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Infrared and Submillimetre Observing Conditions on the Antarctic Plateau

Published online by Cambridge University Press:  05 March 2013

Marton G. Hidas ,
Michael G. Burton ,
Matthew A. Chamberlain  and
John W. V. Storey
Marton G. Hidas*
Affiliation:
School of Physics, University of New South Wales, NSW 2052, Australia
Michael G. Burton
Affiliation:
School of Physics, University of New South Wales, NSW 2052, Australia
Matthew A. Chamberlain
Affiliation:
School of Physics, University of New South Wales, NSW 2052, Australia
John W. V. Storey
Affiliation:
School of Physics, University of New South Wales, NSW 2052, Australia
*
mgh@roen.phys.unsw.edu.au
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Abstract

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The Antarctic Plateau provides the best terrestrial sites for infrared (IR) and submillimetre (sub-mm) astronomy. In this paper we examine the relative importance of temperature, aerosol content and precipitable water vapour to determine which parameters have the greatest influence on atmospheric transmission and sky brightness. We use the atmospheric modelling program MODTRAN to model the observed sky spectrum at the South Pole from the near-IR to the sub-mm. We find that temperature and aerosol content determine the quality of near-IR observing conditions, aerosol content is the determining factor in the mid-IR up to 20 μm, while at longer wavelengths, including the sub-mm, it is the water vapour content that matters. Finding a location where aerosol levels are minimised is a key constraint in determining the optimum site on the Antarctic Plateau for an IR observatory.

Keywords

site testingatmospheric effectsinfrared: general
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 17 , Issue 3 , 2000 , pp. 260 - 269
Copyright
Copyright © Astronomical Society of Australia 2000

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