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21 September 2012 The GAIA photometric data processing
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Abstract
Gaia is an ESA mission which will measure the positions, distances, space motions, and many physical characteristics for one billion stars in our Galaxy and beyond. The satellite will have three instruments on board: the Astrometric Field for the astrometry; the Blue and Red Photometers for the low-resolution spectroscopy and the Radial Velocity Spectrometer which will allow measuring radial velocities. This paper will give an overview of the processing of the dispersed images for BP and RP: the data will be corrected for CCD related effects in the pre-processing, where also the sky background and the flux contamination from neighbouring sources will be removed; the data will be then internally calibrated to the same "mean instrument" and externally calibrated to obtain spectrum and flux in physical units, which will be stored in the final catalogue.
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Giorgia Busso, Francesca De Angeli, and Paolo Montegriffo "The GAIA photometric data processing", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 844242 (21 September 2012); https://doi.org/10.1117/12.925911
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