Gaia Data Release 1. Testing parallaxes with local Cepheids and RR Lyrae stars

@article{Clementini2017GaiaDR,
  title={Gaia Data Release 1. Testing parallaxes with local Cepheids and RR Lyrae stars},
  author={G. Clementini and Laurent Eyer and Vincenzo Ripepi and Marcella Marconi and Tatiana Muraveva and Alessia Garofalo and Luis M. Sarro and M. J. Palmer and Xavier Luri and Roberto Molinaro and Lorenzo Rimoldini and L{\'a}szl{\'o} Szabados and Ilaria Musella and Richard I. Anderson and Timo Prusti and Jos H.J. de Bruijne and A. G. A. Brown and Antonella Vallenari and C. Babusiaux and Coryn A. L. Bailer-Jones and Ulrich Bastian and Michael Biermann and D. W. Evans and Fred A. Jansen and Carme Jordi and Sergei A. Klioner and Uwe Lammers and Lennart Lindegren and François Mignard and Chantal Panem and Dimitri Pourbaix and Sofia Randich and Paola Sartoretti and H. Siddiqui and C. Soubiran and Veronique Valette and Floor van Leeuwen and Nicholas A. Walton and Conny Aerts and Fr{\'e}d{\'e}ric Arenou and Mark S. Cropper and Ronald Drimmel and Erik H{\o}g and Daniel Martin Katz and Mario Gilberto Lattanzi and William O'Mullane and Eva K. Grebel and Andrew D. Holland and Claude Huc and Xavier Passot and Michael A. C. Perryman and Lorenzo Bramante and Carla Cacciari and Javier Casta{\~n}eda and Laurence Chaoul and N. Cheek and Francesca De Angeli and Claus Fabricius and R. Guerra and J. I. Gonz'alez Hern'andez and A. Jean-Azntoine-Piccolo and Eduard Masana and Rosario Messineo and Nami Mowlavi and Krzysztof Nienartowicz and D. Ord'onez-Blanco and Pasquale Panuzzo and Jordi Portell and P. J. Richards and Marco Riello and George Seabroke and Paolo Tanga and Fr'ed'eric Th'evenin and Jordi Torra and Sebastian G. Els and G. Gracia-Abril and Gabriele Comoretto and M. Garcia-Reinaldos and T. Lock and E. Mercier and Martin Altmann and Ren{\'e} Andrae and Tri L. Astraatmadja and Ioannis Bellas-Velidis and Kevin Benson and J{\'e}r{\^o}me Berthier and Ronny Blomme and Giorgia Busso and Beno{\^i}t Carry and A Cellino and Shannon Cowell and Orlagh L. Creevey and Johan Peter Cuypers and Michael Davidson and Joris De Ridder and Anthony D. Torres and Ludovic Delchambre and Aldo Dell’Oro and Christine Ducourant and Yves Fr'emat and M. Garc'ia-Torres and Eric Gosset and J. L. Halbwachs and Nigel C. Hambly and D L Harrison and Marcus Hauser and Daniel Hestroffer and Simon T. Hodgkin and Howard E. Huckle and Alexander Hutton and G{\'e}rard Jasniewicz and Stefan Jordan and Mary Kontizas and Andreas Korn and Alessandro C. Lanzafame and Minia Manteiga and Andr{\'e} Moitinho and Karri Muinonen and J. O. Osinde and E Pancino and Th. Pauwels and J. M. Petit and Alejandra Recio-Blanco and Annie C. Robin and Christos Siopis and M. W. L. Smith and K. W. Smith and Alessandro Sozzetti and William Thuillot and Wouter van Reeven and Y. P. Viala and Ummi Abbas and Asier A. Aramburu and S. Accart and Juan J. Aguado and Peter M. Allan and Walter Allasia and G. Altavilla and Marco Antonio {\'A}lvarez and Jo{\~a}o Alves and Alexandre Humberto Andrei and E. Anglada Varela and E. Antiche and T. Antoja and Sonia Ant'on and Bernardino Arcay and Nuria Bach and Stephen Baker and Lola Balaguer-N'unez and Christophe Barache and Carlos Barata and Anne Barbier and Fabio Barblan and David Barrado y Navascu'es and M. Barros and Martin A. Barstow and Ugo Becciani and Michele Bellazzini and A. Bello Garc'ia and Vasily A Belokurov and Philippe P. Bendjoya and Angel Berihuete and Luciana Bianchi and Olivier Bienaym'e and Francoise Billebaud and Nadejda Blagorodnova and Sergi Blanco-Cuaresma and T. Boch and Alex Bombrun and R. Borrachero and S{\'e}bastien Bouquillon and G{\'e}raldine Bourda and Herv{\'e} Bouy and Angela Bragaglia and Maarten A. Breddels and Nathalie Brouillet and T. Brusemeister and Beatrice Bucciarelli and P. W. Burgess and Ross Burgon and Alexandru Burlacu and Deborah Busonero and Raffaella Buzzi and Elisabetta Caffau and J. Cambras and Harry Campbell and Rossella Cancelliere and Tristan Cantat-Gaudin and T. Carlucci and Josep Manel Carrasco and Marco Castellani and Patrick Charlot and Jonathan Charnas and Andrea Chiavassa and Marcial Clotet and Gabriele Cocozza and Ross S. Collins and Gr'ainne Costigan and F. Crifo and N.J.G.Cross and Mariateresa Crosta and C. M. Crowley and Carlos Dafonte and Yassine Damerdji and A. Dapergolas and Pedro David and M. David and Peter De Cat and Fernando de Felice and Patrick de Laverny and Fiore De Luise and Ruben De March and Regina de Souza and Jonas Debosscher and E. Perea del Pozo and Marco Delbo’ and Ademar Tavares Delgado and H{\'e}ctor E. Delgado and P. Di Matteo and S. Diakit{\'e} and Elisa Distefano and Chris Dolding and Sandra dos Anjos and Petros Drazinos and J. S. Castellanos Dur'an and Yifat Dzigan and Bengt Edvardsson and Harry Enke and N. Wyn Evans and G. Eynard Bontemps and Caroline Fabre and Michele Fabrizio and Simchon Faigler and Ant{\'o}nio J. Falc{\~a}o and Marti Farras Casas and Luciana Federici and Grigori Fedorets and J. Fern'andez-Hern'ande and Pierre Fernique and A. Fienga and Francesca Figueras and Fabio Filippi and Krzysztof Findeisen and Antonio Fonti and Morgan Fouesneau and Eduardo Miguel Gonz{\'a}lez Fraile and Morgan Fraser and J. Fuchs and Mario Gai and Silvia Regina Galleti and Laurent Galluccio and Daniel Garabato and F. Garc'ia-Sedano and Nora Garralda and Panagiotis Gavras and Joris Gerssen and R. Geyer and Gerry Gilmore and Sergi Girona and Gaetano Giuffrida and M. Gomes and A. Gonz'alez-Marcos and J. Gonz'alez-N'unez and J. J. Gonz'alez-Vidal and Mikael Granvik and A. Guerrier and Patrick Guillout and Julien Guiraud and Andr'es G'urpide and R. Guti'errez-S'anchez and Leanne P. Guy and R{\'e}gis Haigron and Despina Hatzidimitriou and M. Haywood and Ulrike Heiter and Amina Helmi and David Hobbs and W. Hofmann and Berry Holl and G. Holland and J.A.S.Hunt and Arkadiusz Hypki and V. Icardi and Michael J. Irwin and Gr{\'e}gory Jevardat de Fombelle and Paula Jofr'e and Peter G. Jonker and Alain Jorissen and F. Julb{\'e} and Antonios Karampelas and Angela Kochoska and Ralf Kohley and Katrien Kolenberg and Evangelos Tzanni Kontizas and Sergey E. Koposov and Georges Kordopatis and Pavel Koubsk{\'y} and Alberto Krone-Martins and M. V. Kudryashova and Ilya Kull and R. K. Bachchan and F. Lacoste-Seris and A. F. Lanza and Joe B. Lavigne and Christophe Le Poncin-lafitte and Yveline Lebreton and Thomas Lebzelter and S. Leccia and Nicolas Leclerc and Isabelle Lecoeur-Taibi and Vincent Lema{\^i}tre and Helmut Lenhardt and Fabrice Leroux and Shi-long Liao and Enrico Licata and H.E.P.Lindstrom and Tim A. Lister and E. Livanou and A. Lobel and Wolfgang Loffler and M. L'opez and D. Lorenz and I. MacDonald and Tiago Fernandes and S. Managau and Robert G. Mann and Gregory Mantelet and Olivier Marchal and Jonathan M. Marchant and S. Marinoni and P. M. Marrese and G. Marschalk'o and Douglas J. Marshall and J. M. Mart'in-Fleitas and Mario di Martino and N. Mary and Gal Matijevivc and Tsevi Mazeh and Paul J. McMillan and Sergio Messina and Daniel Michalik and N. R. Millar and B.M.H.Miranda and D. Molina and M. Molinaro and L'aszl'o Moln'ar and Marc Moniez and P. Montegriffo and R. Mor and Andr{\'e} Mora and Roberto Morbidelli and Thierry Morel and Stephan Morgenthaler and D. Morris and Angelo Fabio Mulone and J. Narbonne and Gijs Nelemans and Luciano Nicastro and L. Noval and C. Ord'enovic and Joaqu{\'i}n B. Ordieres Mer{\'e} and P. J. Osborne and Claudio Pagani and Isabella Pagano and Fr{\'e}d{\'e}ric Pailler and H. Palacin and Lovro Palaversa and P. Parsons and Marco Pecoraro and R. Pedrosa and H. Pentikainen and Bernard Pichon and Anna Marina Piersimoni and F.-X. Pineau and Emese Plachy and G. Plum and E. Poujoulet and Andrej Prvsa and L. Pulone and Simone Ragaini and S. Rago and N. Rambaux and Mercedes Ramos-lerate and Piero Ranalli and Gregor Rauw and Andrew M. Read and Sara Regibo and C'eline Reyl'e and Rita Almeida Ribeiro and Alberto Riva and Guy Rixon and Maroussia Roelens and Merce Romero-G'omez and Nick Rowell and Fr{\'e}d{\'e}ric Royer and L. Ruiz-Dern and Gilles Sadowski and T. Sagrista Sell'es and Johannes Sahlmann and Jes{\'u}s J. Salgado and E. Salguero and Maria Sarasso and H{\'e}lder Savietto and Mathias Schultheis and Eva Sciacca and Matthieu S{\'e}gol and Juan Carlos Segovia and Damien S{\'e}gransan and I-C. Shih and Riccardo Smareglia and Richard L. Smart and Enrique Solano and Filomena Solitro and Rosanna Sordo and S. Soria Nieto and Jean J Souchay and Alessandro Spagna and Federica Spoto and Ulrike Stampa and Iain A. Steele and H. Steidelmuller and Craig Stephenson and Hristo Stoev and Frank Suess and Maria Suveges and Jean Surdej and Elza Szegedi-Elek and Daniel Tapiador and François Taris and G. Tauran and M. B. Taylor and Ramachrisna Teixeira and David L. Terrett and Brandon Tingley and Scott C. Trager and Catherine Turon and Ana Ulla and E. Utrilla and Gaetano Valentini and Arjen van Elteren and E. Van Hemelryck and Marco van Leeuwen and Mih{\'a}ly V{\'a}radi and Alberto Vecchiato and Jovan Veljanoski and T. Via and D. Vicente and Steven S. Vogt and H. Voss and Viktor Votruba and S. Voutsinas and Gavin Walmsley and Michael J. Weiler and K. Weingrill and Thomas Wevers and Lukasz Wyrzykowski and Aybuke Kupcu Yoldas and M. vZerjal and Shay Zucker and Christine Zurbach and Toma{\vz} Zwitter and Alin Alecu and Mark G. Allen and Carlos Allende Prieto and Ant{\'o}nio Amorim and Guillem Anglada-Escud'e and Vladimir Arsenijevi{\'c} and S. Azaz and Paul Balm and M. Beck and H. H. Bernstein and Lionel Bigot and Albert Bijaoui and C. Blasco and Maria Elena Bonfigli and Giuseppe Bono and Steve Boudreault and Alessandro Bressan and S. Brown and Paul M. Brunet and Peter Bunclark and Roberto Buonanno and Alexey G. Butkevich and Celine Carret and Carolina Soto Carri{\'o}n and Laurent Chemin and F. Ch'ereau and Leonardo Corcione and E. Darmigny and Klass S. de Boer and Pilar de Teodoro and P. T. de Zeeuw and Claire Delle Luche and Carolina Davila Domingues and Pierre Dubath and F. Fodor and B. Fr'ezouls and A. Fries and Diego Fustes and D. J. Fyfe and E. Gallardo and J. Gallegos and Daniele Gardiol and Marwan Gebran and Andreja Gomboc and A. G'omez and E. Grux and Alain Gueguen and A. Heyrovsk{\'y} and John Hoar and G. Iannicola and Yago Isasi Parache and A.-M. Janotto and E. Joliet and An I. Jonckheere and Ralf Keil and D.-W. Kim and P'eter Klagyivik and Jochen Klar and J. K. Knude and Oleg Kochukhov and Indrek Kolka and Janez Kos and A. Kutka and Val{\'e}ry Lainey and D. Lebouquin and C. Liu and Davide Loreggia and Valeri V. Makarov and Matthieu Marseille and Christophe Martayan and Oscar Martinez-Rubi and Beno{\^i}t Y. G. Massart and Fr{\'e}d{\'e}ric Meynadier and Shan Mignot and U. Munari and A. T. Nguyen and Thomas Nordlander and Karen O'flaherty and Pierre Ocvirk and Adri{\'a}n Sanz and P. Ortiz and J. J. Pereira Osorio and Dagmara Oszkiewicz and A. Ouzounis and P. Park and Ester Pasquato and Carlos Peltzer and Javier Peralta and F. P'eturaud and T. Pieniluoma and E. Pigozzi and Jo{\"e}l Poels and Gemma Prat and Thibaut Prod’homme and Frederic Raison and Jos{\'e} Manuel Rebord{\~a}o and D. Risquez and Brigitte Rocca-Volmerange and Stuart Rosen and Mar{\'i}a Idoia Ruiz-Fuertes and Federico Russo and Steve Sembay and I. Serraller Vizcaino and Alexander D. Short and Arnaud Siebert and H. Silva and Dimitris Sinachopoulos and {\'E}ric Slezak and Michael Soffel and Danuta Sosnowska and V. Straivzys and Mark ter Linden and Dirk Terrell and Stephan Theil and Carola Tiede and L. Troisi and Paraskevi Tsalmantza and Dmitry Tur and Mattia Vaccari and Fr{\'e}d{\'e}ric Vachier and Pilar Valles and Walter V. van Hamme and L. Veltz and Jenni Virtanen and J.-M. Wallut and Rainer Wichmann and Mark I. Wilkinson and Houri Ziaeepour and Sven Zschocke},
  journal={Astronomy and Astrophysics},
  year={2017},
  volume={605},
  pages={1-29}
}
Parallaxes for 331 classical Cepheids, 31 Type II Cepheids and 364 RR Lyrae stars in common between Gaia and the Hipparcos and Tycho-2 catalogues are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS). In order to test these first parallax measurements of the primary standard candles of the cosmological distance ladder, that involve astrometry collected by Gaia during the initial 14 months of science operation, we compared them with literature estimates… 
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