Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
- Creators
- Lindegren, L.
- Lammers, U.
- Bastian, U.
- Hernández, J.
- Klioner, S.
- Hobbs, D.
- Bombrun, A.
- Michalik, D.
- Ramos-Lerate, M.
- Butkevich, A.
- Comoretto, G.
- Joliet, E.
- Holl, B.
- Hutton, A.
- Parsons, P.
- Steidelmüller, H.
- Abbas, U.
- Altmann, M.
- Andrei, A.
- Anton, S.
- Bach, N.
- Barache, C.
- Becciani, U.
- Berthier, J.
- Bianchi, L.
- Biermann, M.
- Bouquillon, S.
- Bourda, G.
- Brüsemeister, T.
- Bucciarelli, B.
- Busonero, D.
- Carlucci, T.
- Castañeda, J.
- Charlot, P.
- Clotet, M.
- Crosta, M.
- Davidson, M.
- de Felice, F.
- Drimmel, R.
- Fabricius, C.
- Fienga, A.
- Figueras, F.
- Fraile, E.
- Gai, M.
- Garralda, N.
- Geyer, R.
- González-Vidal, J. J.
- Guerra, R.
- Hambly, N. C.
- Hauser, M.
- Jordan, S.
- Lattanzi, M. G.
- Lenhardt, H.
- Liao, S.
- Löffler, W.
- Mcmillan, P. J.
- Mignard, F.
- Mora, A.
- Morbidelli, R.
- Portell, J.
- Riva, A.
- Sarasso, M.
- Serraller, I.
- Siddiqui, H.
- Smart, R.
- Spagna, A.
- Stampa, U.
- Steele, I.
- Taris, F.
- Torra, J.
- van Reeven, W.
- Vecchiato, A.
- Zschocke, S.
- de Bruijne, J.
- Gracia, G.
- Raison, F.
- Lister, T.
- Marchant, J.
- Messineo, R.
- Soffel, M.
- Osorio, J.
- de Torres, A.
- O'Mullane, W.
- Others:
- Agence Spatiale Européenne = European Space Agency (ESA)
- Zentrum für astronomie ; Universität Heidelberg [Heidelberg]
- Solvay (France) ; Solvay (France)
- Université Grenoble Alpes - UFR Langage, lettres et arts du spectacle, information et communication - Dpt Lettres et arts du spectacle (UGA UFR LLASIC LAS) ; Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Heckscher-Klinikum ; Heckscher-Klinikum
- AUTRES
- Systèmes de Référence Temps Espace (SYRTE) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
- ARHEOINVEST ; Universitatea Alexandru Ioan Cuza [Lasi]
- Department of Medicine ; Icahn School of Medicine at Mount Sinai [New York] (MSSM)
- Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Department of Clinical Medicine ; University of Bergen (UiB)
- Department of nuclear medicine ; Haukeland University Hospital ; University of Bergen (UiB)-University of Bergen (UiB)
- M2A 2016 ; Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB) ; Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Open University of Israël
- Nelson Mandela University [Port Elizabeth]
- Géoazur (GEOAZUR 7329) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])
- Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Astrometry ; INAF - Osservatorio Astrofisico di Torino (OATo) ; Istituto Nazionale di Astrofisica (INAF)-Istituto Nazionale di Astrofisica (INAF)
- Laboratorio de Inmunologıa y Virologıa ; Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolas de los Garza
- Laboratório de Ictiologia e Pesca ; Universidade Federal de Rondônia [Brésil] (UNIR)
- Department of Pathology and Cell Biology ; Columbia University [New York]
- Chinese Academy of Sciences [Beijing] (CAS)
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- Department of Computer Architecture and Computer Technology ; Universidad de Granada = University of Granada (UGR)
- Laboratoire Génome et Informatique ; Centre National de la Recherche Scientifique (CNRS)
- Human Cancer Genetics Program ; Comprehensive Cancer Center-College of Medicine and Public Health [Colombus]
- INAF - Osservatorio Astrofisico di Torino (OATo) ; Istituto Nazionale di Astrofisica (INAF)
- Lohrmann Observatory ; Technische Universität Dresden = Dresden University of Technology (TU Dresden)
- Gastroenterology and Hepatology ; Academic Medical Center - Academisch Medisch Centrum [Amsterdam] (AMC) ; University of Amsterdam [Amsterdam] (UvA)-University of Amsterdam [Amsterdam] (UvA)
- British Geological Survey (BGS)
- University of Las Palmas de Gran Canaria (ULPGC)
Description
Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months of its operational phase. We give a brief overview of the astrometric content of the data release and of the model assumptions, data processing, and validation of the results. For stars in common with the Hipparcos and Tycho-2 catalogues, complete astrometric single-star solutions are obtained by incorporating positional information from the earlier catalogues. For other stars only their positions are obtained by neglecting their proper motions and parallaxes. The results are validated by an analysis of the residuals, through special validation runs, and by comparison with external data. Results. For about two million of the brighter stars (down to magnitude ~11.5) we obtain positions, parallaxes, and proper motions to Hipparcos-type precision or better. For these stars, systematic errors depending e.g. on position and colour are at a level of 0.3 milliarcsecond (mas). For the remaining stars we obtain positions at epoch J2015.0 accurate to ~10 mas. Positions and proper motions are given in a reference frame that is aligned with the International Celestial Reference Frame (ICRF) to better than 0.1 mas at epoch J2015.0, and non-rotating with respect to ICRF to within 0.03 mas/yr. The Hipparcos reference frame is found to rotate with respect to the Gaia DR1 frame at a rate of 0.24 mas/yr. Based on less than a quarter of the nominal mission length and on very provisional and incomplete calibrations, the quality and completeness of the astrometric data in Gaia DR1 are far from what is expected for the final mission products. The results nevertheless represent a huge improvement in the available fundamental stellar data and practical definition of the optical reference frame.
Abstract
International audience
Additional details
- URL
- https://hal.science/hal-01366639
- URN
- urn:oai:HAL:hal-01366639v1
- Origin repository
- UNICA