2 Gaia-TGAS ivo://irsa.ipac/Gaia/TGAS NASA/IPAC Infrared Science Archive Gaia Collaboration 2016-09-27 3 IRSA Support Team

irsasupport@ipac.caltech.edu sky survey This table is a subset of gaia_source comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution. https://irsa.ipac.caltech.edu/Missions/gaia.html Catalog Research served-by IRSA TAP service 2 https://irsa.ipac.caltech.edu/SCS?table=gaia_tgas_source& 180 2147483647 false 21.83654 60.505683 0.0028 2 To access this resource via TAP, issue ADQL queries on the table named gaia_tgas_source. https://irsa.ipac.caltech.edu/TAP 2 https://irsa.ipac.caltech.edu/cgi-bin/Gator/nph-dd?catalog=gaia_tgas_source Optical gaia Gaia DR1 Database gaia_tgas_sourceTycho-Gaia Astrometric Solution (TGAS) Source Table