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 M. Altmann R. Andrae M. Audard 25 I. Bellas-Velidis K. Benson J. Berthier 26 R. Blomme 27 P. Burgess 18 G. Busso 18 B. Carry 28 A. Cellino 29 G. Clementini 30 M. Clotet O. Creevey 31 M. David J. de Ridder 23 L. Delchambre A. Dell’oro C. Ducourant 9 M. Fouesneau Y. Frémat 6 L. Galluccio 32 M. García-Torres J. González-Núñez J. González-Vidal E. Gosset 33 P. Guy 34 J. Halbwachs C. Hambly D. Harrison D. Hestroffer 35 T. Hodgkin A. Hutton Gérard Jasniewicz 36 A. Jean-Antoine-Piccolo S. Jordan 37 J. Korn A. Krone-Martins C. Lanza T. Lebzelter W. Löffler M. Manteiga M. Marrese J. Martín-Fleitas A. Moitinho 38 A. Mor K. Muinonen 39 J. Osinde E. Pancino 40 T. Pauwels 27 J. Petit 41 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 42 A. Abreu Aramburu S. Accart C. Aerts 43 G. Altavilla M. Álvarez R. Alvarez J. Alves R. Anderson E. Anglada Varela E. Antiche T. Antoja B. Arcay T. Astraatmadja 44 N. Bach 45 S. Baker L. Balaguer-Nunez 46 P. Balm C. Barata 47 D. Barbato F. Barblan S. Barklem D. Barrado 48 M. Barros M. Barstow 49 L. Bartholomé Muñoz J. Bassilana U. Becciani M. Bellazzini A. Berihuete Stefano Bertone L. Bianchi 50 O. Bienaymé 51 S. Blanco-Cuaresma 52 T. Boch C. Boeche R. Borrachero D. Bossini S. Bouquillon 7 A. Bragaglia L. Bramante M. Breddels A. Bressan 53 N. Brouillet 54 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 55 L. Casamiquela 9 M. Castellani 56 A. Castro-Ginard L. Chemin A. Chiavassa 36 G. Cocozza G. Costigan S. Cowell 18 F. Crifo 6 M. Crosta C. Crowley J. Cuypers 27 C. Dafonte Y. Damerdji 57 A. Dapergolas P. David P. de Laverny 1 F. de Luise 58 R. de March R. de Souza A. de Torres J. Debosscher 59 E. Del Pozo M. Delbò 1 A. Delgado 60 H. Delgado S. Diakite 61 C. Diener E. Distefano C. Dolding P. Drazinos J. Duran 62 B. Edvardsson 63 H. Enke K. Eriksson 63 P. Esquej G. Eynard Bontemps C. Fabre 64 M. Fabrizio 65 S. Faigler J. Falcão M. Farràs Casas L. Federici 66 G. Fedorets P. Fernique 67 F. Figueras 68 F. Filippi 69 K. Findeisen A. Fonti E. Fraile M. Fraser 70 B. Frézouls M. Gai 29 S. Galleti D. Garabato F. García-Sedano A. Garofalo 71 N. Garralda A. Gavel P. Gavras J. Gerssen P. Giacobbe G. Gilmore S. Girona G. Giuffrida F. Glass M. Gomes M. Granvik A. Gueguen 72 A. Guerrier 73 J. Guiraud 74 R. Gutié R. Haigron 6 D. Hatzidimitriou 75 M. Hauser M. Haywood 6 U. Heiter 63 A. Helmi 76 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 77 K. Kolenberg M. Kontizas E. Kontizas S. Koposov G. Kordopatis 1 Z. Kostrzewa-Rutkowska P. Koubsky A. Lanza Y. Lasne 78 J. Lavigne Y. Le Fustec C. Le Poncin-Lafitte 79 Y. Lebreton 6, 80 S. Leccia N. Leclerc 81 I. Lecoeur-Taibi H. Lenhardt F. Leroux S. Liao 82 E. Licata H. Lindstrøm T. Lister E. Livanou A. Lobel 27 M. López S. Managau G. Mann 83 G. Mantelet 84 O. Marchal 85 J. Marchant 86 M. Marconi S. Marinoni G. Marschalkó J. Marshall M. Martino G. Marton 87 N. Mary 88 D. Massari G. Matijevič T. Mazeh 89 J. Mcmillan S. Messina R. Millar 90 D. Molina R. Molinaro 91 L. Molnar 92 P. Montegriffo R. Mor R. Morbidelli T. Morel D. Morris 93 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 94 H. Palacin L. Palaversa A. Panahi M. Pawlak M. Piersimoni F. Pineau 95 E. Plachy G. Plum E. Poggio E. Poujoulet A. Prša L. Pulone E. Racero S. Ragaini N. Rambaux 35 S. Regibo C. Reyle 96 F. Riclet V. Ripepi 97 A. Riva 98 A. Rivard G. Rixon 18 T. Roegiers M. Roelens 99 M. Romero-Gomez 100 N. Rowell F. Royer 6 L. Ruiz-Dern 73 G. Sadowski 101 T. Sagristà Sellés J. Sahlmann J. Salgado 102 E. Salguero N. Sanna T. Santana-Ros 103 M. Sarasso H. Savietto M. Schultheis 96 E. Sciacca M. Segol 104 C. Segovia D. Segransan 52 C. Shih 105 L. Siltala A. Silva R. Smart 29 W. Smith E. Solano 106 F. Solitro R. Sordo S. Soria Nieto J. Souchay 7 A. Spagna F. Spoto 107 U. Stampa A. Steele 108 C. Stephenson H. Stoev F. Suess J. Surdej 109 L. Szabados 110 E. Szegedi-Elek D. Tapiador F. Taris G. Tauran M. Taylor R. Teixeira 111 D. Terrett P. Teyssandier 7 W. Thuillot 35 A. Titarenko F. Torra Clotet C. Turon 6 A. Ulla E. Utrilla S. Uzzi M. Vaillant 112 G. Valentini 113 V. Valette 114 A. Van Elteren E. Van Hemelryck M. Van Leeuwen P. Charlot 9 M. Vaschetto A. Vecchiato 115 J. Veljanoski Y. Viala 6 D. Vicente 116 S. Vogt 117 C. Von Essen H. Voss V. Votruba S. Voutsinas G. Walmsley M. Weiler 118 O. Wertz T. Wevers 119 Ł. Wyrzykowski A. Yoldas 18 M. Žerjal H. Ziaeepour 120 J. Zorec 121 S. Zschocke 122 S. Zucker 123 C. Zurbach 124 T. Zwitter
9 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
54 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
85 PSPM - Probabilités, statistique, physique mathématique
ICJ - Institut Camille Jordan [Villeurbanne]
114 Equipe EES
EBI - Ecologie et biologie des interactions
115 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.
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https://hal.archives-ouvertes.fr/hal-01867238
Contributor : Marie-Paule Pomies <>
Submitted on : Tuesday, September 4, 2018 - 10:33:54 AM
Last modification on : Thursday, April 25, 2019 - 4:16:33 PM

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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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