TGAS catalogue
This table is a subset of GaiaSource 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. All rows have Gaia
solution id 1635378410781933568.
GAIA Collaboration
Catalog
AllSky ICRS
Optical
2016-09-07T13:29:08Z
1000
stars
surveys
astrometry
proper-motions
If you use public Gaia DR1 data in your paper, please take note of
`ESAC's guide`_ on how to acknowledge and cite Gaia DR1.
.. _ESAC's guide: http://gaia.esac.esa.int/documentation/GDR1/Miscellaneous/sec_credit_and_citation_instructions.html
0/0-11
2.721e-19 4.138e-19
data/gaiadr1_tgas.fits
raj2000: ra,
dej2000: dec
/tap/sync
row = self.getFirstVOTableRow()
self.assertEqual(len(row), 56)
self.assertEqual(row["phot_variable_flag"], None)
self.assertAlmostEqual(row["parallax"], 32.05400085449219)
self.assertAlmostEqual(row["astrometric_excess_noise_sig"],
478.05993652)
self.assertAlmostEqual(row['scan_direction_mean_k4'],
21.1312, places=4)