Gaia Data Release 2: The astrometric solution

@article{Lindegren2018GaiaDR,
  title={Gaia Data Release 2: The astrometric solution},
  author={L. Lindegren and J. Hern'andez and A. Bombrun and S. Klioner and U. Bastian and M. Ramos-lerate and A. D. Torres and H. Steidelmuller and C. Stephenson and D. Hobbs and U. Lammers and M. Biermann and R. Geyer and T. Hilger and D. Michalik and U. Stampa and P. McMillan and J. Casta{\~n}eda and M. Clotet and G. Comoretto and M. Davidson and C. Fabricius and G. Gracia and N. Hambly and A. Hutton and A. Mora and J. Portell and F. V. Leeuwen and U. Abbas and A. Abreu and M. Altmann and A. Andrei and E. Anglada and L. Balaguer-N'unez and C. Barache and U. Becciani and S. Bertone and L. Bianchi and S. Bouquillon and G. Bourda and T. Brusemeister and B. Bucciarelli and D. Busonero and R. Buzzi and R. Cancelliere and T. Carlucci and P. Charlot and N. Cheek and M. Crosta and C. Crowley and J. Bruijne and F. Felice and R. Drimmel and P. Esquej and A. Fienga and E. Fraile and M. Gai and N. Garralda and J. J. Gonz{\'a}lez-Vidal and R. Guerra and M. Hauser and W. Hofmann and B. Holl and S. Jordan and M. Lattanzi and H. Lenhardt and S. Liao and E. Licata and T. Lister and W. Loffler and J. Marchant and J. Mart'in-Fleitas and R. Messineo and F. Mignard and R. Morbidelli and E. Poggio and A. Riva and N. Rowell and E. Salguero and M. Sarasso and E. Sciacca and H. Siddiqui and R. Smart and A. Spagna and I. Steele and F. Taris and J. Torra and A. V. Elteren and W. V. Reeven and A. Vecchiato},
  journal={Astronomy and Astrophysics},
  year={2018},
  volume={616},
  pages={1-25}
}
Context. Gaia Data Release 2 (Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational phase. Aims. We describe the input data, models, and processing used for the astrometric content of Gaia DR2, and the validation of these resultsperformed within the astrometry task. Methods. Some 320 billion centroid positions from the pre-processed astrometric… Expand
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