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The Gaia Revolution
- 1. The Gaia Revolution First Data Release properties Ronald Drimmel, INAF – OATo : @rdrimmel : drimmel@oato.inaf.it
- 5. Gaia + 1 billion stars RonaldDrimmel,23/01/2017
- 6. Gaia Data Release 1 RonaldDrimmel,23/01/2017 Released September 14, 2016 Contents: • Positions and G magnitude for > 1B sources • Full astrometry for a subset of >2M sources • 3194 Cepheids and RRLyrae stars: Light curves and parameters ESA web page: https://www.cosmos.esa.int/web/gaia/dr1
- 7. Gaia Data Release 1 RonaldDrimmel,23/01/2017
- 8. The Gaia Sky (Data Release 1) ESA/Gaia/DPAC/André Moitinho & Màrcia Barros (CENTRA - University of Lisbon) RonaldDrimmel,23/01/2017
- 11. Single Transit:1 low res SM image + 9 AF windows BP RP 3 RVS spectra (bright stars only) Ronald Drimmel, 30/09/2016
- 12. QA criteria Astrometry: Primary (TGAS) solution: 𝜎 𝜛 < 1 mas and 𝜎pos, max < 20 mas Secondary solution: Ntransits > 5 and 𝜖i < 20 mas and 𝜎pos, max < 100 mas Photometry: Sources within the color range of the calibrations RonaldDrimmel,23/01/2017
- 14. Spurious sources RonaldDrimmel23/01/2017 Belokurov et al (arXiv)
- 15. Completeness RonaldDrimmel,23/01/2017 Limiting magnitude: 99% percentile of the G distribution in ecliptic coordinates Arenou et al. (arXiv)
- 16. Completeness RonaldDrimmel,23/01/2017 UCAC4 sources not in Gaia Gaia DR1 (5%) Arenou et al. (arXiv)
- 17. Completeness RonaldDrimmel,23/01/2017 Gaia Collaboration, Brown, A.G.A. et al (arXiv)
- 18. Uncertainties: Astrometry • Statistics on the secondary solution? Error vs. magnitude? RonaldDrimmel23/01/2017 Mignard et al. (arXiv)
- 19. Uncertainties: Photometry RonaldDrimmel,23/01/2017 van Leeuwen et al. (arXiv)
- 20. Uncertainties: Photometry RonaldDrimmel,23/01/2017 van Leeuwen et al. (arXiv)
- 21. TGAS hybrid astrometry • 14 months of Gaia observations + Tycho2 position • All sources treated as single stars (5 parameters) • To be published: 𝜎 𝜛 < 1 mas and 𝜎pos, max < 20 mas RonaldDrimmel23/01/2017 Hipp/Tycho2 position Gaia observations Michalik et al, 2015 (arXiv)
- 23. Completeness RonaldDrimmel,23/01/2017 Gaia Collaboration, Brown, A.G.A. et al (arXiv)
- 25. Completeness of TGAS wrt Tycho2 RonaldDrimmel23/01/2017
- 26. Completeness of TGAS wrt Tycho2 RonaldDrimmel23/01/2017
- 30. Spatial component of the TGAS selection function Ronald Drimmel, 23/01/2017
- 32. Astrometric uncertainties: TGAS RonaldDrimmel,23/01/2017 Gaia Collaboration, Brown, A.G.A., Vallenari, A., et al. (arXiv)
- 33. Astrometric uncertainties: TGAS RonaldDrimmel,23/01/2017 Lindegren et al. (arXiv) 𝜎 𝜛
- 34. Astrometric uncertainties: TGAS RonaldDrimmel,23/01/2017 Lindegren et al. (arXiv) 𝜎 𝜇 𝛼*
- 35. Astrometric uncertainties: TGAS RonaldDrimmel,23/01/2017 Lindegren et al. (arXiv) 𝜌(𝜛, 𝜇 𝛼*)
- 36. Correlations for Hipparcos subset RonaldDrimmel23/01/2017 Eloisa Poggio et al 𝜌(𝜛, 𝜇 𝛼*)
- 37. Astrometric uncertainties: TGAS RonaldDrimmel,23/01/2017 Go to: https://www.cosmos.esa.int/web/gaia/dr1 Lindegren et al. (arXiv)
- 38. TGAS Systematic errors • A global parallax zero-point error = ±0.04 mas may be present. • Over large angular scales, parallax zero-point variations of ±0.3 mas. – Averaging parallaxes over small regions of the sky (i.e. ≈10°) will not reduce the uncertainty on the mean – Over large areas: parallaxes uncertainties = ±σϖ (random) ±0.3 mas (systematic) – Only affects the parallaxes • colour dependent and spatially correlated systematic errors at the level of ±0.2 mas See Lindegren et al. (arXiv) and Arenou et al. (arXiv) RonaldDrimmel23/01/2017
- 39. Gaia DR1 More info: http://www.cosmos.esa.int/web/gaia/dr1 Data Access: • ESA/ESAC: http://archives.esac.esa.int/gaia/ (link is external) • CDS: http://cdsweb.u-strasbg.fr/gaia (link is external) • ARI: http://gaia.ari.uni-heidelberg.de/index.html (link is external) • AIP: https://gaia.aip.de/ (link is external) • ASI/ASCD: http://gaia.asdc.asi.it/ (link is external) RonaldDrimmel,30/09/2016
- 40. Gaia data release scenario DR1 DR2 DR3 DR4 DR5 2016 (2018) 2018 (TBC) 2019 (TBC) 2022 (TBC) Astrometry Spectro- photometry Spectroscopy Variability Binary solutions Astrophysical parameters Details of future releases: http://www.cosmos.esa.int/web/gaia/release End-of-mission performances: http://www.cosmos.esa.int/web/gaia/release RonaldDrimmel,30/09/2016