set default columns for RC query

        except:

            return False

    def dfs_rc_query(self, ra=180, dec=0, radius=2, min_mag=0, max_mag=30, obstime=-1, limit=-1):

    def dfs_rc_query(

            self,

            ra=180,

            dec=0,

            radius=2,

            columns=(

                    'ref_epoch',

                    'ra',

                    'ra_error',

                    'dec',

                    'dec_error',

                    'parallax',

                    'parallax_error',

                    'pmra',

                    'pmra_error',

                    'pmdec',

                    'pmdec_error',

                    'phot_g_mean_mag',

                    'source_id'

            ),

            min_mag=0,

            max_mag=30,

            obstime=-1,

            limit=-1

    ):

        """ Query Reference Catalog (RC) from DFS. """

        try:

            cat = self.dfs_CatApi.catalog_query(

                catalog_name="gaia3", ra=ra, dec=dec, radius=radius, min_mag=min_mag, max_mag=max_mag,

                obstime=obstime, limit=limit

                catalog_name="gaia3",

                ra=ra,

                dec=dec,

                columns=columns,

                radius=radius,

                min_mag=min_mag,

                max_mag=max_mag,

                obstime=obstime,

                limit=limit

            )

            tbl = self.dfs_CatApi.to_table(cat)

            return tbl