Astrometric signal profile fitting for Gaia

@article{Gai2010AstrometricSP,
  title={Astrometric signal profile fitting for Gaia},
  author={Dr Mario Gai and Rossella Cancelliere and Deborah Busonero Istituto Nazionale di Astrofisica - Osser Torino and Pino Torinese and Torino and Italy. and Dipartimento di Informatica and Universita' di Torino},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={406},
  pages={2433-2444}
}
A tool for representation of the one-dimensional astrometric signal of Gaia is described and investigated in terms of fit discrepancy and astrometric performance with respect to the number of parameters required. The proposed basis function is based on the aberration free response of the ideal telescope and its derivatives, weighted by the source spectral distribution. The influence of relative position of the detector pixel array with respect to the optical image is analysed, as well as the… 
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