Hot Stuff for One Year (HSOY): a 583 million star proper motion catalogue derived from Gaia DR1 and PPMXL
<i>Context. <i/>Recently, the first installment of data from the ESA <i>Gaia <i/>astrometric satellite mission (<i>Gaia <i/>DR1) was released, containing positions of more than 1 billion stars with unprecedented precision. This release contains the proper motions...
Gespeichert in:
| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 March 2017
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| In: |
Astronomy and astrophysics
Year: 2017, Jahrgang: 600 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201730393 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1051/0004-6361/201730393
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| Verfasserangaben: | M. Altmann, S. Roeser, M. Demleitner, U. Bastian, and E. Schilbach |
MARC
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| 245 | 1 | 0 | |a Hot Stuff for One Year (HSOY) |b a 583 million star proper motion catalogue derived from Gaia DR1 and PPMXL |c M. Altmann, S. Roeser, M. Demleitner, U. Bastian, and E. Schilbach |
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| 520 | |a <i>Context. <i/>Recently, the first installment of data from the ESA <i>Gaia <i/>astrometric satellite mission (<i>Gaia <i/>DR1) was released, containing positions of more than 1 billion stars with unprecedented precision. This release contains the proper motions and parallaxes, however, for only a subset of 2 million objects. The second release will include those quantities for most objects.<i>Aims. <i/>In order to provide a dataset that bridges the time gap between the <i>Gaia <i/>DR1 and <i>Gaia <i/>DR2 releases and partly remedies the lack of proper motions in the former, Hot Stuff for One Year (HSOY) was created as a hybrid catalogue between <i>Gaia <i/>and ground-based astrometry. This catalogue features proper motions (but no parallaxes) for a large percentage of the DR1 objects. While not attempting to compete with future <i>Gaia <i/>releases in terms of data quality or number of objects, the aim of HSOY is to provide improved proper motions partly based on <i>Gaia <i/>data and to allow studies to be carried out now or as pilot studies for later projects requiring higher precision data.<i>Methods. <i/>The HSOY catalogue was compiled using the positions taken from <i>Gaia <i/>DR1 combined with the input data from the PPMXL catalogue, employing the same weighted least-squares technique that was used to assemble the PPMXL catalogue itself.<i>Results. <i/>This effort resulted in a four-parameter astrometric catalogue containing 583 million stars with <i>Gaia <i/>DR1 quality positions and proper motions with precisions from far less than 1 mas/yr to 5 mas/yr, depending on object brightness and location on the sky. | ||
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