Gaia Data Release 2. The celestial reference frame (Gaia-CRF2)

Collaboration Gaia F. Mignard 1 S. Klioner L. Lindegren J. Hernandez 2 U. Bastian 3 A. Bombrun 4 D. Hobbs U. Lammers D. Michalik M. Ramos-Lerate M. Biermann J. Fernández-Hernández R. Geyer T. Hilger H. Siddiqui 5 H. Steidelmüller C. Babusiaux 6 C. Barache 7 S. Lambert 8 H. Andrei G. Bourda 9 A. Brown A. Vallenari T. Prusti 10 J. De Bruijne C. Bailer-Jones D. Evans L. Eyer 11 F. Jansen 12 C. Jordi X. Luri 13 C. Panem D. Pourbaix 14 S. Randich P. Sartoretti 6 C. Soubiran 9 F. Van Leeuwen A. Walton F. Arenou 6 M. Cropper R. Drimmel D. Katz 6 M. Lattanzi 15 J. Bakker 16 C. Cacciari 17 J. Castañeda L. Chaoul N. Cheek F. De Angeli 18 C. Fabricius 19 R. Guerra 20 B. Holl 21 E. Masana 22 R. Messineo N. Mowlavi K. Nienartowicz P. Panuzzo 23 J. Portell M. Riello M. Seabroke P. Tanga 1 F. Thevenin 1 G. Gracia-Abril G. Comoretto 24 M. Garcia-Reinaldos D. Teyssier 25 M. Altmann R. Andrae M. Audard 26 I. Bellas-Velidis K. Benson J. Berthier 27 R. Blomme 28 P. Burgess 18 G. Busso 18 B. Carry 29 A. Cellino 30 G. Clementini 31 M. Clotet O. Creevey 32 M. David J. De Ridder 23 L. Delchambre A. Dell’oro C. Ducourant 9 M. Fouesneau Y. Frémat 6 L. Galluccio 33 M. García-Torres J. González-Núñez J. González-Vidal E. Gosset 34 P. Guy 35 J. Halbwachs C. Hambly D. Harrison D. Hestroffer 36 T. Hodgkin A. Hutton G. Jasniewicz 37 A. Jean-Antoine-Piccolo S. Jordan 38 J. Korn A. Krone-Martins C. Lanza T. Lebzelter W. Löffler M. Manteiga M. Marrese J. Martín-Fleitas A. Moitinho 39 A. Mor K. Muinonen 40 J. Osinde E. Pancino 41 T. Pauwels 28 J. Petit 42 A. Recio-Blanco 1 J. Richards L. Rimoldini C. Robin M. Sarro C. Siopis M. Smith A. Sozzetti M. Süveges J. Torra W. Van Reeven U. Abbas 43 A. Abreu Aramburu S. Accart C. Aerts 44 G. Altavilla M. Álvarez R. Alvarez J. Alves R. Anderson E. Anglada Varela E. Antiche T. Antoja B. Arcay T. Astraatmadja 45 N. Bach 46 S. Baker L. Balaguer-Nunez 47 P. Balm C. Barata 48 D. Barbato F. Barblan S. Barklem D. Barrado 49 M. Barros M. Barstow 50 L. Bartholomé Muñoz J. Bassilana U. Becciani M. Bellazzini A. Berihuete S. Bertone L. Bianchi 51 O. Bienaymé 52 S. Blanco-Cuaresma 53 T. Boch C. Boeche R. Borrachero D. Bossini S. Bouquillon 7 A. Bragaglia L. Bramante M. Breddels A. Bressan 54 N. Brouillet 55 T. Brüsemeister E. Brugaletta B. Bucciarelli A. Burlacu D. Busonero A. Butkevich R. Buzzi E. Caffau 6 R. Cancelliere G. Cannizzaro T. Cantat-Gaudin R. Carballo T. Carlucci 7 J. Carrasco 56 L. Casamiquela 9 M. Castellani 57 A. Castro-Ginard L. Chemin A. Chiavassa 37 G. Cocozza G. Costigan S. Cowell 18 F. Crifo 6 M. Crosta C. Crowley 58 J. Cuypers 28 C. Dafonte Y. Damerdji 59 A. Dapergolas P. David P. De Laverny 1 F. De Luise 60 R. De March R. De Souza A. De Torres J. Debosscher 61 E. Del Pozo M. Delbò 1 A. Delgado 62 H. Delgado S. Diakite 63 C. Diener E. Distefano C. Dolding P. Drazinos J. Duran 64 B. Edvardsson 65 H. Enke K. Eriksson 65 P. Esquej G. Eynard Bontemps C. Fabre 66 M. Fabrizio 67 S. Faigler J. Falcão M. Farràs Casas L. Federici 68 G. Fedorets P. Fernique 69 F. Figueras 70 F. Filippi 71 K. Findeisen A. Fonti E. Fraile M. Fraser 72 B. Frézouls M. Gai 30 S. Galleti D. Garabato F. García-Sedano A. Garofalo 73 N. Garralda A. Gavel P. Gavras J. Gerssen P. Giacobbe G. Gilmore S. Girona G. Giuffrida F. Glass M. Gomes M. Granvik A. Gueguen 74 A. Guerrier 75 J. Guiraud 76 R. Gutié R. Haigron 6 D. Hatzidimitriou 77 M. Hauser M. Haywood 6 U. Heiter 65 A. Helmi 78 J. Heu W. Hofmann G. Holland H. Huckle A. Hypki V. Icardi K. Janßen G. Jevardat de Fombelle G. Jonker A. Juhasz 18 F. Julbe A. Karampelas A. Kewley J. Klar A. Kochoska R. Kohley 79 K. Kolenberg M. Kontizas E. Kontizas S. Koposov G. Kordopatis 1 Z. Kostrzewa-Rutkowska P. Koubsky A. Lanza Y. Lasne 80 J. Lavigne Y. Le Fustec C. Le Poncin-Lafitte 81 Y. Lebreton 6 S. Leccia N. Leclerc 82 I. Lecoeur-Taibi H. Lenhardt F. Leroux S. Liao 83 E. Licata H. Lindstrøm T. Lister E. Livanou A. Lobel 28 M. López S. Managau G. Mann 84 G. Mantelet 85 O. Marchal 86 J. Marchant 87 M. Marconi S. Marinoni G. Marschalkó J. Marshall M. Martino G. Marton 88 N. Mary 89 D. Massari G. Matijevič T. Mazeh 90 J. Mcmillan S. Messina R. Millar 91 D. Molina R. Molinaro 92 L. Molnar 93 P. Montegriffo R. Mor R. Morbidelli T. Morel D. Morris 94 A. Mulone T. Muraveva I. Musella G. Nelemans L. Nicastro L. Noval W. O’mullane C. Ordenovic 1 D. Ordóñez-Blanco P. Osborne C. Pagani I. Pagano F. Pailler 95 H. Palacin L. Palaversa A. Panahi M. Pawlak M. Piersimoni F. Pineau 96 E. Plachy G. Plum E. Poggio E. Poujoulet A. Prša L. Pulone E. Racero S. Ragaini N. Rambaux 36 S. Regibo C. Reyle 97 F. Riclet V. Ripepi 98 A. Riva 99 A. Rivard G. Rixon 18 T. Roegiers M. Roelens 100 M. Romero-Gomez 101 N. Rowell F. Royer 6 L. Ruiz-Dern 75 G. Sadowski 102 T. Sagristà Sellés J. Sahlmann J. Salgado 103 E. Salguero N. Sanna T. Santana-Ros 104 M. Sarasso H. Savietto M. Schultheis 97 E. Sciacca M. Segol 105 C. Segovia D. Segransan 53 C. Shih 106 L. Siltala A. Silva R. Smart 30 W. Smith E. Solano 107 F. Solitro R. Sordo S. Soria Nieto J. Souchay 7 A. Spagna F. Spoto 108 U. Stampa A. Steele 109 C. Stephenson H. Stoev F. Suess J. Surdej 110 L. Szabados 111 E. Szegedi-Elek D. Tapiador F. Taris G. Tauran M. Taylor R. Teixeira 112 D. Terrett P. Teyssandier 7 W. Thuillot 36 A. Titarenko F. Torra Clotet C. Turon 6 A. Ulla E. Utrilla S. Uzzi M. Vaillant 113 G. Valentini 114 V. Valette 115 A. Van Elteren E. Van Hemelryck M. Van Leeuwen P. Charlot 9 M. Vaschetto A. Vecchiato 116 J. Veljanoski Y. Viala 6 D. Vicente 117 S. Vogt 118 C. Von Essen H. Voss V. Votruba S. Voutsinas G. Walmsley M. Weiler 119 O. Wertz T. Wevers 120 Ł. Wyrzykowski A. Yoldas 18 M. Žerjal H. Ziaeepour 121 J. Zorec 122 S. Zschocke 123 S. Zucker 124 C. Zurbach 125 T. Zwitter
9 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
55 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
115 Equipe EES
EBI - Ecologie et biologie des interactions
116 Astrometry
OATo - INAF - Osservatorio Astrofisico di Torino
Abstract : Context. The second release of Gaia data (Gaia DR2) contains the astrometric parameters for more than half a million quasars. This set defines a kinematically non-rotating reference frame in the optical domain. A subset of these quasars have accurate VLBI positions that allow the axes of the reference frame to be aligned with the International Celestial Reference System (ICRF) radio frame. Aims: We describe the astrometric and photometric properties of the quasars that were selected to represent the celestial reference frame of Gaia DR2 (Gaia-CRF2), and to compare the optical and radio positions for sources with accurate VLBI positions. Methods: Descriptive statistics are used to characterise the overall properties of the quasar sample. Residual rotation and orientation errors and large-scale systematics are quantified by means of expansions in vector spherical harmonics. Positional differences are calculated relative to a prototype version of the forthcoming ICRF3. Results: Gaia-CRF2 consists of the positions of a sample of 556 869 sources in Gaia DR2, obtained from a positional cross-match with the ICRF3-prototype and AllWISE AGN catalogues. The sample constitutes a clean, dense, and homogeneous set of extragalactic point sources in the magnitude range G ≃ 16 to 21 mag with accurately known optical positions. The median positional uncertainty is 0.12 mas for G < 18 mag and 0.5 mas at G = mag. Large-scale systematics are estimated to be in the range 20 to 30 μas. The accuracy claims are supported by the parallaxes and proper motions of the quasars in Gaia DR2. The optical positions for a subset of 2820 sources in common with the ICRF3-prototype show very good overall agreement with the radio positions, but several tens of sources have significantly discrepant positions. Conclusions: Based on less than 40% of the data expected from the nominal Gaia mission, Gaia-CRF2 is the first realisation of a non-rotating global optical reference frame that meets the ICRS prescriptions, meaning that it is built only on extragalactic sources. Its accuracy matches the current radio frame of the ICRF, but the density of sources in all parts of the sky is much higher, except along the Galactic equator.
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A14. 〈10.1051/0004-6361/201832916〉
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https://hal.archives-ouvertes.fr/hal-01867238
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 4 septembre 2018 - 10:33:54
Dernière modification le : lundi 26 novembre 2018 - 17:20:02

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Collaboration Gaia, F. Mignard, S. Klioner, L. Lindegren, J. Hernandez, et al.. Gaia Data Release 2. The celestial reference frame (Gaia-CRF2). Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A14. 〈10.1051/0004-6361/201832916〉. 〈hal-01867238〉

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