{
  "bibcodelist(y1-y2)": "number of references. The parameter is optional and limit the count to\nthe references between the years y1 and y2",
  "biblio": "all bibcodes of an astronomical object separated with a ipipe",
  "cel": "Celescope catalog of ultra-violet photometry",
  "cl.g": "Cluster of Galaxies: Abell & Corwin,Astrophys. J. Suppl.,70,1 (1989)",
  "coo(opt)": "d : decimal display\ns : sexagesimal display\nframe : ICRS, FK5, FK4, GAL, SGAL, ECL\nepoch : epoch (decimal value) for the coordinates display\nequinox : equinox (decimal value) for the coordinates display",
  "coo_bibcode": "bibliographical reference",
  "coo_err_angle": "angle of the error ellipse",
  "coo_err_maja": "major axis of the error ellipse",
  "coo_err_mina": "minor axis of the error ellipse",
  "coo_qual": "quality (A:astrometric, .., E:unknown)",
  "coo_wavelength": "wavelength type of the measure (Radio, IR, Visible, UV, X, Gamma)",
  "coordinates": "all fields related with coordinates",
  "dec(opt)": "declination. The options are the same as for coo above.",
  "dec_prec": "declination precision code (0:1/10deg, ..., 8: 1/1000 arcsec)",
  "diameter": "Stellar diameters, see 2001A&A...367..521P for an explanation of the coding \n              of the methods of measurements.",
  "dim": "main fields related to object dimensions: major and minor axis, angle and inclination",
  "dim_angle": "angle of the object",
  "dim_bibcode": "Bibliographical reference",
  "dim_incl": "inclination (unit of 15d: value from 0 to 6)",
  "dim_majaxis": "Major axis",
  "dim_minaxis": "Minor axis",
  "dim_qual": "quality (A: best, .., E: worst)",
  "dim_wavelength": "wavelength type in which these dimensions were measured (Radio, IR, Visible, UV, X, Gamma)",
  "dimensions": "all fields related to object dimensions",
  "distance": "Measure of distances by several means",
  "distance_result": "Angular distance from the center of the query (arcsec) (if relevant)",
  "einstein": "The Einstein Observatory Soft X-ray Source List",
  "fe_h": "Stellar parameters (Teff, log(g) and [Fe/H]) taken from the literature.",
  "flux(filtername)": "value of the flux for the given filter",
  "flux_bibcode(filtername)": "bibcode",
  "flux_error(filtername)": "error value of the flux measurement",
  "flux_name(filtername)": "name of the filter",
  "flux_qual(filtername)": "quality (A:best, E:worst) of the flux",
  "flux_system(filtername)": "flux unit (mag, jy, ...)",
  "flux_unit(filtername)": "flux unit (mag, jy, ...)",
  "fluxdata(filtername)": "all fields related with a particular filter.",
  "gcrv": "General Catalogue of Radial Velocities",
  "gen": "Geneva Photometric System Catalogue",
  "gj": "Gliese Jahreiss Nearby Stars (Catalog of stars within 20 parsecs of the Sun)",
  "hbet": "The Hbeta photometric system (Crawford and Mander,1966,Astron. J. 7,114)",
  "hbet1": "The Hbeta photometric system (Crawford and Mander,1966,Astron. J. 7,114)",
  "hgam": "Catalogue of equivalent width of Hgamma line from Petrie et al. (1973PDAO...14..151P)",
  "id(opt)": "1 : display the first (main identifier) of the object. Is the same as main_id\ncat : display the identifier from the given catalog. If it doesn't exist, the\n                  field is left empty\ncat1|cat2|...[|1] : display the identifier from the first catalog, or, if it doesn't exits\n                                the one from the second identifier and so on. If none is found, the\n\t\t\t\tfield is left empty, except if |1 closes the list: then the\n\t\t\t\tfirst identifier is used.",
  "ids": "all identifiers of an astronomical object separated with a ipipe",
  "iras": "InfraRed Astronomical Satellite Measurements extracted from the \nIRAS Point Source Catalog, 2nd Edition",
  "irc": "Infra-red measurements by Neugebauer and Leighton, Caltech, NASA, 1969",
  "iso": "Infrared Space Observatory (ISO) log",
  "iue": "International Ultraviolet Explorer",
  "jp11": "UBVRIJKLMNH Johnson s photometry",
  "link_bibcode": "Bibcode used to link the object in the hierarchy",
  "main_id": "main identifier of an astronomical object. It is the same as id(1)",
  "measurements": "display all fields from all measurements (291 fields)",
  "membership": "Hierarchy probability of membership",
  "mesplx": "Parallax measurements",
  "mespm": "compilation of measurements of stellar proper motions (except SAO catalogue).\n              These data are presently given at equinox and epoch 1950, in the FK4 system.",
  "mk": "MK classifications in the Morgan-Keenan system and \nthe Michigan Catalogues of Two-Dimensional Spectral Types for\nthe HD stars (Houk N.,1975,and seq.)",
  "morphtype": "all fields related to the morphological type",
  "mt": "morphological type value",
  "mt_bibcode": "Bibliographical reference",
  "mt_qual": "morphological type quality (A: best, .., E: worst)",
  "otype": "standard name of the object type",
  "otype(opt)": "N : numerical display\nS : standard name (max 6 chars)\n3 : short name (max 3 chars)\nV : full description",
  "otypes": "list of (secondary) object types for one object",
  "parallax": "all fields related to parallaxes",
  "plx": "parallax value",
  "plx_bibcode": "bibliographical reference",
  "plx_error": "parallax error",
  "plx_prec": "precision code (0:1/10deg, ..., 8: 1/1000 arcsec)",
  "plx_qual": "parallax quality (A:astrometric, .., E:unknown)",
  "pm": "proper motion values in right ascension and declination",
  "pm_bibcode": "bibliographical reference",
  "pm_err_angle": "angle of the error ellipse",
  "pm_err_maja": "major axis of the error ellipse",
  "pm_err_mina": "minor axis of the error ellipse",
  "pm_qual": "quality (A:astrometric, .., E:unknown)",
  "pmdec": "proper motion in declination",
  "pmdec_prec": "precision code (0:1/10deg, ..., 8: 1/1000 arcsec)",
  "pmra": "proper motion in right ascension",
  "pmra_prec": "precision code (0:1/10deg, ..., 8: 1/1000 arcsec)",
  "pos": "compilation of measurements of stellar positions (except SAO data)",
  "posa": "Measurements of Position (since June 1998)",
  "propermotions": "all fields related with the proper motions",
  "ra(opt)": "right ascension. The options are the same as for coo above.",
  "ra_prec": "right ascension precision code (0:1/10deg, ..., 8: 1/1000 arcsec)",
  "rot": "Stellar Rotational Velocities",
  "rv_value": "Radial velocity value. Eventually translated from a redshift",
  "rvz_bibcode": "Bibliographical reference",
  "rvz_error": "Error. In the same unit as rvz_radvel",
  "rvz_qual": "Quality code (A: best, .., E: worst)",
  "rvz_radvel": "stored value. Either a radial velocity, or a redshift,\ndepending on the rvz_type field",
  "rvz_type": "stored type of velocity: 'v'=radial velocity, 'z'=redshift",
  "rvz_wavelength": "wavelength type of the measure (Radio, IR, Visible, UV, X, Gamma)",
  "sao": "SAO catalogue (Star catalog of 258997 stars for the epoch and equinox 1950.0,1966)",
  "sp": "spectral type value",
  "sp_bibcode": "Bibliographical reference",
  "sp_nature": "spectral type nature ('s'pectroscopic, 'a'bsorbtion, 'e'mmission",
  "sp_qual": "spectral type quality (A: best, .., E: worst)",
  "sptype": "all fields related with the spectral type",
  "td1": "UV fluxes from TD1 satellite,by Thompson et al.",
  "typed_id": "identifier given by the user.",
  "ubv": "UBV data in Johnson's UBV system \n              compiled by J.-Cl. Mermilliod from Institut d Astronomie de Lausanne (1973A&AS...71..413M)",
  "uvby": "The Str\u00f6mgren uvby photometric system",
  "uvby1": "The Str\u00f6mgren uvby photometric system",
  "v*": "variable stars parameters extracted mainly from the \n              General Catalog of Variable Stars by Kukarkin et al.\n              USSR Academy of Sciences (3rd edition in 1969,and continuations)",
  "velocity": "all fields related with radial velocity and redshift",
  "xmm": "XMM log",
  "z_value": "Redshift value. Eventually translated from a radial velocity"
}