations
Claus Gössl, Univ.-Sternwarte München (Germany)
Ralf Bender, Univ.-Sternwarte München (Germany)
Max-Planck-Institut für extraterrestrische Physik (Germany)
Frank Grupp, Max-Planck-Institut für extraterrestrische Physik (Germany)
Ulrich Hopp, Univ.-Sternwarte München (Germany)
Max-Planck-Institut für extraterrestrische Physik (Germany)
Florian Lang-Bardl, Univ.-Sternwarte München (Germany)
Wolfgang Mitsch, Univ.-Sternwarte München (Germany)
Werner Altmann, Konstruktionsubüro Werner Altmann (Germany)
Ann Ayres, Spectral Instruments, Inc. (United States)
Scott Clark, Spectral Instruments, Inc. (United States)
Michael Hartl, Kayser-Threde GmbH (Germany)
Dirk Kampf, Kayser-Threde GmbH (Germany)
Gary Sims, Spectral Instruments, Inc. (United States)
Hans Thiele, Kayser-Threde GmbH (Germany)
Kevin Toerne, Spectral Instruments, Inc. (United States)

Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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