S 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 S 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.H Infrared H band S em.IR.J Infrared J band S em.IR.K Infrared K band 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.X-ray X-ray part of the spectrum S em.X-ray.hard Hard X-ray S em.X-ray.medium Medium X-ray S em.X-ray.soft Soft X-ray 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 S em.gamma.soft Soft gamma ray S em.line Designation of major atomic and molecular lines S em.line.21cm 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.OIII [OIII] line 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 B band between 400 and 500 nm S em.opt.I Optical I band between 750 and 1000 nm S em.opt.R Optical R band between 600 and 750 nm S em.opt.U Optical U band between 300 and 400 nm S em.opt.V Optical V 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 GHz 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 S instr Instrument Q instr.ang-res Angular resolution Q instr.antenna-temp Antenna temperature Q instr.area Collecting area of detector Q instr.background Instrumental background Q instr.bandpass Bandpass of instrument Q instr.bandwidth Bandwidth of the instrument Q instr.baseline Baseline for interferometry Q instr.beam-width Radio beam width 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 S instr.filter Filter Q instr.filter.transm Filter transmission Q instr.fov Field of view S instr.obsty Observatory satellite mission Q instr.obsty.site Observatory location Q instr.obsty.site.seeing Seeing Q instr.offset Offset angle respect to main direction of observation Q instr.param Various instrumental parameters S instr.pixel Pixel 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.sky-level Sky level Q instr.sky-temp Sky temperature S instr.spect Spectrograph Q instr.spect.dispersion Dispersion of spectrograph Q instr.spect.order Spectral order Q instr.spect.resolution Spectral resolution S instr.tel Telescope Q instr.tel.focus Telescope focus S meta Metadata 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.member Membership code P meta.code.mime MIME type P meta.code.multip Multiplicity or binarity flag P meta.code.qual Quality code P meta.cryptic Unknown or impossible to understand quantity S meta.dataset Dataset Q meta.file File S meta.fits FITS standard Q meta.fits.software Software used in generating FITS file P meta.id Identifier, name or designation P meta.id.assoc Identifier of associated counterpart P meta.id.cross Cross identification P meta.id.parent Identification of parent source 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.url URL, web address Q meta.table Table or catalogue Q meta.table.axis Table axis P meta.title Title or explanation P meta.ucd UCD P meta.unit Unit S obs Observation S obs.air Atmosphere Q obs.air.extinction Atmospheric extinction Q obs.air.mass Airmass Q obs.field Region covered by the observation Q obs.image Image Q obs.observer Observer, discoverer Q obs.param Various observation or reduction parameter S phot Photometry Q phot.calib Photometric calibration Q phot.color Color index or magnitude difference Q phot.color.Cous Color index in Cousins system Q phot.color.Gen Color index in Geneva system Q phot.color.Gunn Color index in Gunn system Q phot.color.JHN Color index in Johnson 65+ system Q phot.color.STR Color index in Stroemgren system Q phot.color.STR.c1 c1 Stroemgren color Q phot.color.STR.b-y b-y Stroemgren color Q phot.color.STR.m1 m1 Stroemgren Q phot.color.excess color excess Q phot.color.reddFree Dereddened color Q phot.count Flux expressed in counts(/s) Q phot.fluence fluence Q phot.flux Photon flux Q phot.flux.bol Bolometric flux Q phot.fluxDens Flux density (per wl/freq/energy interval) Q phot.fluxDens.sb Flux density surface brightness Q phot.limbDark Limb-darkening coefficients Q phot.mag Photometric magnitude Q phot.mag.bc Bolometric correction Q phot.mag.bol Bolometric magnitude Q phot.mag.distMod Distance modulus Q phot.mag.reddFree Dereddened magnitude Q phot.mag.sb Surface brightness magnitude Q phot.sb Surface brightness S phys Physical quantities Q phys.SFR Star formation rate Q phys.absorption Extinction or absorption Q phys.absorption.coeff Absorption coefficient Q phys.absorption.gal Galactic extinction Q phys.absorption.gf Gaunt factors 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.angMomentum Angular momentum S phys.at Atomic physics Q phys.at.branchingRatio Branching ratio Q phys.at.collStrength Collisional strength Q phys.at.crossSection Atomic cross-section Q phys.at.einstein Einstein coefficient Q phys.at.lande Lande factor S phys.at.level Atomic level Q phys.at.lineBroad Line broadening coefficient Q phys.at.lineShift Line shifting coefficient Q phys.at.moment Atomic momentum Q phys.at.moment.electric Electric momentum Q phys.at.moment.magnetic Magnetic momentum Q phys.at.number Atomic number Z Q phys.at.oscStrength Oscillator strength Q phys.at.qn Atomic quantum number Q phys.at.qn.I Nuclear spin quantum number Q phys.at.qn.S Electronic spin quantum number Q phys.at.qn.L Electronic L quantum number Q phys.at.qn.J Coupling of S and L qn Q phys.at.qn.F Coupling of J and I qn Q phys.at.term Atomic term Q phys.at.wOscStrength Weighted oscillator strength S phys.atmol Atomic and molecular physics (shared properties) S phys.atmol.coll Related to collisions Q phys.atmol.configuration Configuration S phys.atmol.element Element S phys.atmol.ion Ion S phys.atmol.ionization Related to ionization Q phys.atmol.parity Parity S phys.atmol.state.final Quantity refers to final state S phys.atmol.state.initial Quantity refers to initial state Q phys.atmol.sweight Statistical weight S phys.atmol.trans Transition between states Q phys.columnDensity Column density Q phys.density Density (of mass, electron, energy...) Q phys.dielectric Complex dielectric function Q phys.dispMeas Dispersion measure Q phys.distance Distance (not angular) Q phys.distance.compon Component of distance vector Q phys.distance.gc Galactocentric distance Q phys.electField Electric field S phys.electron Electron Q phys.electron.degen Electron degeneracy parameter Q phys.electron.energy Electron energy Q phys.emissMeasure Emission measure Q phys.emissivity Emissivity Q phys.energy Energy Q phys.eos Equation of state Q phys.excitParam Excitation parameter U Q phys.extension Angular extension, width, diameter Q phys.gravity Surface gravity Q phys.ionizParam Ionization parameter Q phys.ionizParam.coll Collisional ionization Q phys.ionizParam.rad Radiative ionization Q phys.luminosity Luminosity Q phys.luminosity.fun Luminosity function Q phys.magAbs Absolute magnitude Q phys.magAbs.bol Bolometric absolute magnitude Q phys.magField Magnetic field Q phys.mass Mass Q phys.mass.fraction Mass fraction Q phys.mass.light Mass to light ratio Q phys.mass.loss Mass loss Q phys.massYield Mass yield Q phys.mol Molecular data Q phys.mol.dipole Molecular dipole Q phys.mol.dipole.magnetic Magnetic molecular dipole Q phys.mol.dipole.electric Electric molecular dipole Q phys.mol.formationHeat Formation heat for molecules Q phys.mol.qn Molecular quantum numbers Q phys.mol.quadrupole Molecular quadrupole Q phys.mol.quadrupole.magnetic Magnetic molecular quadrupole Q phys.mol.quadrupole.electric Electric molecular quadrupole S phys.mol.rotation Molecular rotation S phys.mol.vibration Molecular vibration Q phys.polarization Polarization Q phys.polarization.posAng Polarization angle Q phys.polarization.rotMeas Rotation measure polarization Q phys.polarization.stokes Stokes polarization Q phys.pressure Pressure Q phys.refraction Refraction Q phys.size Size (not angular) Q phys.size.area Area Q phys.size.diameter Diameter Q phys.size.radius Radius Q phys.temperature Temperature Q phys.temperature.effective Effective temperature Q phys.temperature.electron Electron temperature Q pos Position and coordinates Q pos.ang Angular distance Q pos.ang.separation Angular separation Q pos.az Position in alt-azimutal frame Q pos.az.alt Alt-azimutal altitude Q pos.az.ha Alt-azimutal hour-angle Q pos.az.zd Alt-azimutal zenith distance S pos.barycenter Barycenter Q pos.det Position on instrument detector Q pos.dirCos Direction cosine S pos.earth Coordinates related to Earth Q pos.earth.lat Latitude on Earth Q pos.earth.lon Longitude on Earth Q pos.earth.nutation Earth nutation Q pos.ec Ecliptic coordinates Q pos.ec.lat Ecliptic latitude Q pos.ec.lon Ecliptic longitude Q pos.ee Position ellipse error Q pos.ephem Ephemeris Q pos.eq Equatorial coordinates Q pos.eq.dec Declination in equatorial coordinates Q pos.eq.dec.arcsec Arcsec of declination Q pos.eq.ra Right ascension in equatorial coordinates Q pos.eq.ra.minutes Minutes of right ascension Q pos.eq.ra.seconds Seconds of right ascension Q pos.frame Reference frame used for positions Q pos.gal Galactic coordinates Q pos.gal.compon Cartesian component of galactic coordinates Q pos.gal.lat Latitude in galactic coordinates Q pos.gal.lon Longitude in galactic coordinates 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.pm Proper motion Q pos.pm.dec Proper motion in declination Q pos.pm.ra Proper motion in right ascension Q pos.posAng Position angle Q pos.precess Precession Q pos.precess.dec Precession in declination Q pos.precess.ra Precession in right ascension Q pos.proj Projected coordinates Q pos.sg Supergalactic coordinates Q pos.sg.compon Cartesian component of supergalactic coordinates Q pos.sg.lat Latitude in supergalactic coordinates Q pos.sg.lon Longitude in supergalactic coordinates S 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 S spect Spectroscopy Q spect.doppler Doppler parameter b Q spect.index Spectral index S spect.line Spectral line Q spect.line.asymmetry Line asymmetry Q spect.line.broad Spectral line broadening Q spect.line.broad.Zeeman Zeeman broadening Q spect.line.eqwidth Line equivalent width Q spect.line.intensity Line intensity Q spect.line.profile Line profile Q spect.line.veloc Spectral line radial velocity Q spect.line.width Spectral line fwhm S src Source Q src.class Source classification (star, galaxy, cluster...) Q src.class.color Color classification Q src.class.distance Abell distance class Q src.class.luminosity Luminosity class Q src.class.richness Richness Abell class Q src.class.star-galaxy Star/galaxy discriminator Q src.class.struct Bautz-Morgan structure classification Q src.density Density of sources Q src.ellipticity Source ellipticity Q src.fwhm Source FWHM angular size 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) Q src.orbital Orbital parameters Q src.orbital.eccentricity Orbit eccentricity Q src.orbital.energy Orbital energy Q src.orbital.inclination Orbit inclination Q src.orbital.meanAnomaly Orbit mean anomaly Q src.orbital.node Ascending node Q src.orbital.periastron Periastron Q src.orbital.separation Separation between orbital components Q src.orbital.size Size of orbit major axis Q src.orbital.veloc Orbital velocity Q src.redshift Redshift Q src.sample Sample Q src.separation Separation between sources Q src.spType Spectral type MK Q src.var Variability of source Q src.var.amplitude Amplitude of variation Q src.var.index Variability index Q src.var.pulse Pulse Q src.veloc Radial velocity Q src.veloc.ang Angular velocity Q src.veloc.cmb CMB velocity Q src.veloc.compon Component velocity Q src.veloc.dispersion Velocity dispersion Q src.veloc.escape Escape velocity Q src.veloc.expansion Expansion velocity Q src.veloc.gc Galactocentric radial velocity Q src.veloc.geoc Geocentric radial velocity Q src.veloc.hc Heliocentric radial velocity Q src.veloc.lg Local Group radial velocity Q src.veloc.lsr Local Standard of Rest radial velocity Q src.veloc.microTurb Microturbulence velocity Q src.veloc.pulsat Pulsational velocity Q src.veloc.rotat Rotational velocity S stat Statistical parameters Q stat.Fourier Fourier coefficient Q stat.Fourier.amplitude Amplitude Fourier coefficient P stat.covariance Covariance between two parameters P stat.error Statistical error P stat.error.sys Systematic error Q stat.fit Fit Q stat.fit.chi2 Chi2 Q stat.fit.dof Degrees of freedom Q stat.fit.goodness Goodness or significance of fit Q stat.fit.omc Observed minus computed Q stat.fit.param Parameter of fit Q stat.fit.residual Residual fit Q 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 P stat.snr Signal to noise ratio P stat.stdev Standard deviation Q stat.value Miscellaneous value P stat.variance Variance P stat.weight Statistical weight Q time Time Q time.age Age Q time.crossing Crossing time Q time.epoch Epoch, julian date Q time.equinox Equinox Q time.expo Exposure time Q time.expo.end end exposure Q time.expo.start start exposure Q time.interval Interval Q time.period Period Q time.phase Phase Q time.relax Relaxation time Q time.resolution Time resolution Q time.scale Timescale