Q|arith |Arithmetic quantities S|arith.diff |Difference between two quantities described by the same UCD P|arith.factor |Numerical factor P|arith.grad |Gradient P|arith.rate |Rate (per time unit) S|arith.ratio |Ratio between two quantities described by the same UCD Q|arith.zp |Zero point S|em |Electromagnetic spectrum S|em.IR |Infrared part of the spectrum S|em.IR.15-30um |Infrared between 15 and 30 micron S|em.IR.3-4um |Infrared between 3 and 4 micron S|em.IR.30-60um |Infrared between 30 and 60 micron S|em.IR.4-8um |Infrared between 4 and 8 micron S|em.IR.60-100um |Infrared between 60 and 100 micron S|em.IR.8-15um |Infrared between 8 and 15 micron S|em.IR.FIR |Far-Infrared, 30-100 microns S|em.IR.H |Infrared between 1.5 and 2 micron S|em.IR.J |Infrared between 1.0 and 1.5 micron S|em.IR.K |Infrared between 2 and 3 micron S|em.IR.MIR |Medium-Infrared, 5-30 microns S|em.IR.NIR |Near-Infrared, 1-5 microns S|em.UV |Ultraviolet part of the spectrum S|em.UV.10-50nm |Ultraviolet between 10 and 50 nm S|em.UV.100-200nm |Ultraviolet between 100 and 200 nm S|em.UV.200-300nm |Ultraviolet between 200 and 300 nm S|em.UV.50-100nm |Ultraviolet between 50 and 100 nm S|em.UV.FUV |Far-Ultraviolet S|em.X-ray |X-ray part of the spectrum S|em.X-ray.hard |Hard X-ray (12 - 120 keV) S|em.X-ray.medium |Medium X-ray (2 - 12 keV) S|em.X-ray.soft |Soft X-ray (0.12 - 2 keV) Q|em.bin |Channel / instrumental spectral bin coordinate (bin number) Q|em.energy |Energy value in the em frame Q|em.freq |Frequency value in the em frame S|em.gamma |Gamma rays part of the spectrum S|em.gamma.hard |Hard gamma ray (>500 keV) S|em.gamma.soft |Soft gamma ray (120 - 500 keV) S|em.line |Designation of major atomic lines S|em.line.HI |21cm hydrogen line S|em.line.Brgamma |Bracket gamma line S|em.line.Halpha |H-alpha line S|em.line.Hbeta |H-beta line S|em.line.Hgamma |H-gamma line S|em.line.Hdelta |H-delta line S|em.line.Lyalpha |H-Lyalpha line S|em.line.OIII |[OIII] line whose rest wl is 500.7 nm S|em.line.CO |CO radio line, e.g. 12CO(1-0) rest wl 115GHz S|em.mm |Millimetric part of the spectrum S|em.mm.100-200GHz |Millimetric between 100 and 200 GHz S|em.mm.1500-3000GHz |Millimetric between 1500 and 3000 GHz S|em.mm.200-400GHz |Millimetric between 200 and 400 GHz S|em.mm.30-50GHz |Millimetric between 30 and 50 GHz S|em.mm.400-750GHz |Millimetric between 400 and 750 GHz S|em.mm.50-100GHz |Millimetric between 50 and 100 GHz S|em.mm.750-1500GHz |Millimetric between 750 and 1500 GHz S|em.opt |Optical part of the spectrum S|em.opt.B |Optical band between 400 and 500 nm S|em.opt.I |Optical band between 750 and 1000 nm S|em.opt.R |Optical band between 600 and 750 nm S|em.opt.U |Optical band between 300 and 400 nm S|em.opt.V |Optical band between 500 and 600 nm S|em.radio |Radio part of the spectrum S|em.radio.100-200MHz |Radio between 100 and 200 MHz S|em.radio.12-30GHz |Radio between 12 and 30 GHz S|em.radio.1500-3000MHz |Radio between 1500 and 3000 MHz S|em.radio.20-100MHz |Radio between 20 and 100 MHz S|em.radio.200-400MHz |Radio between 200 and 400 MHz S|em.radio.3-6GHz |Radio between 3 and 6 GHz S|em.radio.400-750MHz |Radio between 400 and 750 MHz S|em.radio.6-12GHz |Radio between 6 and 12 GHz S|em.radio.750-1500MHz |Radio between 750 and 1500 MHz Q|em.wavenumber |Wavenumber value in the em frame Q|em.wl |Wavelength value in the em frame Q|em.wl.central |Central wavelength Q|em.wl.effective |Effective wavelength Q|instr |Instrument E|instr.background |Instrumental background Q|instr.bandpass |Bandpass (e.g.: band name) of instrument Q|instr.bandwidth |Bandwidth of the instrument Q|instr.baseline |Baseline for interferometry S|instr.beam |Beam Q|instr.calib |Calibration parameter S|instr.det |Detector Q|instr.det.noise |Instrument noise Q|instr.det.psf |Point Spread Function Q|instr.det.qe |Quantum efficiency Q|instr.dispersion |Dispersion of a spectrograph S|instr.filter |Filter S|instr.fov |Field of view S|instr.obsty |Observatory, satellite, mission Q|instr.obsty.seeing |Seeing Q|instr.offset |Offset angle respect to main direction of observation Q|instr.order |Spectral order in a spectrograph Q|instr.param |Various instrumental parameters S|instr.pixel |Pixel (default size: angular) S|instr.plate |Photographic plate Q|instr.plate.emulsion |Plate emulsion Q|instr.precision |Instrument precision Q|instr.saturation |Instrument saturation threshold Q|instr.scale |Instrument scale (for CCD, plate, image) Q|instr.sensitivity |Instrument sensitivity, detection threshold Q|instr.setup |Instrument configuration or setup Q|instr.skyLevel |Sky level Q|instr.skyTemp |Sky temperature Q|instr.tel |Telescope Q|instr.tel.focalLength |Telescope focal length P|meta |Metadata P|meta.abstract |Abstract (of paper, proposal,etc.) P|meta.bib |Bibliographic reference P|meta.bib.author |Author name P|meta.bib.bibcode |Bibcode P|meta.bib.fig |Figure in a paper P|meta.bib.journal |Journal name P|meta.bib.page |Page number P|meta.bib.volume |Volume number P|meta.code |Code or flag P|meta.code.class |Classification code P|meta.code.error |limit uncertainty error flag P|meta.code.member |Membership code P|meta.code.mime |MIME type P|meta.code.multip |Multiplicity or binarity flag P|meta.code.qual |Quality, precision, reliability flag or code P|meta.code.status |Status code (e.g.: status of a proposal/observation) P|meta.cryptic |Unknown or impossible to understand quantity P|meta.curation |Identity of man/organization responsible for the data Q|meta.dataset |Dataset Q|meta.email |Curation/contact e-mail S|meta.file |File S|meta.fits |FITS standard P|meta.id |Identifier, name or designation P|meta.id.assoc |Identifier of associated counterpart P|meta.id.CoI |Name of Co-Investigator P|meta.id.cross |Cross identification P|meta.id.parent |Identification of parent source P|meta.id.part |Part of identifier, suffix or sub-component P|meta.id.PI |Name of Principal Investigator S|meta.main |Main value of something S|meta.modelled |Quantity was produced by a model P|meta.note |Note or remark (longer than a code or flag) P|meta.number |Number (of things; e.g. nb of object in an image) P|meta.record |Record number P|meta.ref |Reference, or origin Q|meta.ref.ivorn |IVORN, Int. VO Resource Name (ivo://) Q|meta.ref.uri |URI, universal resource identifier P|meta.ref.url |URL, web address S|meta.software |Software used in generating data S|meta.table |Table or catalogue P|meta.title |Title or explanation Q|meta.ucd |UCD P|meta.unit |Unit P|meta.version |Version S|obs |Observation Q|obs.airMass |Airmass S|obs.atmos |Atmosphere, atmospheric phenomena affecting an observation Q|obs.atmos.extinction |Atmospheric extinction Q|obs.atmos.refractAngle |Atmospheric refraction angle S|obs.calib |Calibration observation S|obs.calib.flat |Related to flat-field calibration observation (dome, sky, ..) S|obs.exposure |Exposure S|obs.field |Region covered by the observation S|obs.image |Image Q|obs.observer |Observer, discoverer Q|obs.param |Various observation or reduction parameter S|obs.proposal |Observation proposal Q|obs.proposal.cycle |Proposal cycle S|obs.sequence |Sequence of observations, exposures or events E|phot |Photometry E|phot.antennaTemp |Antenna temperature Q|phot.calib |Photometric calibration C|phot.color |Color index or magnitude difference Q|phot.color.excess |color excess Q|phot.color.reddFree |Dereddened color E|phot.count |Flux expressed in counts E|phot.fluence |fluence E|phot.flux |Photon flux Q|phot.flux.bol |Bolometric flux E|phot.flux.density |Flux density (per wl/freq/energy interval) E|phot.flux.density.sb |Flux density surface brightness E|phot.flux.sb |Flux surface brightness E|phot.limbDark |Limb-darkening coefficients E|phot.mag |Photometric magnitude E|phot.mag.bc |Bolometric correction Q|phot.mag.bol |Bolometric magnitude Q|phot.mag.distMod |Distance modulus E|phot.mag.reddFree |Dereddened magnitude E|phot.mag.sb |Surface brightness in magnitude units Q|phys |Physical quantities Q|phys.SFR |Star formation rate E|phys.absorption |Extinction or absorption along the line of sight Q|phys.absorption.coeff |Absorption coefficient (e.g. in a spectral line) Q|phys.absorption.gal |Galactic extinction Q|phys.absorption.opticalDepth |Optical depth Q|phys.abund |Abundance Q|phys.abund.Fe |Fe/H abundance Q|phys.abund.X |Hydrogen abundance Q|phys.abund.Y |Helium abundance Q|phys.abund.Z |Metallicity abundance Q|phys.acceleration |Acceleration Q|phys.albedo |Albedo or reflectance Q|phys.angArea |Angular area Q|phys.angMomentum |Angular momentum E|phys.angSize |Angular size width diameter dimension extension major minor axis extraction radius E|phys.angSize.smajAxis |angular size extent or extension of semi-major axis E|phys.angSize.sminAxis |angular size extent or extension of semi-minor axis Q|phys.area |Area (in linear units) S|phys.atmol |Atomic and molecular physics (shared properties) Q|phys.atmol.branchingRatio |Branching ratio Q|phys.atmol.collisional |Related to collisions Q|phys.atmol.collStrength |Collisional strength Q|phys.atmol.configuration |Configuration Q|phys.atmol.crossSection |Atomic / molecular cross-section Q|phys.atmol.element |Element Q|phys.atmol.excitation |Atomic molecular excitation parameter Q|phys.atmol.final |Quantity refers to atomic/molecular final/ground state, level, ecc. Q|phys.atmol.initial |Quantity refers to atomic/molecular initial state, level, ecc. Q|phys.atmol.ionStage |Ion, ionization stage S|phys.atmol.ionization |Related to ionization Q|phys.atmol.lande |Lande factor S|phys.atmol.level |Atomic level Q|phys.atmol.lifetime |Lifetime of a level Q|phys.atmol.lineShift |Line shifting coefficient Q|phys.atmol.number |Atomic number Z Q|phys.atmol.oscStrength |Oscillator strength Q|phys.atmol.parity |Parity Q|phys.atmol.qn |Quantum number Q|phys.atmol.radiationType |Type of radiation characterizing atomic lines (electric dipole/quadrupole, magnetic dipole) Q|phys.atmol.symmetry |Type of nuclear spin symmetry Q|phys.atmol.sWeight |Statistical weight Q|phys.atmol.sWeight.nuclear |Statistical weight for nuclear spin states Q|phys.atmol.term |Atomic term S|phys.atmol.transition |Transition between states Q|phys.atmol.transProb |Transition probability, Einstein A coefficient Q|phys.atmol.wOscStrength |Weighted oscillator strength Q|phys.atmol.weight |Atomic weight Q|phys.columnDensity |Column density S|phys.composition |Quantities related to composition of objects Q|phys.composition.massLightRatio |Mass to light ratio Q|phys.composition.yield |Mass yield S|phys.cosmology |Related to cosmology Q|phys.damping |Generic damping quantities Q|phys.density |Density (of mass, electron, ...) Q|phys.dielectric |Complex dielectric function Q|phys.dispMeasure |Dispersion measure V|phys.electField |Electric field S|phys.electron |Electron Q|phys.electron.degen |Electron degeneracy parameter Q|phys.emissMeasure |Emission measure Q|phys.emissivity |Emissivity Q|phys.energy |Energy Q|phys.energy.density |Energy-density Q|phys.entropy |Entropy Q|phys.eos |Equation of state Q|phys.excitParam |Excitation parameter U Q|phys.gauntFactor |Gaunt factor/correction Q|phys.gravity |Gravity Q|phys.ionizParam |Ionization parameter Q|phys.ionizParam.coll |Collisional ionization Q|phys.ionizParam.rad |Radiative ionization E|phys.luminosity |Luminosity Q|phys.luminosity.fun |Luminosity function E|phys.magAbs |Absolute magnitude Q|phys.magAbs.bol |Bolometric absolute magnitude V|phys.magField |Magnetic field Q|phys.mass |Mass Q|phys.mass.loss |Mass loss Q|phys.mol |Molecular data Q|phys.mol.dipole |Molecular dipole Q|phys.mol.dipole.electric |Molecular electric dipole moment Q|phys.mol.dipole.magnetic |Molecular magnetic dipole moment Q|phys.mol.dissociation |Molecular dissociation Q|phys.mol.formationHeat |Formation heat for molecules Q|phys.mol.quadrupole |Molecular quadrupole Q|phys.mol.quadrupole.electric |Molecular electric quadrupole moment S|phys.mol.rotation |Molecular rotation S|phys.mol.vibration |Molecular vibration S|phys.particle.neutrino |Related to neutrino E|phys.polarization |Polarization degree (or percentage) Q|phys.polarization.circular |Circular polarization Q|phys.polarization.linear |Linear polarization Q|phys.polarization.rotMeasure |Rotation measure polarization Q|phys.polarization.stokes |Stokes polarization Q|phys.pressure |Pressure Q|phys.recombination.coeff |Recombination coefficient Q|phys.refractIndex |Refraction index Q|phys.size |Linear size, length (not angular) Q|phys.size.axisRatio |Axis ratio (a/b) or (b/a) Q|phys.size.diameter |Diameter Q|phys.size.radius |Radius Q|phys.size.smajAxis |Linear semi major axis Q|phys.size.sminAxis |Linear semi minor axis Q|phys.temperature |Temperature Q|phys.temperature.effective |Effective temperature Q|phys.temperature.electron |Electron temperature Q|phys.transmission |Transmission (of filter, instrument, ...) V|phys.veloc |Space velocity Q|phys.veloc.ang |Angular velocity Q|phys.veloc.dispersion |Velocity dispersion Q|phys.veloc.escape |Escape velocity Q|phys.veloc.expansion |Expansion velocity Q|phys.veloc.microTurb |Microturbulence velocity Q|phys.veloc.orbital |Orbital velocity Q|phys.veloc.pulsat |Pulsational velocity Q|phys.veloc.rotat |Rotational velocity Q|phys.veloc.transverse |Transverse / tangential velocity Q|phys.virial |Related to virial quantities (mass, radius, ..) Q|pos |Position and coordinates Q|pos.angDistance |Angular distance, elongation Q|pos.angResolution |Angular resolution Q|pos.az |Position in alt-azimutal frame Q|pos.az.alt |Alt-azimutal altitude Q|pos.az.azi |Alt-azimutal azimut Q|pos.az.zd |Alt-azimutal zenith distance S|pos.barycenter |Barycenter S|pos.bodyrc |Body related coordinates Q|pos.bodyrc.alt |Body related coordinate (altitude on the body) Q|pos.bodyrc.lat |Body related coordinate (latitude on the body) Q|pos.bodyrc.long |Body related coordinate (longitude on the body) S|pos.cartesian |Cartesian (rectangular) coordinates Q|pos.cartesian.x |Cartesian coordinate along the x-axis Q|pos.cartesian.y |Cartesian coordinate along the y-axis Q|pos.cartesian.z |Cartesian coordinate along the z-axis S|pos.cmb |Cosmic Microwave Background reference frame Q|pos.dirCos |Direction cosine V|pos.distance |Linear distance S|pos.earth |Coordinates related to Earth Q|pos.earth.altitude |Altitude, height on Earth above sea level Q|pos.earth.lat |Latitude on Earth Q|pos.earth.lon |Longitude on Earth S|pos.ecliptic |Ecliptic coordinates Q|pos.ecliptic.lat |Ecliptic latitude Q|pos.ecliptic.lon |Ecliptic longitude S|pos.eop |Earth orientation parameters Q|pos.eop.nutation |Earth nutation Q|pos.ephem |Ephemeris S|pos.eq |Equatorial coordinates Q|pos.eq.dec |Declination in equatorial coordinates Q|pos.eq.ha |Hour-angle Q|pos.eq.ra |Right ascension in equatorial coordinates Q|pos.eq.spd |South polar distance in equatorial coordinates S|pos.errorEllipse |Positional error ellipse Q|pos.frame |Reference frame used for positions S|pos.galactic |Galactic coordinates Q|pos.galactic.lat |Latitude in galactic coordinates Q|pos.galactic.lon |Longitude in galactic coordinates S|pos.galactocentric |Galactocentric coordinate system S|pos.geocentric |Geocentric coordinate system Q|pos.healpix |Hierarchical Equal Area IsoLatitude Pixelization S|pos.heliocentric |Heliocentric position coordinate (solar system bodies) Q|pos.HTM |Hierarchical Triangular Mesh S|pos.lambert |Lambert projection S|pos.lg |Local Group reference frame S|pos.lsr |Local Standard of Rest reference frame Q|pos.lunar |Lunar coordinates Q|pos.lunar.occult |Occultation by lunar limb Q|pos.parallax |Parallax Q|pos.parallax.dyn |Dynamical parallax Q|pos.parallax.phot |Photometric parallaxes Q|pos.parallax.spect |Spectroscopic parallax Q|pos.parallax.trig |Trigonometric parallax Q|pos.phaseAng |Phase angle, e.g. elongation of earth from sun as seen from a third cel. object V|pos.pm |Proper motion Q|pos.posAng |Position angle of a given vector V|pos.precess |Precession (in equatorial coordinates) S|pos.supergalactic |Supergalactic coordinates Q|pos.supergalactic.lat |Latitude in supergalactic coordinates Q|pos.supergalactic.lon |Longitude in supergalactic coordinates P|pos.wcs |WCS keywords P|pos.wcs.cdmatrix |WCS CDMATRIX P|pos.wcs.crpix |WCS CRPIX P|pos.wcs.crval |WCS CRVAL P|pos.wcs.ctype |WCS CTYPE P|pos.wcs.naxes |WCS NAXES P|pos.wcs.naxis |WCS NAXIS P|pos.wcs.scale |WCS scale or scale of an image Q|spect |Spectroscopy Q|spect.binSize |Spectral bin size S|spect.continuum |Continuum spectrum Q|spect.dopplerParam |Doppler parameter b E|spect.dopplerVeloc |Radial velocity, derived from the shift of some spectral feature E|spect.dopplerVeloc.opt |Radial velocity derived from a wavelength shift using the optical convention E|spect.dopplerVeloc.radio |Radial velocity derived from a frequency shift using the radio convention E|spect.index |Spectral index S|spect.line |Spectral line E|spect.line.asymmetry |Line asymmetry E|spect.line.broad |Spectral line broadening Q|spect.line.broad.Stark |Stark line broadening coefficient E|spect.line.broad.Zeeman |Zeeman broadening E|spect.line.eqWidth |Line equivalent width E|spect.line.intensity |Line intensity E|spect.line.profile |Line profile Q|spect.line.strength |Spectral line strength S E|spect.line.width |Spectral line fwhm Q|spect.resolution |Spectral (or velocity) resolution S|src |Observed source viewed on the sky S|src.calib |Calibration source S|src.calib.guideStar |Guide star Q|src.class |Source classification (star, galaxy, cluster...) Q|src.class.color |Color classification Q|src.class.distance |Distance class e.g. Abell Q|src.class.luminosity |Luminosity class Q|src.class.richness |Richness class e.g. Abell Q|src.class.starGalaxy |Star/galaxy discriminator, stellarity index Q|src.class.struct |Structure classification e.g. Bautz-Morgan Q|src.density |Density of sources Q|src.ellipticity |Source ellipticity Q|src.impactParam |Impact parameter Q|src.morph |Morphology structure Q|src.morph.param |Morphological parameter Q|src.morph.scLength |Scale length for a galactic component (disc or bulge) Q|src.morph.type |Hubble morphological type (galaxies) S|src.net |Qualifier indicating that a quantity (e.g. flux) is background subtracted rather than total Q|src.orbital |Orbital parameters Q|src.orbital.eccentricity |Orbit eccentricity Q|src.orbital.inclination |Orbit inclination Q|src.orbital.meanAnomaly |Orbit mean anomaly Q|src.orbital.meanMotion |Mean motion Q|src.orbital.node |Ascending node Q|src.orbital.periastron |Periastron Q|src.redshift |Redshift Q|src.redshift.phot |Photometric redshift Q|src.sample |Sample Q|src.spType |Spectral type MK Q|src.var |Variability of source E|src.var.amplitude |Amplitude of variation Q|src.var.index |Variability index Q|src.var.pulse |Pulse Q|stat |Statistical parameters Q|stat.Fourier |Fourier coefficient Q|stat.Fourier.amplitude |Amplitude Fourier coefficient P|stat.correlation |Correlation between two parameters P|stat.covariance |Covariance between two parameters P|stat.error |Statistical error P|stat.error.sys |Systematic error Q|stat.filling |Filling factor (volume, time, ..) Q|stat.fit |Fit P|stat.fit.chi2 |Chi2 P|stat.fit.dof |Degrees of freedom P|stat.fit.goodness |Goodness or significance of fit S|stat.fit.omc |Observed minus computed Q|stat.fit.param |Parameter of fit P|stat.fit.residual |Residual fit P|stat.likelihood |Likelihood S|stat.max |Maximum or upper limit S|stat.mean |Mean, average value S|stat.median |Median value S|stat.min |Minimum or lowest limit Q|stat.param |Parameter Q|stat.probability |Probability P|stat.snr |Signal to noise ratio P|stat.stdev |Standard deviation S|stat.uncalib |Qualifier of a generic incalibrated quantity Q|stat.value |Miscellaneous value P|stat.variance |Variance P|stat.weight |Statistical weight Q|time |Time, generic quantity in units of time or date Q|time.age |Age Q|time.creation |Creation time/date (of dataset, file, catalogue,...) Q|time.crossing |Crossing time Q|time.duration |Interval of time describing the duration of a generic event or phenomenon Q|time.end |End time/date of a generic event Q|time.epoch |Instant of time related to a generic event (epoch, date, Julian date, time stamp/tag,...) Q|time.equinox |Equinox Q|time.interval |Time interval, time-bin, time elapsed between two events, not the duration of an event Q|time.lifetime |Lifetime Q|time.period |Period, interval of time between the recurrence of phases in a periodic phenomenon Q|time.phase |Phase, position within a period Q|time.processing |A time/date associated with the processing of data Q|time.publiYear |Publication year Q|time.relax |Relaxation time Q|time.release |The time/date data is available to the public Q|time.resolution |Time resolution Q|time.scale |Timescale Q|time.start |Start time/date of generic event