A. Hutton

TL;DR: In this paper, the authors describe the processing of the Gaia DR2 data, and describe the criteria used to select the sample published in Gaia DR 2, and explore the data set to assess its quality.

TL;DR: In this paper, the second data release of the Gaia mission and its power for constraining many different aspects of the dynamics of the satellites of the Milky Way is demonstrated. But the accuracy of the errors, statistical and systematic, are relatively well understood.

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.

TL;DR: The third data release of the European Space Agency's Gaia mission, GDR3 as discussed by the authors , contains the same source list, celestial positions, proper motions, parallaxes, and broad band photometry in the G, G$BP}$, and G$RP}$ pass-bands already present in the Early Third Data Release.

TL;DR: The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS) component by means of the astrometric data for open clusters as discussed by the authors, which is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using Hipparcos and Tycho 2 positions in 1991.