S arith.diff difference amplitude deviation offset correction P arith.factor factor exponent power-of correction scaling dilution P arith.grad gradient P arith.rate rate change S arith.ratio ratio relative normalized fraction decrement S arith.zp zero point scaling offset constant coefficient S em.IR infrared IR S em.IR.15-30um infrared 15-30 um S em.IR.3-4um infrared 3-4 um S em.IR.30-60um infrared 30-60 um S em.IR.4-8um infrared 4-8 um S em.IR.60-100um infrared 60-100 um S em.IR.8-15um infrared 8-15 um S em.IR.H H infrared S em.IR.J J infrared S em.IR.K K infrared S em.IR.K.Brgamma Bracket gamma line S em.UV ultraviolet UV S em.UV.10-50nm UV 10-50 nm S em.UV.100-200nm UV 100-200 nm S em.UV.200-300nm UV 200-300 nm S em.UV.50-100nm UV 50-100 nm S em.X-ray X-ray 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 wave Q em.freq frequency wave S em.gamma.hard hard gamma ray S em.gamma.soft soft gamma ray S em.mm.100-200GHz millimeter 100-200 GHz S em.mm.1500-3000GHz millimeter 1500-3000 GHz S em.mm.200-400GHz millimeter 200-400 GHz S em.mm.30-50GHz millimeter 30-50 GHz S em.mm.400-750GHz millimeter 400-750 GHz S em.mm.50-100GHz millimeter 50-100 GHz S em.mm.750-1500GHz millimeter 750-1500 GHz S em.opt optical S em.opt.B B optical 400-500nm S em.opt.B.Hbeta H-beta S em.opt.I I optical 750-1000um S em.opt.R R optical 600-7500um S em.opt.R.Halpha H-alpha S em.opt.U U optical 300-400um Balmer jump S em.opt.V V optical 500-600nm S em.opt.V.OIII [OIII] S em.radio radio S em.radio.100-200MHz radio 100-200 MHz S em.radio.12-30GHz radio 12-30 GHz S em.radio.1500-3000MHz radio 1500-3000 GHz S em.radio.20-100MHz radio 20-100 MHz S em.radio.200-400MHz radio 200-400 MHz S em.radio.3-6GHz radio 3-6 GHz S em.radio.400-750MHz radio 400-750 MHz S em.radio.6-12GHz radio 6-12 GHz S em.radio.750-1500MHz radio 750-1500 MHz 21cm Q em.wl wavelength wave Q em.wl.central central median 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 background of instrument Q instr.bandpass bandpass passband of instrument Q instr.bandwidth bandwidth fwhm width range instrument filter Q instr.baseline baseline interferometry Q instr.beam-width beam width size Q instr.calib calibration Q instr.det detector Q instr.det.noise noise of detector instrument Q instr.det.psf psf point spread function Q instr.det.qe quantum efficiency Q instr.filter filter Q instr.filter.transm transmission response Q instr.fov field of view angular aperture S instr.obsty observatory satellite mission Q instr.obsty.site telescope location (site, altitude) Q instr.obsty.site.seeing seeing Q instr.offset off-axis drift offset angle Q instr.param instrument parameter Q instr.pixel pixel Q instr.plate plate photographic Q instr.plate.emulsion plate emulsion Q instr.precision precision instrument Q instr.saturation saturation threshold detection Q instr.scale scale instrument Q instr.sensitivity sensitivity threshold detection Q instr.setup configuration setup instrument Q instr.sky-level sky level Q instr.sky-temp sky temperature Q instr.spect spectrograph Q instr.spect.dispersion dispersion scale spectrograph Q instr.spect.order spectral order Q instr.spect.resolution spectral resolution resolving power velocity S instr.tel telescope Q instr.tel.focus focus focal length telescope P meta.bib bibliographic reference publication article paper P meta.bib.author author name P meta.bib.bibcode bibcode bibliographic code P meta.bib.fig figure P meta.bib.journal journal name P meta.bib.page page number P meta.bib.volume volume number P meta.code code flag type P meta.code.class classification P meta.code.member membership P meta.code.mime MIME type P meta.code.multip multiplicity binarity P meta.code.qual quality code P meta.cryptic unknown or impossible to understand S meta.dataset dataset Q meta.file file S meta.fits fits Q meta.fits.software software used in generating FITS file P meta.id identifier name designation number P meta.id.assoc associated counterpart P meta.id.cross cross identification P meta.id.parent parent member identification of source S meta.main main principal S meta.modelled quantity was produced by a model P meta.note note remark P meta.number number (of things) P meta.record record number running number P meta.ref reference source origin Q meta.ref.url URL, web address Q meta.table table catalogue Q meta.table.axis axis table P meta.title title or explanation P meta.unit units Q obs observation Q obs.air.extinction atmospheric extinction Q obs.air.mass airmass air mass Q obs.field field zone sky region frame map plate area Q obs.image image Q obs.observer PI observer discoverer Q obs.param parameter observation reduction analysis Q phot photometry Q phot.calib calibration photometric Q phot.color color index magnitude difference Q phot.color.B-R B-R color Q phot.color.B-R.JHN B-R Johnson color Q phot.color.B-V B-V color Q phot.color.B-V.JHN B-V Johnson color Q phot.color.B1-B.gen B1-B Geneva color Q phot.color.B2-B.gen B2-B Geneva color Q phot.color.G-B.gen G-B Geneva color Q phot.color.H-K H-K color Q phot.color.J-H J-H color Q phot.color.J-K J-K color Q phot.color.K-L K-L color Q phot.color.R-I.JHN R-I Johnson color Q phot.color.U-B U-B color Q phot.color.U-B.JHN U-B Johnson color Q phot.color.U-B.gen U-B Geneva color Q phot.color.U-V.JHN U-V Johnson color Q phot.color.V-B.gen V-B Geneva color Q phot.color.V-I.cous V-I Cousins color Q phot.color.V-R.JHN V-R Johnson color Q phot.color.V-R.cous V-R Cousins color Q phot.color.V1-B.gen V1-B Geneva color Q phot.color.b-y.STR b-y Stroemgren color Q phot.color.c1.STR c1 Stroemgren color Q phot.color.excess color excess Q phot.color.g-r.gunn g-r Gunn color Q phot.color.m1.STR m1 Stroemgren Q phot.color.opt-ir optical infrared color Q phot.color.opt-uv optical UV color Q phot.color.reddFree dereddened reddening-free color Q phot.count flux expressed in counts(/s) Q phot.fluence fluence Q phot.flux flux Q phot.flux.bol bolometric flux Q phot.fluxDens density monochromatic flux continuum Jy, W/m2 per wl/freq/energy interval Q phot.fluxDens.sb flux density surface brightness Q phot.limbDark limb-darkening Q phot.mag magnitude Q phot.mag.bc bolometric correction Q phot.mag.bol bolometric magnitude Q phot.mag.distMod distance modulus Q phot.mag.reddFree reddening-free dereddened Q phot.mag.sb surface brightness magnitude Q phot.sb surface brightness Q phys.SFR SFR star formation rate Q phys.absorption extinction absorption Q phys.absorption.coeff absorption extinction opacity coefficient Q phys.absorption.gal galactic extinction absorption Q phys.absorption.gf gaunt factors Q phys.absorption.opticalDepth optical depth tau Q phys.abund abundance Q phys.abund.Fe metallicity 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 reflectance Q phys.angMomentum angular momentum Q phys.at atomic Q phys.at.coll collisional atomic Q phys.at.coll.rate collisional emissivity excitation rate Q phys.at.coll.strength collisional strength Q phys.at.crossSect atomic cross-section Q phys.at.damping damping van der Waals Q phys.at.element atomic element Q phys.at.energy atomic energy Q phys.at.energy.ioniz ionization energy potential Q phys.at.energy.level energy level excitation transition potential energy Q phys.at.fs fine structure Q phys.at.ion ionization stage Q phys.at.level level electronic configuration identification designation Q phys.at.level.lifetime radiative lifetime Q phys.at.level.parity parity Q phys.at.level.sweight statistical weight Q phys.at.line atomic line Q phys.at.line.emissivity atomic line emissivity Q phys.at.line.strength atomic line strength Q phys.at.number atomic number Z Q phys.at.osc-strength oscillator strength gf f Q phys.at.qn quantum number atomic structure Q phys.at.recombin recombination Q phys.at.stark stark broadening intensity Q phys.at.trans atomic transition Q phys.at.trans.energy transition energy wavenumber Q phys.at.trans.prob atomic transition probability Q phys.at.trans.rate rate of transition Q phys.at.trans.wl wavelength of transition Q phys.at.weight atomic weight Q phys.columnDensity column density Q phys.density density mass number electron energy surface Q phys.dielectric dielectric Q phys.dispMeas dispersion measure Q phys.distance distance Q phys.distance.compon component distance Q phys.distance.gc galactocentric distance Q phys.electField electric field Q phys.electron.degen degeneracy electron eta Q phys.electron.energy energy electron Q phys.emissMeasure emission measure Q phys.emissivity emissivity Q phys.energy energy thermal integrated component loss Q phys.eos equation of state EOS Q phys.excitParam excitation parameter U Q phys.extension extension size area angular width diameter Q phys.gravity gravity surface 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 outflow transfer rate flux Q phys.massYield mass yield Q phys.mol molecular data Q phys.mol.dipole dipole molecular electric Q phys.mol.energy energy molecular state dissociation Q phys.mol.energy.rotat rotational energy molecular Q phys.mol.formation.heat heat formation Q phys.mol.level level molecular Q phys.mol.line.strength line strength molecular Q phys.mol.qn quantum number molecular structure Q phys.mol.trans transition molecular Q phys.polarization polarization Q phys.polarization.posAng orientation angle polarization Q phys.polarization.rotMeas rotation polarization Q phys.polarization.stokes stokes polarization Q phys.pressure pressure Q phys.refraction refraction Q phys.size size length height dimension aperture diameter Q phys.size.area area of an object 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 Q pos.ang angular distance Q pos.ang.separation separation distance offset angular Q pos.az alt-azimutal Q pos.az.alt altitude elevation alt-azimutal Q pos.az.ha hour-angle elongation azimuth Q pos.az.zd zenith distance Q pos.barycenter barycenter Q pos.det position on instrument detector CCD pixel Q pos.dirCos direction cosine vector Q pos.earth.lat latitude on Earth Q pos.earth.lon longitude on Earth Q pos.earth.nutation Earth nutation Q pos.ec.lat ecliptic latitude Q pos.ec.lon ecliptic longitude Q pos.ee ellipse positional error Q pos.ephem ephemeris Q pos.eq equatorial coordinates Q pos.eq.dec declination dec equatorial Q pos.eq.dec.arcsec arcsec declination Q pos.eq.ra right ascension ra equatorial Q pos.eq.ra.minutes minutes right ascension Q pos.eq.ra.seconds seconds right ascension Q pos.frame Reference frame used for positions Q pos.gal galactic coordinates Q pos.gal.compon component galactic coordinates cartesian Q pos.gal.lat latitude in galactic coordinates Q pos.gal.lon longitude in galactic coordinates Q pos.lunar.occult occultation lunar limb Q pos.parallax parallax Q pos.parallax.dyn dynamical parallaxes Q pos.parallax.phot photometric parallaxes Q pos.parallax.spect spectroscopic parallaxes Q pos.parallax.trig trigonometric parallaxes Q pos.pm proper motion Q pos.pm.dec proper motion in declination pmdec Q pos.pm.ra proper motion in right ascension pmra Q pos.posAng position angle vector Q pos.precess precession Q pos.precess.dec precession in declination Q pos.precess.ra precession in right ascension Q pos.proj projection coordinates position Q pos.sg.compon rectangular cartesian supergalactic coordinates Q pos.sg.lat latitude in supergalactic coordinates Q pos.sg.lon longitude in supergalactic coordinates 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.doppler Doppler parameter b Q spect.index spectral index Q spect.index.Halpha H-alpha spectral index Q spect.index.Hbeta H-beta spectral index Q spect.index.Hgamma H-gamma spectral index Q spect.line spectral line Q spect.line.asymmetry asymmetry line Q spect.line.broad broadening spectral line Q spect.line.broad.Zeeman Zeeman broadening Q spect.line.eqwidth equivalent width line Q spect.line.intensity intensity line strength temperature Q spect.line.profile profile line Q spect.line.veloc radial velocity spectral line Q spect.line.width width fwhm moment spectral line S src source Q src.class classification type code Q src.class.color color classification source 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 classification Q src.class.struct structure classification bautz-morgan Q src.density density surface sources counts Q src.ellipticity ellipticity Q src.fwhm fwhm angular size full width at half maximum Q src.impactParam impact parameter Q src.morph morphology structure Q src.morph.param morphological parameter code bar spiral arm structure Q src.morph.scLength scale length for a galactic component (disc or bulge) Q src.morph.type morphological type Hubble galaxies Q src.orbital orbital Q src.orbital.eccentricity eccentricity orbital Q src.orbital.energy energy orbital Q src.orbital.inclination inclination angle orbit Q src.orbital.meanAnomaly mean anomaly orbital Q src.orbital.node node ascending longitude orbital Q src.orbital.periastron periastron Q src.orbital.separation separation orbital components Q src.orbital.size size orbit major axis Q src.orbital.veloc velocity orbital Q src.redshift redshift Q src.sample sample Q src.separation separation sources Q src.spType spectral type MK Q src.var variability source Q src.var.amplitude amplitude variation Q src.var.index index variability Q src.var.pulse pulse Q src.veloc velocity radial Q src.veloc.ang angular velocity, drift motion of a source Q src.veloc.cmb CMB velocity Q src.veloc.compon component velocity Q src.veloc.dispersion dispersion velocity 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 Rest radial velocity Q src.veloc.microTurb micro-turbulence microturbulence velocity Q src.veloc.pulsat pulsational velocity Q src.veloc.rotat rotational velocity Q stat statistical Q stat.Fourier Fourier coefficient Q stat.Fourier.amplitude amplitude Fourier coefficient P stat.covariance Covariance between two parameters P stat.error error Q stat.fit fit Q stat.fit.chi2 chi2 chi reduced Q stat.fit.dof degrees freedom fit Q stat.fit.goodness goodness significance probability fit Q stat.fit.omc difference observed measured minus computed theoretical model Q stat.fit.param parameter model fit correlation Q stat.fit.residual residual fit Q stat.likelihood likelihood S stat.max maximum upper max limit S stat.mean mean average S stat.median median S stat.min minimum lowest min limit Q stat.param parameter model P stat.snr signal to noise ratio P stat.stdev standard deviation rms sigma Q stat.value miscellaneous value P stat.variance variance second order moment P stat.weight statistical weight Q time time Q time.age age evolutionary time Q time.crossing crossing time Hubble Q time.epoch epoch julian date time UT Q time.equinox equinox Q time.expo exposure time integrated elapsed total corrected cumulative Q time.expo.end end exposure observation Q time.expo.start start exposure observation Q time.interval interval duration time Q time.period period cycle Q time.phase phase Q time.relax relaxation time Q time.resolution time resolution Q time.scale scale of time timescale