giant.catalogs.meta_catalog.GIANT_COLUMNS

giant.catalogs.meta_catalog.GIANT_COLUMNS: List[str] = ['ra', 'dec', 'distance', 'ra_proper_motion', 'dec_proper_motion', 'mag', 'ra_sigma', 'dec_sigma', 'distance_sigma', 'ra_pm_sigma', 'dec_pm_sigma', 'epoch']

This specifies the name of the DataFrame columns used to store star observations in GIANT.

These columns represent the minimum set of data that GIANT needs to know about a star to use it for star identification. A description of each column follows.

column	units	description
‘ra’	deg	The right ascension of the star after correcting for proper motion
‘dec’	deg	The declination of the star after correcting for proper motion
‘distance’	km	The distance to the star from the Solar system barycenter (converted from parallax). This column has a default value of 5.428047027e15 if no parallax information is provided by the catalog.
‘ra_proper_motion’	deg/year	The proper motion for the right ascension
‘dec_proper_motion’	deg/year	The proper motion for the declination
‘mag’	N/A	The apparent magnitude of the star according to the star catalog
‘ra_sigma’	deg	The formal uncertainty in the right ascension according to the catalog
‘dec_sigma’	deg	The formal uncertainty in the declination according to the catalog
‘distance_sigma’	km	The formal uncertainty in the distance according to the catalog (converted from parallax). This has a default value of 1.9949433041226756e+19 km for stars with no parallax information.
‘ra_pm_sigma’	deg/year	The formal uncertainty in the right ascension proper motion according to the catalog
‘dec_pm_sigma’	deg/year	The formal uncertainty in the declination proper motion according to the catalog
‘epoch’	MJD year	The current epoch of the ra/dec/proper motion as a float