U
U. Lammers
Researcher at European Space Agency
Publications - 14
Citations - 7117
U. Lammers is an academic researcher from European Space Agency. The author has contributed to research in topics: Astrometry & Parallax. The author has an hindex of 11, co-authored 14 publications receiving 5481 citations. Previous affiliations of U. Lammers include Lund University.
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Journal ArticleDOI
Gaia Data Release 1 Summary of the astrometric, photometric, and survey properties
Anthony G. A. Brown,Antonella Vallenari,T. Prusti,J. H. J. de Bruijne,Francois Mignard,R. Drimmel,C. Babusiaux,Coryn A. L. Bailer-Jones,Ulrich Bastian,M. Biermann,D. W. Evans,L. Eyer,F. Jansen,Carme Jordi,D. Katz,Sergei A. Klioner,U. Lammers,Lennart Lindegren,Xavier Luri,William O'Mullane,C. Panem,Dimitri Pourbaix,Sofia Randich,P. Sartoretti,H. I. Siddiqui,Caroline Soubiran,V. Valette,F. van Leeuwen,Nicholas A. Walton,Conny Aerts,Frédéric Arenou,Mark Cropper,Erik Høg,M. G. Lattanzi,Eva K. Grebel,Andrew D. Holland,C. Huc,X. Passot,Michael Perryman,L. Bramante,C. Cacciari,J. Castañeda,L. Chaoul,N. Cheek,F. De Angeli,C. Fabricius,Raphael Guerra,Jonay I. González Hernández,A. Jean-Antoine-Piccolo,E. Masana,R. Messineo,Nami Mowlavi,Krzysztof Nienartowicz,D. Ordóñez-Blanco,P. Panuzzo,Jordi Portell,P. J. Richards,M. Riello,George M. Seabroke,Paolo Tanga,F. Thévenin,J. Torra,S. G. Els,G. Gracia-Abril,G. Comoretto,M. Garcia-Reinaldos,T. Lock,E. Mercier,Martin Altmann,Rene Andrae,Tri L. Astraatmadja,I. Bellas-Velidis,K. Benson,J. Berthier,R. Blomme,G. Busso,Benoit Carry,Alberto Cellino,G. Clementini,S. Cowell,O. Creevey,J. Cuypers,Michael Davidson,J. De Ridder,A. de Torres,Ludovic Delchambre,A. Dell'Oro,C. Ducourant,Yves Fremat,Miguel García-Torres,Eric Gosset,J.-L. Halbwachs,Nigel Hambly,D. L. Harrison,M. Hauser,Daniel Hestroffer,S. T. Hodgkin,H. Huckle,A. Hutton,Gérard Jasniewicz,S. Jordan,M. Kontizas,Andreas Korn,A. C. Lanzafame,Minia Manteiga,André Moitinho,Karri Muinonen,J. Osinde,Elena Pancino,T. Pauwels,J.-M. Petit,Alejandra Recio-Blanco,Annie C. Robin,L. M. Sarro,C. Siopis,M. J. S. Smith,K. W. Smith,Alessandro Sozzetti,William Thuillot,W. van Reeven,Y. Viala,Ummi Abbas,A. Abreu Aramburu,S. Accart,J.J. Aguado,P. M. Allan,Walter Allasia,G. Altavilla,M. A. Álvarez,João Alves,Richard I. Anderson,Alexandre Humberto Andrei,E. Anglada Varela,E. Antiche,Teresa Antoja,Sonia Anton,Bernardino Arcay,N. Bach,S. G. Baker,L. Balaguer-Núñez,C. Barache,C. Barata,A. Barbier,F. Barblan,D. Barrado y Navascues,M. Barros,M. A. Barstow,Ugo Becciani,Michele Bellazzini,A. Bello García,Vasily Belokurov,P. Bendjoya,A. Berihuete,Luciana Bianchi,Olivier Bienaymé,F. Billebaud,Nadejda Blagorodnova,S. Blanco-Cuaresma,T. Boch,Alex Bombrun,R. Borrachero,S. Bouquillon,G. Bourda,H. Bouy,Angela Bragaglia,Maarten A. Breddels,N. Brouillet,T. Brüsemeister,B. Bucciarelli,P. Burgess,R. Burgon,A. Burlacu,Deborah Busonero,R. Buzzi,Elisabetta Caffau,J. Cambras,H. Campbell,Rossella Cancelliere,Tristan Cantat-Gaudin,T. Carlucci,J. M. Carrasco,Marco Castellani,P. Charlot,J. Charnas,A. Chiavassa,M. Clotet,G. Cocozza,Ross Collins,G. Costigan,F. Crifo,Nicholas Cross,Mariateresa Crosta,C. Crowley,Carlos Dafonte,Yassine Damerdji,A. Dapergolas,P. David,M. David,P. De Cat,F. de Felice,P. de Laverny,F. De Luise,R. De March,D. de Martino,R. E. de Souza,Jonas Debosscher,E. del Pozo,Marco Delbo,A. Delgado,H. E. Delgado,P. Di Matteo,S. Diakite,E. Distefano,C. Dolding,S. dos Anjos,P. Drazinos,J. Durán,Y. Dzigan,Bengt Edvardsson,H. Enke,Nick Evans,G. Eynard Bontemps,C. Fabre,M. Fabrizio,Simchon Faigler,A. J. Falcão,M. Farràs Casas,L. Federici,Grigori Fedorets,J. Fernández-Hernández,P. Fernique,Agnes Fienga,F. Figueras,F. Filippi,K. Findeisen,A. Fonti,Morgan Fouesneau,E. Fraile,Morgan Fraser,J. Fuchs,Mario Gai,S. Galleti,Laurent Galluccio,D. Garabato,F. García-Sedano,A. Garofalo,N. Garralda,P. Gavras,J. Gerssen,R. Geyer,Gerard Gilmore,S. Girona,G. Giuffrida,M. Gomes,Ana González-Marcos,J. González-Núñez,J.J. González-Vidal,Mikael Granvik,A. Guerrier,Patrick Guillout,J. Guiraud,A. Gúrpide,R. Gutiérrez-Sánchez,Leanne P. Guy,R. Haigron,Despina Hatzidimitriou,M. Haywood,Ulrike Heiter,Amina Helmi,David Hobbs,W. Hofmann,B. Holl,G. Holland,Julie Ann Hunt,A. Hypki,V. Icardi,M. Irwin,G. Jevardat de Fombelle,Paula Jofre,P. G. Jonker,Alain Jorissen,F. Julbe,A. Karampelas,A. Kochoska,R. Kohley,Katrien Kolenberg,E. Kontizas,Sergey E. Koposov,Georges Kordopatis,P. Koubsky,Alberto Krone-Martins,Maria Kudryashova,I. Kull,R. K. Bachchan,F. Lacoste-Seris,Antonino F. Lanza,J.-B. Lavigne,C. Le Poncin-Lafitte,Yveline Lebreton,Thomas Lebzelter,S. Leccia,N. Leclerc,Isabelle Lecoeur-Taïbi,V. Lemaitre,H. Lenhardt,F. Leroux,Shilong Liao,E. Licata,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,A. Lobel,W. Löffler,M. López,D. Lorenz,I. MacDonald,T. Magalhães Fernandes,S. Managau,Robert G. Mann,G. Mantelet,O. Marchal,Jon Marchant,Marcella Marconi,S. Marinoni,P. M. Marrese,G. Marschalkó,D. J. Marshall,J. M. Martín-Fleitas,Mario Di Martino,Nicolas Mary,G. Matijevič,Tsevi Mazeh,Paul J. McMillan,S. Messina,D. Michalik,N.R. Millar,B. M. H. Miranda,D. Molina,Roberto Molinaro,M. Molinaro,L. Molnár,M. Moniez,P. Montegriffo,R. Mor,A. Mora,R. Morbidelli,Thierry Morel,Stephan Morgenthaler,D. Morris,A.F. Mulone,Tatiana Muraveva,Ilaria Musella,J. Narbonne,Gijs Nelemans,Luciano Nicastro,L. Noval,C. Ordénovic,Joaquín Ordieres-Meré,P. Osborne,C. Pagani,I. Pagano,F. Pailler,H. Palacin,L. Palaversa,P. Parsons,M. Pecoraro,R. Pedrosa,H. Pentikäinen,B. Pichon,A. M. Piersimoni,F.-X. Pineau,E. Plachy,G. Plum,E. Poujoulet,A. Prša,L. Pulone,S. Ragaini,S. Rago,Nicolas Rambaux,M. Ramos-Lerate,Piero Ranalli,Gregor Rauw,A. Read,S. Regibo,Céline Reylé,Rita A. Ribeiro,L. Rimoldini,Vincenzo Ripepi,A. Riva,G. Rixon,M. Roelens,M. Romero-Gómez,Nicholas Rowell,F. Royer,L. Ruiz-Dern,G. Sadowski,T. Sagristà Sellés,Johannes Sahlmann,Jesus Salgado,E. Salguero,M. Sarasso,H. Savietto,Mathias Schultheis,Eva Sciacca,M. Segol,J. C. Segovia,D. Segransan,I.-C. Shih,Riccardo Smareglia,Richard L. Smart,E. Solano,F. Solitro,R. Sordo,Sonia Nieto,J. Souchay,Alessandro Spagna,Federica Spoto,U. Stampa,Iain A. Steele,H. Steidelmüller,C. A. Stephenson,H. Stoev,F. F. Suess,M. Süveges,Jean Surdej,Laszlo Szabados,E. Szegedi-Elek,D. Tapiador,Francois Taris,G. Tauran,Mark Taylor,R. Teixeira,D. Terrett,Brandon Tingley,Scott Trager,C. Turon,Ana Ulla,E. Utrilla,G. Valentini,A. van Elteren,E. Van Hemelryck,M. van Leeuwen,M. Varadi,Alberto Vecchiato,Jovan Veljanoski,T. Via,D. Vicente,Steven S. Vogt,H. Voss,V. Votruba,S. Voutsinas,G. Walmsley,M. Weiler,K. Weingrill,Thomas Wevers,Łukasz Wyrzykowski,A. Yoldas,M. Žerjal,Shay Zucker,C. Zurbach,T. Zwitter,A. Alecu,M. Allen,C. Allende Prieto,António Amorim,Guillem Anglada-Escudé,V. Arsenijevic,S. Azaz,P. Balm,Mattias Beck,H. H. Bernstein,Lionel Bigot,A. Bijaoui,C. Blasco,M. Bonfigli,Giuseppe Bono,Steve Boudreault,Alessandro Bressan,Sally Brown,P.-M. Brunet,P. Bunclark,R. Buonanno,A. G. Butkevich,C. Carret,C. Carrion,L. Chemin,F. Chéreau,Leonardo Corcione,E. Darmigny,K. S. de Boer,P. de Teodoro,P. T. de Zeeuw,C. Delle Luche,Catherine Dominguès,P. Dubath,F. Fodor,B. Frézouls,A. Fries,D. Fustes,D. Fyfe,E. Gallardo,J. Gallegos,D. Gardiol,M. Gebran,A. Gomboc,A. E. Gomez,E. Grux,A. Gueguen,A. Heyrovsky,J. Hoar,G. Iannicola,Y. Isasi Parache,A.-M. Janotto,E. Joliet,A. Jonckheere,R. Keil,Dae-Won Kim,P. Klagyivik,Joakim Klar,J. Knude,Oleg Kochukhov,I. Kolka,J. Kos,A. Kutka,Valéry Lainey,D. LeBouquin,C. Liu,Davide Loreggia,Valeri V. Makarov,M. G. Marseille,Christophe Martayan,O. Martinez-Rubi,B. Massart,F. Meynadier,S. Mignot,Ulisse Munari,A.-T. Nguyen,Thomas Nordlander,P. Ocvirk,K. S. O'Flaherty,A. Olias Sanz,P. Ortiz,J. Osorio,Dagmara Oszkiewicz,A. Ouzounis,M. Palmer,P. Park,E. Pasquato,C. Peltzer,J. Peralta,F. Péturaud,T. Pieniluoma,E. Pigozzi,J. Poels,G. Prat,T. Prod'homme,F. Raison,José Manuel Rebordão,D. Risquez,B. Rocca-Volmerange,Stefan Rosén,M. I. Ruiz-Fuertes,Federico Russo,Steven Sembay,I. Serraller Vizcaino,A. Short,A. Siebert,H. Silva,D. Sinachopoulos,E. Slezak,M. Soffel,D. Sosnowska,V. Straižys,M. ter Linden,Dirk Terrell,Stephan Theil,C. Tiede,L. Troisi,P. Tsalmantza,D. Tur,Mattia Vaccari,Frédéric Vachier,P. Valles,W. Van Hamme,L. Veltz,Jenni Virtanen,J.-M. Wallut,R. Wichmann,Mark I. Wilkinson,H. Ziaeepour,Sven Zschocke +590 more
TL;DR: The first Gaia data release, Gaia DR1 as discussed by the authors, consists of three components: a primary astrometric data set which contains the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the Hipparcos and Tycho-2 catalogues.
Journal ArticleDOI
Gaia Data Release 2: The astrometric solution
Lennart Lindegren,Jose M Hernandez,Alex Bombrun,Sergei A. Klioner,Ulrich Bastian,M. Ramos-Lerate,A. de Torres,H. Steidelmüller,C.A. Stephenson,David Hobbs,U. Lammers,M. Biermann,R. Geyer,Thomas Hilger,Daniel Michalik,U. Stampa,Paul J. McMillan,J. Castañeda,M. Clotet,G. Comoretto,Michael Davidson,C. Fabricius,G. Gracia,Nigel Hambly,A. Hutton,A. Mora,Jordi Portell,F. van Leeuwen,U. Abbas,A. Abreu,Martin Altmann,Martin Altmann,Alexandre Humberto Andrei,E. Anglada,L. Balaguer-Núñez,C. Barache,Ugo Becciani,Stefano Bertone,Stefano Bertone,Luciana Bianchi,S. Bouquillon,Geraldine Bourda,T. Brüsemeister,Beatrice Bucciarelli,D. Busonero,R. Buzzi,Rossella Cancelliere,T. Carlucci,Patrick Charlot,N. Cheek,Mariateresa Crosta,C. Crowley,J. H. J. de Bruijne,F. de Felice,R. Drimmel,P. Esquej,Agnes Fienga,E. Fraile,Mario Gai,N. Garralda,J.J. González-Vidal,Raphael Guerra,M. Hauser,M. Hauser,Werner Hofmann,B. Holl,Stefan Jordan,Mario G. Lattanzi,H. Lenhardt,S. Liao,E. Licata,Tim Lister,W. Löffler,Jon Marchant,J. M. Martín-Fleitas,R. Messineo,Francois Mignard,Roberto Morbidelli,E. Poggio,Alberto Riva,Nicholas Rowell,E. Salguero,M. Sarasso,Eva Sciacca,H. I. Siddiqui,Richard L. Smart,Alessandro Spagna,Iain A. Steele,F. Taris,J. Torra,A. van Elteren,W. van Reeven,Alberto Vecchiato +92 more
TL;DR: In this article, the authors describe the input data, models, and processing used for the astrometric content of Gaia DR2, and the validation of these results performed within the ASTR task.
Journal ArticleDOI
Gaia Data Release 1 - Astrometry: one billion positions, two million proper motions and parallaxes
Lennart Lindegren,U. Lammers,Ulrich Bastian,Jose M Hernandez,Sergei A. Klioner,David Hobbs,Alex Bombrun,Daniel Michalik,M. Ramos-Lerate,A. G. Butkevich,G. Comoretto,E. Joliet,Berry Holl,A. Hutton,P. Parsons,H. Steidelmüller,U. Abbas,Martin Altmann,Martin Altmann,Alexandre Humberto Andrei,Sonia Anton,N. Bach,C. Barache,Ugo Becciani,Jérôme Berthier,Luciana Bianchi,M. Biermann,S. Bouquillon,G. Bourda,T. Brüsemeister,Beatrice Bucciarelli,D. Busonero,T. Carlucci,J. Castañeda,Patrick Charlot,M. Clotet,Maria Teresa Crosta,Michael Davidson,F. de Felice,R. Drimmel,C. Fabricius,Agnes Fienga,F. Figueras,E. Fraile,Mario Gai,N. Garralda,R. Geyer,J.J. González-Vidal,Raphael Guerra,Nigel Hambly,M. Hauser,Stefan Jordan,Mario G. Lattanzi,H. Lenhardt,S. Liao,W. Löffler,Paul J. McMillan,Francois Mignard,A. Mora,Roberto Morbidelli,Jordi Portell,Alberto Riva,M. Sarasso,I. Serraller,H. I. Siddiqui,Richard L. Smart,Alessandro Spagna,U. Stampa,Iain A. Steele,F. Taris,J. Torra,W. van Reeven,Alberto Vecchiato,Sven Zschocke,J. H. J. de Bruijne,G. Gracia,F. Raison,Tim Lister,Jon Marchant,R. Messineo,Michael Soffel,J. Osorio,A. de Torres,William O'Mullane +83 more
TL;DR: Gaia Data Release 1 (Gaia DR1) as discussed by the authors contains a large amount of data collected by the Gaia satellite during the first 14 months of its operational phase, including positions, parallaxes, and proper motions to Hipparcos-type precision or better.
Journal ArticleDOI
Gaia Early Data Release 3. The astrometric solution
Lennart Lindegren,Sergei A. Klioner,Jose M Hernandez,Alex Bombrun,M. Ramos-Lerate,H. Steidelmüller,Ulrich Bastian,M. Biermann,A. de Torres,E. Gerlach,R. Geyer,Thomas Hilger,David Hobbs,U. Lammers,Paul J. McMillan,C.A. Stephenson,J. Castañeda,Michael Davidson,C. Fabricius,G. Gracia-Abril,Jordi Portell,Nicholas Rowell,David Teyssier,F. Torra,S. Bartolomé,M. Clotet,N. Garralda,J.J. González-Vidal,J. Torra,U. Abbas,Martin Altmann,Martin Altmann,E. Anglada Varela,L. Balaguer-Núñez,Zoltan Balog,Zoltan Balog,C. Barache,Ugo Becciani,M. Bernet,Stefano Bertone,Stefano Bertone,Stefano Bertone,Luciana Bianchi,S. Bouquillon,Anthony G. A. Brown,Beatrice Bucciarelli,D. Busonero,A. G. Butkevich,R. Buzzi,Rossella Cancelliere,T. Carlucci,Patrick Charlot,Maria-Rosa L. Cioni,Mariateresa Crosta,C. Crowley,E. F. del Peloso,E. del Pozo,Ronald Drimmel,P. Esquej,Agnes Fienga,Agnes Fienga,E. Fraile,Mario Gai,M. Garcia-Reinaldos,Raphael Guerra,Nigel Hambly,M. Hauser,K. Janßen,Stefan Jordan,Z. Kostrzewa-Rutkowska,Z. Kostrzewa-Rutkowska,Massimiliano Lattanzi,Massimiliano Lattanzi,S. Liao,E. Licata,Tim Lister,W. Löffler,Jon Marchant,A. Masip,Francois Mignard,Alexey Mints,D. Molina,Alcione Mora,Roberto Morbidelli,C. P. Murphy,C. Pagani,Pasquale Panuzzo,X. Peñalosa Esteller,E. Poggio,P. Re Fiorentin,Alberto Riva,A. Sagristà Sellés,V. Sanchez Gimenez,M. Sarasso,Eva Sciacca,H. I. Siddiqui,Richard L. Smart,D. Souami,D. Souami,Alessandro Spagna,Iain A. Steele,F. Taris,E. Utrilla,W. van Reeven,Alberto Vecchiato +104 more
TL;DR: Gaia Early Data Release 3 (Gaia EDR3) as mentioned in this paper contains results for 1.812 billion sources in the magnitude range G = 3-21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational phase.
Journal ArticleDOI
Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
Lennart Lindegren,U. Lammers,Ulrich Bastian,Jose M Hernandez,Sergei A. Klioner,David Hobbs,Alex Bombrun,Daniel Michalik,M. Ramos-Lerate,A. G. Butkevich,G. Comoretto,E. Joliet,Berry Holl,A. Hutton,P. Parsons,H. Steidelmüller,U. Abbas,Martin Altmann,Martin Altmann,Alexandre Humberto Andrei,Sonia Anton,N. Bach,C. Barache,Ugo Becciani,Jérôme Berthier,Luciana Bianchi,M. Biermann,S. Bouquillon,G. Bourda,T. Brüsemeister,Beatrice Bucciarelli,D. Busonero,T. Carlucci,J. Castañeda,Patrick Charlot,M. Clotet,Maria Teresa Crosta,Michael Davidson,F. de Felice,R. Drimmel,C. Fabricius,Agnes Fienga,F. Figueras,E. Fraile,Mario Gai,N. Garralda,R. Geyer,J.J. González-Vidal,Raphael Guerra,Nigel Hambly,M. Hauser,Stefan Jordan,Mario G. Lattanzi,H. Lenhardt,S. Liao,W. Löffler,Paul J. McMillan,Francois Mignard,A. Mora,Roberto Morbidelli,Jordi Portell,Alberto Riva,M. Sarasso,I. Serraller,H. I. Siddiqui,Richard L. Smart,Alessandro Spagna,U. Stampa,Iain A. Steele,F. Taris,J. Torra,W. van Reeven,Alberto Vecchiato,Sven Zschocke,J. H. J. de Bruijne,G. Gracia,F. Raison,Tim Lister,Jon Marchant,R. Messineo,Michael Soffel,J. Osorio,A. de Torres,William O'Mullane +83 more
TL;DR: Gaia Data Release 1 (Gaia DR1) as mentioned in this paper contains a large amount of data collected by the Gaia satellite during the first 14 months of its operational phase, including positions, parallaxes, and proper motions to Hipparcos-type precision or better.