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Table 1.
SQL query used to select the sources from the Gaia DR2 catalog using the services provided by the Gaia TAP server.
SELECT *
FROM gaiadr2:gaia_source
WHERE parallax > 20
AND parallax_over_error > 10
AND phot_g_mean_flux_over_error > 50
AND phot_rp_mean_flux_over_error > 20
AND visibility_periods_used > 8
AND astrometric_chi2_al/(astrometric_n_good_obs_al - 5) < 1.44 * greatest(1, exp(-0.4 * (phot_g_mean_mag - 19.5)))
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