Gaia Data Release 1 : Pre-processing and source list creation

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Gaia Data Release 1 : Pre-processing and source list creation

Fabricius, C. (author): University of Barcelona

Bastian, U. (author): Heidelberg University

Portell, J. (author): University of Barcelona

Castañeda, J. (author): University of Barcelona

Davidson, M. (author): University of Edinburgh

Hambly, N. C. (author): University of Edinburgh

Clotet, M. (author): University of Barcelona

Biermann, M. (author): Heidelberg University

Mora, A. (author)

Busonero, D. (author)

Riva, A. (author)

Brown, A. G A (author)

Smart, R. (author)

Lammers, U. (author): European Space Astronomy Centre

Torra, J. (author): University of Barcelona

Drimmel, R. (author)

Gracia, G. (author)

Löffler, W. (author): Heidelberg University

Spagna, A. (author)

Lindegren, L. (author): Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science

Klioner, S. (author)

Andrei, A. (author)

Bach, N. (author)

Bramante, L. (author): ALTEC S.p.A.

Brüsemeister, T. (author): Heidelberg University

Busso, G. (author): University of Cambridge

Carrasco, J. M. (author): University of Barcelona

Gai, M. (author)

Garralda, N. (author): University of Barcelona

González-Vidal, J. J. (author): University of Barcelona

Guerra, R. (author): European Space Astronomy Centre

Hauser, M. (author): Heidelberg University

Jordan, S. (author): Heidelberg University

Jordi, C. (author): University of Barcelona

Lenhardt, H. (author): Heidelberg University

Mignard, F. (author)

Messineo, R. (author): ALTEC S.p.A.

Mulone, A. (author): ALTEC S.p.A.

Serraller, I. (author)

Stampa, U. (author): Heidelberg University

Tanga, P. (author)

Van Elteren, A. (author)

Van Reeven, W. (author)

Voss, H. (author): University of Barcelona

Abbas, U. (author)

Allasia, W. (author)

Altmann, M. (author)

Anton, S. (author): University of Porto,University of Lisbon

Barache, C. (author)

Becciani, U. (author)

Berthier, J. (author)

Bianchi, L. (author)

Bombrun, A. (author)

Bouquillon, S. (author)

Bourda, G. (author)

Bucciarelli, B. (author)

Butkevich, A. (author)

Buzzi, R. (author)

Cancelliere, R. (author)

Carlucci, T. (author)

Charlot, P. (author)

Collins, R. (author): University of Edinburgh

Comoretto, G. (author)

Cross, N. (author): University of Edinburgh

Crosta, M. (author)

De Felice, F. (author): University of Padova

Fienga, A. (author): The French National Centre for Scientific Research (CNRS)

Figueras, F. (author): University of Barcelona

Fraile, E. (author)

Geyer, R. (author)

Hernandez, J. (author): European Space Astronomy Centre

Hobbs, D. (author): Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science

Hofmann, W. (author): Heidelberg University

Liao, S. (author)

Licata, E. (author)

Martino, M. (author): ALTEC S.p.A.

McMillan, P. J. (author): Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science

Michalik, D. (author): Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science

Morbidelli, R. (author)

Parsons, P. (author)

Pecoraro, M. (author)

Ramos-Lerate, M. (author)

Sarasso, M. (author)

Siddiqui, H. (author): University of Padova

Steele, I. (author)

Steidelmüller, H. (author)

Taris, F. (author)

Vecchiato, A. (author)

Abreu, A. (author)

Anglada, E. (author)

Boudreault, S. (author): Max Planck Institute for Solar System Research

Cropper, M. (author)

Holl, B. (author): University of Geneva

Cheek, N. (author)

Crowley, C. (author)

Fleitas, J. M. (author)

Hutton, A. (author)

Osinde, J. (author)

Rowell, N. (author): University of Edinburgh

Salguero, E. (author)

Utrilla, E. (author)

Blagorodnova, N. (author): California Institute of Technology

Soffel, M. (author)

Osorio, J. (author)

Vicente, D. (author)

Cambras, J. (author)

Bernstein, H. H. (author): Heidelberg University

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(creator_code:org_t)

2016-11-25
2016
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 595

Related links:: http://dx.doi.org/10...; show more...; https://www.aanda.or...; https://lup.lub.lu.s...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Context. The first data release from the Gaia mission contains accurate positions and magnitudes for more than a billion sources, and proper motions and parallaxes for the majority of the 2.5 million Hipparcos and Tycho-2 stars. Aims. We describe three essential elements of the initial data treatment leading to this catalogue: the image analysis, the construction of a source list, and the near real-time monitoring of the payload health. We also discuss some weak points that set limitations for the attainable precision at the present stage of the mission. Methods. Image parameters for point sources are derived from one-dimensional scans, using a maximum likelihood method, under the assumption of a line spread function constant in time, and a complete modelling of bias and background. These conditions are, however, not completely fulfilled. The Gaia source list is built starting from a large ground-based catalogue, but even so a significant number of new entries have been added, and a large number have been removed. The autonomous onboard star image detection will pick up many spurious images, especially around bright sources, and such unwanted detections must be identified. Another key step of the source list creation consists in arranging the more than 1010 individual detections in spatially isolated groups that can be analysed individually. Results. Complete software systems have been built for the Gaia initial data treatment, that manage approximately 50 million focal plane transits daily, giving transit times and fluxes for 500 million individual CCD images to the astrometric and photometric processing chains. The software also carries out a successful and detailed daily monitoring of Gaia health.

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By the author/editor: Fabricius, C.; Bastian, U.; Portell, J.; Castañeda, J.; Davidson, M.; Hambly, N. C.; show more...; Clotet, M.; Biermann, M.; Mora, A.; Busonero, D.; Riva, A.; Brown, A. G A; Smart, R.; Lammers, U.; Torra, J.; Drimmel, R.; Gracia, G.; Löffler, W.; Spagna, A.; Lindegren, L.; Klioner, S.; Andrei, A.; Bach, N.; Bramante, L.; Brüsemeister, T.; Busso, G.; Carrasco, J. M.; Gai, M.; Garralda, N.; González-Vidal, ...; Guerra, R.; Hauser, M.; Jordan, S.; Jordi, C.; Lenhardt, H.; Mignard, F.; Messineo, R.; Mulone, A.; Serraller, I.; Stampa, U.; Tanga, P.; Van Elteren, A.; Van Reeven, W.; Voss, H.; Abbas, U.; Allasia, W.; Altmann, M.; Anton, S.; Barache, C.; Becciani, U.; Berthier, J.; Bianchi, L.; Bombrun, A.; Bouquillon, S.; Bourda, G.; Bucciarelli, B.; Butkevich, A.; Buzzi, R.; Cancelliere, R.; Carlucci, T.; Charlot, P.; Collins, R.; Comoretto, G.; Cross, N.; Crosta, M.; De Felice, F.; Fienga, A.; Figueras, F.; Fraile, E.; Geyer, R.; Hernandez, J.; Hobbs, D.; Hofmann, W.; Liao, S.; Licata, E.; Martino, M.; McMillan, P. J.; Michalik, D.; Morbidelli, R.; Parsons, P.; Pecoraro, M.; Ramos-Lerate, M.; Sarasso, M.; Siddiqui, H.; Steele, I.; Steidelmüller, H ...; Taris, F.; Vecchiato, A.; Abreu, A.; Anglada, E.; Boudreault, S.; Cropper, M.; Holl, B.; Cheek, N.; Crowley, C.; Fleitas, J. M.; Hutton, A.; Osinde, J.; Rowell, N.; Salguero, E.; Utrilla, E.; Blagorodnova, N.; Soffel, M.; Osorio, J.; Vicente, D.; Cambras, J.; Bernstein, H. H.; show less...

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Gaia Data Release 1 : Pre-processing and source list creation

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