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Proceedings Paper

Omega Prime: the wide-field near-infrared camera for the 3.5-m telescope of the Calar Alto Observatory
Author(s): Peter Bizenberger; Mark J. McCaughrean; Christoph Birk; Dave Thompson; Clemens Storz
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Paper Abstract

Omega Prime is a wide-field near-IR camera for the prime focus of the Calar Alto 3.5 m telescope in Spain. The detector is a 1024 X 1024 pixel HAWAII array made by Rockwell. The image scale is 0.4 arcsec/pixel, giving a field of view of 6.8 by 6.8 arcmin. In order to maximize the throughput, the optics were designed as a prime focus corrector with only three lenses. This simple design without a cold pupil provides an excellent image quality over the entire field of view. To reduce thermal background at wavelengths longer than 2.2 micrometers , Omega Prime has a series of cold internal baffles and an additional torodial mirror outside the dewar. This annular reflector causes detector pixels to 'see' mostly the cold interior of the camera. The camera has been in operation since May 1996 and has been used for a variety of scientific programs. Including a very deep K survey covering 1000 square arcmin to a 5 (sigma) limit for point-sources of 20.5 magnitude.

Paper Details

Date Published: 21 August 1998
PDF: 8 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317219
Show Author Affiliations
Peter Bizenberger, Max-Planck-Institut fuer Astronomie (Germany)
Mark J. McCaughrean, Astrophysikalisches Institut/Potsdam (Germany)
Christoph Birk, Observatories of the Carnegie Institution of Washington (United States)
Dave Thompson, Max-Planck-Institut fuer Astronomie (Germany)
Clemens Storz, Max-Planck-Institut fuer Astronomie (Germany)

Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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