Gaia Data Release 2: Focus on astrophysics Combined Hertzprung-Russell diagrams of star clusters . Gaia Data Release 2 sky map in colour.The map is a map of the measured brightness, or flux, of the almost 1.7 billion sources in Gaia DR2. I/345/gaia2 (c) Gaia data release 2 (Gaia DR2). At G < 7 mag, however, there are still many sources missing from the catalogue, primarily due to the difficulties of treating saturated CCD images. It is a combination of three other maps, separately compiling the fluxes measured in the Gaia G, G BP and G RP photometric bands. (Download all Gaia Sources as VOTable, FITS or CSV here.Query from the command line using find_gaia_dr2 available in cdsclient here) (original column names in green) (1692919135 rows)I/345/rvstdcat (c) Mean radial velocities on absolute scale (original column names in green)[timeSerie] (4813 rows) I/345/rvstdmes Access all public data generated by the ESA mission to chart a three-dimensional map of our Galaxy. The Hertzprung-Russell diagram (HRD) displays physical properties of stars, and their dependence on the star's mass, age and chemical composition. ESA Gaia Archive. Dafydd Wyn Evans IAUS 330 @ Nice, 28 April 2017 The survey represented by Gaia DR2 is essentially complete between G = 12 and G = 17 mag. These individual maps are built by adding, or integrating, the flux of all sources that fall within each pixel. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision. At the bright end, the completeness has improved compared to Gaia DR1. Gaia Photometric Data: DR1 results and DR2 expectations Dafydd Wyn Evans, Marco Riello, Francesca De Angeli, ... • Saturation handled better ... treat Gaia DR2 as a totally new catalogue. Gaia is a space observatory of the European Space Agency (ESA), launched in 2013 and expected to operate until c. 2022.

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