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Multi-Colour Photometry with GAIAof the Diffuse Sky Background

Published online by Cambridge University Press:  25 September 2002

O. Bienaymé ,
C. Turon ,
E. Høg  and
K. Mattila
E. Høg
Affiliation:
Copenhagen University Observatory, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
K. Mattila
Affiliation:
Observatory, P.O. Box 14, Taehtitorninmaki, University of Helsinki, 00014 Helsinki, Finland
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Abstract

The report discusses the possible multi-colour photometry of thediffuse sky surface with the Astro and Spectro telescopes of GAIA.The ordinary photometry of faint stars will give good results of thebackground for at least 500 million spots on the sky. Measurementfrom about 100 of these spots in a small area could be averaged toobtain a precision of about 0.5 S10 of GAIA medium-bandphotometry in each of the 5 million areas. It is concluded that GAIAmedium-band photometry is suited to tackle a whole range ofastrophysically interesting diffuse sky components. After modellingand subtracting the time-variable Zodiacal Light, GAIA could providemulti-wavelength all sky maps of the low galactic latitude DiffuseGalactic Light and the high latitude Galactic Cirrus Clouds. Possiblyalso the Extragalactic Background Light could be detected.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 2: GAIA: A European Space Project , 2002 , pp. 321 - 326
Copyright
© EAS, EDP Sciences, 2002

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