VII/289/dr16qThe SDSS quasar-only catalog from DR16 (DR16Q)e_pmDE[0/725]? pmDE uncertainty (GAIA_PM_DEC_ERR)mas/yrstat.error;pos.pm;pos.eq.decfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS-DR16 designation (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME)meta.id;meta.maincharprimaryRAJ2000Right Ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000[-17.53/84.44] Declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedPlateSpectroscopic plate number (G1)obs.fieldintMJD[51608/58543] Spectroscopic Modified Julian Date (G1)time.epochintindexedFiberSpectroscopic fiber number (FIBERID) (G1)meta.number;pos.parallax.spectintQNObject classification post-QuasarNET (Busca & Balland 2018arXiv180809955B) (AUTOCLASS_PQN) (1)meta.codecharDR14QObject classification based only on the DR14Q algorithm (AUTOCLASS_DR14Q)meta.code.class;src.classcharQQNBinary flag for QuasarNET quasar identification (1=QSO; -1=not processed by QuasarNET) (IS_QSO_QN)meta.codeintzQN[-0.4/6.51]? Redshift derived by QuasarNET (Z_QN)src.redshift;pos.heliocentricdoublenullable10K[0/1] Binary flag indicating objects selected for random visual inspection (0=not selected) (RANDOM_SELECT) (G2)meta.codeintz10K[0.1/4.3]? Redshift from visual inspection of random set (Z_10K)src.redshift;pos.heliocentricdoublenullablef_z10K[-1/3] Confidence rating for visual inspection redshift of random set (3:highest confidence) (Z_CONF_10K) (G3)meta.codeintC10KBinary flag indicating if the automated pipeline classification and redshift were correct in the random set (PIPE_CORR_10K) (G4)meta.codeintQ10KBinary flag for random set quasar identification (1=QSO; -1=not randomly selected) (IS_QSO_10K)meta.codeintTHINGID? SDSS identifier mainly for BOSS and eBOSS objects (THING_ID)meta.idlongnullablezvis[0.001/7.02]? Redshift from visual inspection (Z_VI)src.redshift;pos.heliocentricdoublenullablef_zvis[-1/3]? Confidence rating for visual inspection redshift (3: highest confidence) (Z_CONF)meta.codeintnullableClass[0/50]? Object classification from visual inspection (CLASS_PERSON) (2)meta.code.class;src.classintnullablezDR12Q[0.04/6.5]? Redshift taken from DR12Q (Cat. VII/279) visual inspection (Z_DR12Q)src.redshift;pos.heliocentricdoublenullableQDR12QFlag indicating if an object was a quasar in DR12Q (1=QSO) (IS_QSO_DR12Q)meta.codeintzDR7Q[0.06/5.47]? Redshift taken from DR7Q (Cat. VII/260) catalog (Z_DR7Q_SCH)src.redshift;pos.heliocentricfloatnullableQDR7QFlag indicating if an object was a quasar in DR7Q (IS_QSO_DR7Q)meta.codeintzDR6Q[0.07/5.5]? Redshift taken from DR6 (Hewett & Wild, 2010, J/MNRAS/405/2302) (Z_DR6Q_HW)src.redshift;pos.heliocentricdoublenullablezDR7Qa[0.06/5.5]? Redshift taken from DR7 (Shen+ 2011, J/ApJS/194/45) catalog ancillary columns (Z_DR7Q_HW) (G5)src.redshift;pos.heliocentricdoublenullableQSO[1/2] Flag indicating quasars included in final catalog (1=QSO; 2=questionable -- see Section 3.6) (IS_QSO_FINAL)meta.codeintz[-0.0027/7.03]? Best available redshiftsrc.redshift;pos.heliocentricdoublenullabler_zSource for redshift z (SOURCE_Z) (3)meta.ref;pos.framecharzPipe[-0.0084/7.05]? Redshift from SDSS pipeline version v5_13_0 (Z_PIPE)src.redshift;pos.heliocentricdoublenullableq_zPipe[-1/68] Quality flag on SDSS pipeline redshift estimate (ZWARNING) (G6)meta.code.qualintobjIDSDSS object identification number (sky version, run, rerun, camera column, field number, and ID) (G7)meta.idcharzPCA[-1008/7.3] PCA redshift derived by the redvsblue algorithm (Z_PCA)src.redshift;pos.heliocentricdoubleq_zPCA[0/1056] Warning flag for redvsblue redshift (ZWARN_PCA) (G6)meta.code.qualintChi2PCA[7/3.31e+7] {Delta}{chi}^2^ for PCA redshift versus cubic continuum fit (DELTACHI2_PCA)stat.fit.chi2doublezHa[-0.015/0.53]? PCA line redshift for H{alpha} from redvsblue (Z_HALPHA)src.redshift;pos.heliocentricdoublenullableExtu[0.009/3.8]? Galactic extinction in the u-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONu)magphys.absorptiondoublenullableq_zHa[0/7682] Warning flag for H{alpha} (ZWARN_HALPHA) (G6)meta.code.qualintChi2Ha[0/2.2e+6] {Delta}{chi}^2^ for H{alpha} line redshift versus cubic continuum fit (DELTACHI2_HALPHA)stat.fit.chi2doublezHb[-0.02/1.1]? PCA line redshift for H{beta} from redvsblue (Z_HBETA)src.redshift;pos.heliocentricdoublenullableq_zHb[0/7682] Warning flag for H{beta} (ZWARN_HBETA) (G6)meta.code.qualintChi2Hb[0/525536] {Delta}{chi}^2^ for H{beta} line versus cubic continuum fit (DELTACHI2_HBETA)stat.fit.chi2doublezMgII[0.28/2.6]? PCA line redshift for MgII from redvsblue (Z_MGII)src.redshift;pos.heliocentricdoublenullableq_zMgII[0/7682] Warning flag for MgII (ZWARN_MGII) (G6)meta.code.qualintChi2MgII[0/384079] {Delta}{chi}^2^ for MgII line redshift versus cubic continuum fit (DELTACHI2_MGII)stat.fit.chi2doublezCIII[0.8/4.3]? PCA line redshift for CIII] from redvsblue (Z_CIII)src.redshift;pos.heliocentricdoublenullableq_zCIII[0/7682] Warning flag for CIII] (ZWARN_CIII) (G6)meta.code.qualintChi2CIII[0/547655] {Delta}{chi}^2^ for CIII] line redshift versus cubic continuum fit (DELTACHI2_CIII)stat.fit.chi2doublezCIV[1.3/5.5]? PCA line redshift for CIV from redvsblue (Z_CIV)src.redshift;pos.heliocentricdoublenullableq_zCIV[0/7682] Warning flag for CIV (ZWARN_CIV) (G6)meta.code.qualintChi2CIV[0/5.5e+6] {Delta}{chi}^2^ for CIV line redshift versus cubic continuum fit (DELTACHI2_CIV)stat.fit.chi2doublezLyA[1.9/7.3]? PCA line redshift for Ly{alpha} from redvsblue (Z_LYA)src.redshift;pos.heliocentricdoublenullableq_zLyA[0/7682] Warning flag for Ly{alpha} (ZWARN_LYA) (G6)meta.code.qualintChi2LyA[0/4.5e+6] {Delta}{chi}^2^ for Ly{alpha} line redshift versus cubic continuum fit (DELTACHI2_LYA)stat.fit.chi2doublezLyaB[0.03/4]? PCA redshift derived from spectra masked blueward of Ly{alpha} (Z_LYAWG)src.redshift;pos.heliocentricdoublenullablezDLA1[1.9/6.2]? Redshift for damped Ly{alpha} feature 1 (Z_DLA1)src.redshift;pos.heliocentricdoublenullablezDLA2[2/5.2]? Redshift for damped Ly{alpha} feature 2 (Z_DLA2)src.redshift;pos.heliocentricdoublenullablezDLA3[2.1/4.9]? Redshift for damped Ly{alpha} feature 3 (Z_DLA3)src.redshift;pos.heliocentricdoublenullablezDLA4[2.4/3.7]? Redshift for damped Ly{alpha} feature 4 (Z_DLA4)src.redshift;pos.heliocentricdoublenullablezDLA5[2.8/3.3]? Redshift for damped Ly{alpha} feature 5 (Z_DLA5)src.redshift;pos.heliocentricdoublenullableNHIDLA1[20.3/22]? Absorber column density for damped Ly{alpha} feature 1 (NHI_DLA1)phys.columnDensitydoublenullableNHIDLA2[20.3/21.8]? Absorber column density for damped Ly{alpha} feature 2 (NHI_DLA2)phys.columnDensitydoublenullableNHIDLA3[20.3/21.4]? Absorber column density for damped Ly{alpha} feature 3 (NHI_DLA3)phys.columnDensitydoublenullableNHIDLA4[20.3/21.1]? Absorber column density for damped Ly{alpha} feature 4 (NHI_DLA4)phys.columnDensitydoublenullableNHIDLA5[20.5/20.6]? Absorber column density for damped Ly{alpha} feature 5 (NHI_DLA5)phys.columnDensitydoublenullablef_zDLA1Confidence of detection for damped Ly{alpha} feature 1 (CONF_DLA1)meta.codefloatf_zDLA2Confidence of detection for damped Ly{alpha} features (CONF_DLA2)meta.codefloatf_zDLA3Confidence of detection for damped Ly{alpha} features (CONF_DLA3)meta.codefloatf_zDLA4Confidence of detection for damped Ly{alpha} features (CONF_DLA4)meta.codefloatf_zDLA5Confidence of detection for damped Ly{alpha} features (CONF_DLA5)meta.codefloatPBAL[-1/1] BAL probability (BAL_PROB) (G8)stat.fit.goodnessdoubleBI(CIV)[/109061]? BALnicity index for the CIV region (BI_CIV)km/sspect.line.eqWidthdoublenullablee_BI(CIV)[0/3.1e+38]? BI(CIV) uncertainty (ERR_BI_CIV)km/sstat.errordoublenullableAI(CIV)[-618/121609]? Absorption index for the CIV region (AI_CIV)km/sspect.indexdoublenullablee_AI(CIV)[0/10897]? AI(CIV) uncertainty (ERR_AI_CIV)km/sstat.errordoublenullableBI(SIIV)[/85220]? BALnicity index for the SiIV region (BI_SIIV)km/sspect.line.eqWidthdoublenullablee_BI(SIIV)[0/1985]? BI(SIIV) uncertainty (ERR_BI_SIIV)km/sstat.errordoublenullableAI(SIIV)[/45671]? Absorption index for the SiIV region (AI_SIIV)km/sspect.indexdoublenullablee_AI(SIIV)[0/1622]? AI(SIIV) uncertainty (ERR_AI_SIIV)km/sstat.errordoublenullableBtarg1BOSS target selection flag for the main survey (BOSS_TARGET1)meta.codeHmag[12.2/18.2]? 2MASS (Vega) H-band magnitudemagphot.mag;em.IR.HfloatnullableeBOSST0eBOSS target selection flag for the pilot survey (SEQUELS) (EBOSS_TARGET0)meta.codeeBOSST1eBOSS target selection flag for the main survey (EBOSS_TARGET1)meta.codeeBOSST2eBOSS target 2 selection flag for the main survey (EBOSS_TARGET2)meta.codeAtarg1BOSS target selection flag for the ancillary surveys (ANCILLARY_TARGET1)meta.codeFNUV[-1.3/1235] NUV flux for GALEX in nMgy (NUV)3.63uJyphot.flux;em.UVdoubleAtarg2BOSS target 2 selection flag for the ancillary surveys (ANCILLARY_TARGET2) -------------------------------------------------------------------------------meta.codeNspI[0/1] Number of additional spectra from SDSS-I/II (NSPEC_SDSS) (G9)meta.numberintNspBOSS[0/73] Number of additional spectra from BOSS/eBOSS (NSPEC_BOSS) (G9)meta.numberintNsp[0/73] Total number of additional spectra (NSPEC) (G9)meta.numberintSky[2]? SDSS photometric sky version number (SKYVERSION)meta.numberintnullableRun[94/8162]? SDSS imaging run number of photometric measurements (RUN_NUMBER)meta.idintnullableRerun[157/301]? SDSS photometric processing rerun number (RERUN_NUMBER)meta.idintnullableCam[1/6]? SDSS camera column number (CAMCOL_NUMBER)meta.idintnullableField[11/872]? SDSS field number (FIELD_NUMBER)meta.id;obs.fieldintnullablephotID[2/4093]? SDSS photometric ID (ID_NUMBER)meta.id;photintnullablelambda[4000/7500] Wavelength for which the fiber placement was optimized to account for atmospheric differential refraction (Dawson+ 2013AJ....145...10D), in {AA} (LAMBDA_EFF)0.1nmem.wlintOffset[0/300] Backstopping offset distance (ZOFFSET)umpos.distance;instr.offset;arith.diffdoubleXfocal[-325/325] Hole x-axis position in focal planemmpos.cartesian.x;instr.platedoubleYfocal[-325/326] Hole y-axis position in focal planemmpos.cartesian.y;instr.platedoubleChunkName of tiling chunk (from the plate-list product)obs.fieldcharTile[-3/17691] Tile numberobs.fieldintSN2[0/334] Overall (S/N)^2^ measure for plate, minimum of all four cameras (PLATESN2)stat.snrdoubleFu[-45/2001]? PSF flux in u-band in nMgy (not corrected for Galactic extinction) (PSFFLUXu)3.63uJyphot.mag;em.opt.UdoublenullableFg[-0.3/1756]? PSF flux in g-band in nMgy (not corrected for Galactic extinction) (PSFFLUXg)3.63uJyphot.mag;em.opt.BdoublenullableFr[-0.6/1646]? PSF flux in r-band in nMgy (not corrected for Galactic extinction) (PSFFLUXr)3.63uJyphot.mag;em.opt.RdoublenullableFi[-31/2324]? PSF flux in i-band in nMgy (not corrected for Galactic extinction) (PSFFLUXi)3.63uJyphot.mag;em.opt.IdoublenullableFz[-3.2/1777]? PSF flux in z-band in nMgy (not corrected for Galactic extinction) (PSFFLUXz)3.63uJyphot.mag;em.opt.IdoublenullableIVFu[0/233]? Inverse variance of Fu in nMgy (PSFFLUX_IVARu)3.63uJyphot.mag;em.opt.UdoublenullableIVFg[0/643]? Inverse variance of Fg in nMgy (PSFFLUX_IVARg)3.63uJyphot.mag;em.opt.BdoublenullableIVFr[0/160]? Inverse variance of Fr in nMgy (PSFFLUX_IVARr)3.63uJyphot.mag;em.opt.RdoublenullableIVFi[0/74]? Inverse variance of Fi in nMgy (PSFFLUX_IVARi)3.63uJyphot.mag;em.opt.IdoublenullableIVFz[0/9]? Inverse variance of Fz in nMgy (PSFFLUX_IVARz)3.63uJyphot.mag;em.opt.Idoublenullableumag[14.2/31]? PSF (AB) magnitude in u band (not corrected for Galactic extinction) (PSFMAGu)magphot.mag;em.opt.Udoublenullablegmag[14.3/26.4]? PSF (AB) magnitude in g band (not corrected for Galactic extinction) (PSFMAGg)magphot.mag;em.opt.Bdoublenullablermag[14.4/26.6]? PSF (AB) magnitude in r band (not corrected for Galactic extinction) (PSFMAGr)magphot.mag;em.opt.Rdoublenullableimag[14/30]? PSF (AB) magnitude in i band (not corrected for Galactic extinction) (PSFMAGi)magphot.mag;em.opt.Idoublenullablezmag[14.3/24.5]? PSF (AB) magnitude in z band (not corrected for Galactic extinction) (PSFMAGz)magsrc.redshift;pos.heliocentricdoublenullablee_umag[0.007/2.7e+6]? umag uncertainty (PSFMAGERRu)magstat.error;phot.magdoublenullablee_gmag[0.007/38]? gmag uncertainty (PSFMAGERRg)magstat.error;phot.magdoublenullablee_rmag[0.005/26]? rmag uncertainty (PSFMAGERRr)magstat.error;phot.magdoublenullablee_imag[0.006/2.4e+6]? imag uncertainty (PSFMAGERRi)magstat.error;phot.magdoublenullablee_zmag[0.008/114]? zmag uncertainty (PSFMAGERRz)magstat.error;phot.magdoublenullablee_Hmag[0.015/0.6]? Hmag uncertainty (HMAG_ERR)magstat.error;phot.magfloatnullableExtg[0.007/2.8]? Galactic extinction in the g-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONg)magphys.absorptiondoublenullableExtr[0.005/2.1]? Galactic extinction in the r-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONr)magphys.absorptiondoublenullableExti[0.003/1.6]? Galactic extinction in the i-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONi)magphys.absorptiondoublenullableExtz[0.002/1.1]? Galactic extinction in the z-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONz)magphys.absorptiondoublenullableiMAG[-31.4/2] Absolute i-band magnitude, M_i_[z=2] using zPCA redshift, corrected for extinction (M_I) (4)magphys.magAbsdoubleSNR[-1.6/77] S/N median value for all good pixels in the five bands (SN_MEDIAN_ALL)stat.snrfloatGALEXGALEX matching flag (1=match) (GALEX_MATCHED)meta.codeintFFUV[-1.4/1318] FUV flux for GALEX in nMgy (FUV)3.63uJyphot.flux;em.UVdoubleIVFUV[-1/68408] Inverse variance of FFUV in nMgy (FUV_IVAR)3.63uJyphot.flux;em.UVdoubleIVNUVInverse variance of the NUV flux in nMgy (NUV_IVAR)3.63uJyphot.flux;em.UVdoubleUKIDSSUKIDSS DR8 matching flag (UKIDSS_MATCHED)meta.codeintFY[-5e-30/1.2e-29]? Y-band flux density from UKIDSS (YFLUX)W.m**-2.Hz**-1phot.flux.density;em.IRdoublenullablee_FY[5.8e-33/6.7e-30]? FY uncertainty (YFLUX_ERR)W.m**-2.Hz**-1stat.errordoublenullableFJ? J-band flux density from UKIDSS (JFLUX)W.m**-2.Hz**-1phot.flux.density;em.IR.Jdoublenullablee_FJ? FJ uncertainty (JFLUX_ERR)W.m**-2.Hz**-1stat.errordoublenullableFH? H-band flux density from UKIDSS (HFLUX)W.m**-2.Hz**-1phot.flux.density;em.IR.Hdoublenullablee_FH? FH uncertainty (HFLUX_ERR)W.m**-2.Hz**-1stat.errordoublenullableFK? K-band flux density from UKIDSS (KFLUX)W.m**-2.Hz**-1phot.mag;em.IR.Kdoublenullablee_FK? FK uncertainty (KFLUX_ERR)W.m**-2.Hz**-1stat.errordoublenullableFW1[-84770/197356] WISE flux in the W1 band (3.4um; Vega, nanomaggies) (W1_FLUX) (5)309.05nJyphot.mag;em.IR.3-4umdoubleIVW1[4.5e-6/0.14]? Inverse variance of FW1 (Vega, nanomaggies^-2^) (W1_FLUX_IVAR)309.05nJy**-2phot.mag;em.IR.3-4umdoublenullableW1mag[9.2/31.2]? WISE W1-band magnitude (Vega) (W1_MAG)magphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.0001/52540]? W1mag uncertainty (W1_MAG_ERR)magstat.error;phot.magdoublenullableChi2W1[-1/1.2e+6] Profile-weighted {xi}^2^ for the W1 band (W1_CHI2)stat.fit.chi2doubleSNFW1[-5564/14926] Signal-to-noise ratio for the W1 band from the flux and inverse variance (W1_FLUX_SNR)stat.snrdoublefracW1[-1/1] Fraction of source in profile-weighted fit (W1_SRC_FRAC)stat.fit.omcdoubleExtFW1[-12060/6841] Amount of flux added to the profile by nearby sources (W1_EXT_FLUX)stat.fit.omcdoubleExtW1[-205/2488] Fraction of profile flux from nearby sources (W1_EXT_FRAC)stat.fit.omcdoubleNW1[-1/3817] Number of pixels included in the profile fit (W1_NPIX)meta.numberintFW2[-127664/527681] WISE flux in the W2 band (4.6um; Vega, nanomaggies) (W2_FLUX)167.66nJyphot.mag;em.IR.4-8umdoubleIVW2[0/0.011]? Inverse variance of FW2 (Vega, nanomaggies^-2^) (W2_FLUX_IVAR)167.66nJy**-2phot.mag;em.IR.4-8umdoublenullableW2mag[8.1/31.4]? WISE W2-band magnitude (Vega) (W2_MAG)magphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.0002/245404]? W2mag uncertainty (W2_MAG_ERR)magstat.error;phot.magdoublenullableChi2W2[-1/114995] Profile-weighted {xi}^2^ for the W2 band (W2_CHI2)stat.fit.chi2doubleSNFW2[-2241/6734] Signal-to-noise ratio for the W2 band from flux and inverse variance (W2_FLUX_SNR)stat.snrdoublefracW2[-1/1] Fraction of source in the profile-weighted fit (W2_SRC_FRAC)stat.fit.omcdoubleExtFW2[-9089/6580] Amount of flux added to the profile by nearby sources (W2_EXT_FLUX)stat.fit.omcdoubleExtW2[-9.7/12145] Fraction of profile flux from nearby sources (W2_EXT_FRAC)stat.fit.omcdoubleNW2[-1/3306] Number of pixels included in the profile fit (W2_NPIX)meta.numberintFIRSTMatching flag for FIRST (FIRST_MATCHED)meta.codeintF1.4p[0.75/14775]? FIRST peak flux density at 20cm (FIRST_FLUX)mJyphot.flux.density;em.radio.750-1500MHzdoublenullableSNF[5/21190]? FIRST flux density S/N (FIRST_SNR)stat.snrdoublenullableSepF[/2]? SDSS-FIRST separation (SDSS2FIRST_SEP)arcsecpos;arith.difffloatnullableJmag[13/19]? 2MASS (Vega) J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.018/3]? Jmag uncertainty (JMAG_ERR)magstat.error;phot.magfloatnullableSNRJ[2.9/215]? 2MASS J-band S/N (JSNR)stat.snrdoublenullablef_Jmag[-1/6] 2MASS J-band photometry flag (JRDFLAG)meta.codeintSNRH[1.9/213]? 2MASS H-band S/N (HSNR)stat.snrdoublenullablef_Hmag2MASS H-band photometry flag (HRDFLAG)meta.codeintKmag[11.3/17.7]? 2MASS (Vega) K-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.017/1]? Kmag uncertainty (KMAG_ERR)magstat.error;phot.magfloatnullableSNRK[2.2/259]? 2MASS K-band S/N (KSNR)stat.snrdoublenullablef_Kmag2MASS K-band photometry flag (KRDFLAG)meta.codeintSep2M[0.002/2]? SDSS-2MASS separation (SDSS2MASS_SEP)arcsecpos;arith.difffloatnullable2RXS2nd ROSAT identifier ( 2RXS_ID)meta.id.crosscharRARdeg? Right ascension of the ROSAT source (J2000) ( 2RXS_RA)degpos.eq.ranullableDERdeg? Declination of the ROSAT source (J2000) ( 2RXS_DEC)degpos.eq.decnullableF0.5-2[1e-13/5.6e-11]? ROSAT source flux in the 0.5-2.0keV band in erg/s/cm^2^ ( 2RXS_SRC_FLUX)mW.m**-2phot.flux;em.X-ray.softdoublenullablee_F0.5-2[0/3.6e-12]? F0.5-2 uncertainty ( 2RXS_SRC_FLUX_ERR)mW.m**-2stat.errordoublenullableSepRX[0.12/97.4]? SDSS-ROSAT separation (SDSS2ROSAT_SEP)arcsecpos;arith.difffloatnullableXMM? XMM source number (XMM_SRC_ID)meta.id.crossnullableRAXdeg? XMM right ascension (J2000) (XMM_RA)degpos.eq.ranullableDEXdeg? XMM declination (J2000) (XMM_DEC)degpos.eq.decnullableF0.2-2[0/6.4e-12]? XMM soft (0.2-2.0keV) X-ray flux in erg/s/cm^2^ (XMM_SOFT_FLUX)mW.m**-2phot.flux;em.X-raydoublenullablee_F0.2-2[5.2e-17/5e-14]? F0.2-2 uncertainty (XMM_SOFT_FLUX_ERR)mW.m**-2stat.errordoublenullableF2-12[0/8.6e-12]? XMM hard (2.0-12.0keV) X-ray flux in erg/s/cm^2^ (XMM_HARD_FLUX)mW.m**-2phot.flux;em.X-raydoublenullablee_F2-12[3.5e-16/3.3e-13]? F2-12 uncertainty (XMM_HARD_FLUX_ERR)mW.m**-2stat.errordoublenullableF0.2-12[1.8e-15/1.5e-11]? XMM total (0.2-12.0keV) X-ray flux in erg/s/cm^2^ (XMM_TOTAL_FLUX)mW.m**-2phot.flux;em.X-raydoublenullablee_F0.2-12[5.5e-16/4.7e-13]? F0.2-12 uncertainty (XMM_TOTAL_FLUX_ERR)mW.m**-2stat.errordoublenullableSepXM[0.0026/12]? SDSS-XMM-Newton separation (SDSS2XMM_SEP)arcsecpos;arith.difffloatnullableMatchG[0/1] Gaia matching flag (GAIA_MATCHED)meta.codeintGaia? Gaia DR2 identifier (GAIA_DESIGNATION)meta.id.crossnullableRAGdeg? Gaia barycentric right ascension (J2015.5) (GAIA_RA)degpos.eq.ranullableDEGdeg? Gaia barycentric declination (J2015.5) (GAIA_DEC)degpos.eq.decnullablePlx[-25.2/14] Gaia absolute stellar parallax (J2015.5) (GAIA_PARALLAX)maspos.parallaxdoublee_Plx[0/1415]? Plx uncertainty (GAIA_PARALLAX_ERR)masstat.error;pos.parallaxdoublenullablepmRA[-42/38.3] Gaia proper motion in RA (J2015.5) (GAIA_PM_RA)mas/yrpos.pm;pos.eq.rafloate_pmRA[0/763]? pmRA uncertainty (GAIA_PM_RA_ERR)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-40.1/43.3] Gaia proper motion in DEC (J2015.5) (GAIA_PM_DEC)mas/yrpos.pm;pos.eq.decfloatGmag[14.6/22]? Gaia mean magnitude in the G band (Vega) (GAIA_G_MAG)magphot.mag;em.optfloatnullableSNG[5/1805]? Mean flux over the standard deviation in the (Vega) G band (GAIA_G_FLUX_SNR)stat.snrdoublenullableBPmag[0/23.6]? Gaia mean magnitude in the (Vega) BP band (GAIA_BP_MAG)magphot.mag;em.opt.BfloatnullableSNBP[0/9423]? Mean flux over the standard deviation in the (Vega) BP band (GAIA_BP_FLUX_SNR)stat.snrdoublenullableRPmag[0/23.2]? Gaia mean magnitude in the (Vega) RP band (GAIA_RP_MAG)magphot.mag;em.opt.RfloatnullableSNRP[0/39131]? Mean flux over the standard deviation in the (Vega) RP band (GAIA_RP_FLUX_SNR)stat.snrdoublenullableSepG[0.0001/0.5]? SDSS-Gaia separation (SDSS2GAIA_SEP)arcsecpos;arith.difffloatnullableSpDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar
VII/289/supersetThe "superset" of all SDSS-IV/eBOSS objects targeted as quasarsz[-0.012/7.06]? Best available redshiftsrc.redshift;pos.heliocentricdoublenullablePlateSpectroscopic plate number (G1)obs.fieldintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDR16QSource is included in SDSS quasar-only catalogmeta.ref.urlintnullableSDSSSDSS-DR16 designation (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME)meta.id;meta.maincharRAJ2000Right Ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000[-17.53/84.44] Declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedMJD[51608/58543] Spectroscopic Modified Julian Date (G1)time.epochintindexedFiberSpectroscopic fiber number (FIBERID) (G1)meta.noteintQNObject classification post-QuasarNET (Busca & Balland 2018arXiv180809955B) (AUTOCLASS_PQN) (1)meta.codecharDR14QObject classification based only on the DR14Q algorithm (AUTOCLASS_DR14Q)meta.code.class;src.classcharQQNBinary flag for QuasarNET quasar identification (1=QSO; -1=not processed by QuasarNET) (IS_QSO_QN)meta.codeintzQN[-0.46/7.26]? Redshift derived by QuasarNET (Z_QN)src.redshift;pos.heliocentricdoublenullable10K[0/1] Binary flag indicating objects selected for random visual inspection (0=not selected) (RANDOM_SELECT) (G2)meta.codeintz10K[-0.0075/5.01]? Redshift from visual inspection of random set (Z_10K)src.redshift;pos.heliocentricdoublenullablezDLA3[2.1/4.9]? Redshift for damped Ly{alpha} feature 3 (Z_DLA3)src.redshift;pos.heliocentricdoublenullablef_z10K[-1/3]? Confidence rating for visual inspection redshift of random set (3:highest confidence) (Z_CONF_10K) (G3)meta.codeintnullableC10KBinary flag indicating if the automated pipeline classification and redshift were correct in the random set (PIPE_CORR_10K) (G4)meta.codeintQ10KBinary flag for random set quasar identification (1=QSO; -1=not randomly selected) (IS_QSO_10K)meta.codeintPrim[0/1] Flag to indicate if observation is primary observation appearing in DR16Q or a duplicate (1=Primary) (PRIM_REC)meta.codeintTHINGID? SDSS identifier mainly for BOSS and eBOSS objects (THING_ID)meta.idlongnullablezvis[0.001/7.02]? Redshift from visual inspection (Z_VI)src.redshift;pos.heliocentricdoublenullablef_zvis[-1/3]? Confidence rating for visual inspection redshift (3: highest confidence) (Z_CONF)meta.codeintnullableClass[0/50]? Object classification from visual inspection (CLASS_PERSON) (2)meta.code.class;src.classintnullablezDR12Q[0.04/6.5]? Redshift taken from DR12Q (Cat. VII/279) visual inspection (Z_DR12Q)src.redshift;pos.heliocentricdoublenullableQDR12QFlag indicating if an object was a quasar in DR12Q (1=QSO) (IS_QSO_DR12Q)meta.codeintzDR7Q[0.06/5.47]? Redshift taken from DR7Q (Cat. VII/260) catalog (Z_DR7Q_SCH)src.redshift;pos.heliocentricfloatnullableQDR7QFlag indicating if an object was a quasar in DR7Q (IS_QSO_DR7Q)meta.codeintzDR6Q[0.07/5.5]? Redshift taken from DR6 (Hewett & Wild, 2010, J/MNRAS/405/2302) (Z_DR6Q_HW)src.redshift;pos.heliocentricdoublenullablezDR7Qa[0.06/5.5]? Redshift taken from DR7 (Shen+ 2011, J/ApJS/194/45) catalog ancillary columns (Z_DR7Q_HW) (G5)src.redshift;pos.heliocentricdoublenullableQSOFlag indicating quasars included in final catalog (1=QSO; 2=questionable -- see Section 3.6) (IS_QSO_FINAL)meta.codeintr_zSource for redshift z (SOURCE_Z) (3)meta.ref;pos.framecharzPipe[-0.012/7.06]? Redshift from SDSS pipeline version v5_13_0 (Z_PIPE)src.redshift;pos.heliocentricdoublenullableq_zPipe[-1/68] Quality flag on SDSS pipeline redshift estimate (ZWARNING) (G6)meta.code.qualintobjIDSDSS object identification number (sky version, run, rerun, camera column, field number, and ID) (G7)meta.idcharzPCA[-1008/7.3] PCA redshift derived by the redvsblue algorithm (Z_PCA)src.redshift;pos.heliocentricdoubleq_zPCA[0/1056] Warning flag for redvsblue redshift (ZWARN_PCA) (G6)meta.code.qualintChi2PCA[0.8/3e+7] {Delta}{chi}^2^ for PCA redshift versus cubic continuum fit (DELTACHI2_PCA)stat.fit.chi2doublezHa[-0.023/0.53]? PCA line redshift for H{alpha} from redvsblue (Z_HALPHA)src.redshift;pos.heliocentricdoublenullableq_zHa[0/7682] Warning flag for H{alpha} (ZWARN_HALPHA) (G6)meta.code.qualintChi2Ha[0/93997] {Delta}{chi}^2^ for H{alpha} line redshift versus cubic continuum fit (DELTACHI2_HALPHA)stat.fit.chi2doublezHb[-0.027/1.1]? PCA line redshift for H{beta} from redvsblue (Z_HBETA)src.redshift;pos.heliocentricdoublenullableq_zHb[0/7682] Warning flag for H{beta} (ZWARN_HBETA) (G6)meta.code.qualintChi2Hb[0/30848] {Delta}{chi}^2^ for H{beta} line versus cubic continuum fit (DELTACHI2_HBETA)stat.fit.chi2doublezMgII[0.28/2.6]? PCA line redshift for MgII from redvsblue (Z_MGII)src.redshift;pos.heliocentricdoublenullableq_zMgII[0/7682] Warning flag for MgII (ZWARN_MGII) (G6)meta.code.qualintChi2MgII[0/177687] {Delta}{chi}^2^ for MgII line redshift versus cubic continuum fit (DELTACHI2_MGII)stat.fit.chi2doublezCIII[0.88/4.3]? PCA line redshift for CIII] from redvsblue (Z_CIII)src.redshift;pos.heliocentricdoublenullableq_zCIII[0/7682] Warning flag for CIII] (ZWARN_CIII) (G6)meta.code.qualintChi2CIII[0/122713] {Delta}{chi}^2^ for CIII] line redshift versus cubic continuum fit (DELTACHI2_CIII)stat.fit.chi2doublezCIV[1.3/5.5]? PCA line redshift for CIV from redvsblue (Z_CIV)src.redshift;pos.heliocentricdoublenullableq_zCIV[0/7682] Warning flag for CIV (ZWARN_CIV) (G6)meta.code.qualintChi2CIV[0/3.1e+6] {Delta}{chi}^2^ for CIV line redshift versus cubic continuum fit (DELTACHI2_CIV)stat.fit.chi2doublezLyA[1.9/7.3]? PCA line redshift for Ly{alpha} from redvsblue (Z_LYA)src.redshift;pos.heliocentricdoublenullableq_zLyA[0/7682] Warning flag for Ly{alpha} (ZWARN_LYA) (G6)meta.code.qualintChi2LyA[0/1.6e+6] {Delta}{chi}^2^ for Ly{alpha} line redshift versus cubic continuum fit (DELTACHI2_LYA)stat.fit.chi2doublezDLA1[1.9/6.2]? Redshift for damped Ly{alpha} feature 1 (Z_DLA1)src.redshift;pos.heliocentricdoublenullablezDLA2[2/5.2]? Redshift for damped Ly{alpha} feature 2 (Z_DLA2)src.redshift;pos.heliocentricdoublenullablezDLA4[2.4/3.7]? Redshift for damped Ly{alpha} feature 4 (Z_DLA4)src.redshift;pos.heliocentricdoublenullablezDLA5[2.8/3.3]? Redshift for damped Ly{alpha} feature 5 (Z_DLA5)src.redshift;pos.heliocentricdoublenullableNHIDLA1[20.3/22]? Absorber column density for damped Ly{alpha} feature 1 (NHI_DLA1)phys.columnDensitydoublenullableNHIDLA2[20.3/21.8]? Absorber column density for damped Ly{alpha} feature 2 (NHI_DLA2)phys.columnDensitydoublenullableNHIDLA3[20.3/21.4]? Absorber column density for damped Ly{alpha} feature 3 (NHI_DLA3)phys.columnDensitydoublenullableNHIDLA4[20.3/21.1]? Absorber column density for damped Ly{alpha} feature 4 (NHI_DLA4)phys.columnDensitydoublenullableNHIDLA5[20.5/20.6]? Absorber column density for damped Ly{alpha} feature 5 (NHI_DLA5)phys.columnDensitydoublenullableIVFu[0/245]? Inverse variance of Fu in nMgy (PSFFLUX_IVARu)3.63uJyphot.mag;em.opt.Udoublenullableq_zDLA1Confidence of detection for damped Ly{alpha} feature 1 (CONF_DLA1)meta.code.qualfloatq_zDLA2Confidence of detection for damped Ly{alpha} features (CONF_DLA2)meta.code.qualfloatIVFz[0/14]? Inverse variance of Fz in nMgy (PSFFLUX_IVARz)3.63uJyphot.mag;em.opt.Idoublenullableq_zDLA3Confidence of detection for damped Ly{alpha} features (CONF_DLA3)meta.code.qualfloatq_zDLA4Confidence of detection for damped Ly{alpha} features (CONF_DLA4)meta.code.qualfloatq_zDLA5Confidence of detection for damped Ly{alpha} features (CONF_DLA5)meta.code.qualfloatPBAL[-1/1] BAL probability (BAL_PROB) (G8)stat.fit.goodnessdoubleBI(CIV)[/109061]? BALnicity index for the CIV region (BI_CIV)km/sspect.line.eqWidthdoublenullablee_BI(CIV)[0/3.1e+38]? BI(CIV) uncertainty (ERR_BI_CIV)km/sstat.errordoublenullableAI(CIV)[-618/121609]? Absorption index for the CIV region (AI_CIV)km/sspect.indexdoublenullablee_AI(CIV)[0/10897]? AI(CIV) uncertainty (ERR_AI_CIV)km/sstat.errordoublenullableBI(SIIV)[/85220]? BALnicity index for the SiIV region (BI_SIIV)km/sspect.line.eqWidthdoublenullablee_BI(SIIV)[0/1985]? BI(SIIV) uncertainty (ERR_BI_SIIV)km/sstat.errordoublenullableAI(SIIV)[/45671]? Absorption index for the SiIV region (AI_SIIV)km/sspect.indexdoublenullablee_AI(SIIV)[0/1622]? AI(SIIV) uncertainty (ERR_AI_SIIV)km/sstat.errordoublenullableBtarg1?=-1 BOSS target selection flag for the main survey (BOSS_TARGET1)meta.codenullableeBOSST0?=-1 eBOSS target selection flag for the pilot survey (SEQUELS) (EBOSS_TARGET0)meta.codenullableeBOSST1?=-1 eBOSS target selection flag for the main survey (EBOSS_TARGET1)meta.codenullableeBOSST2?=-1 eBOSS target 2 selection flag for the main survey (EBOSS_TARGET2)meta.codenullableAtarg1?=-1 BOSS target selection flag for the ancillary surveys (ANCILLARY_TARGET1)meta.codenullableAtarg2?=-1 BOSS target 2 selection flag for the ancillary surveys (ANCILLARY_TARGET2) --------------------------------------------------------------------------------meta.codenullableNspI[0/1] Number of additional spectra from SDSS-I/II (NSPEC_SDSS) (G9)meta.numberintNspBOSS[0/73] Number of additional spectra from BOSS/eBOSS (NSPEC_BOSS) (G9)meta.numberintNsp[0/73]? Total number of additional spectra (NSPEC) (G9)meta.numberintnullableSky[2]? SDSS photometric sky version number (SKYVERSION)meta.numberintnullableRun[94/8162]? SDSS imaging run number of photometric measurements (RUN_NUMBER)meta.idintnullableRerun[157/301]? SDSS photometric processing rerun number (RERUN_NUMBER)meta.idintnullableCam[1/6]? SDSS camera column number (CAMCOL_NUMBER)meta.idintnullableField[11/872]? SDSS field number (FIELD_NUMBER)meta.id;obs.fieldintnullablephotID[2/4093]? SDSS photometric ID (ID_NUMBER)meta.id;photintnullablelambda[4000/7500] Wavelength for which the fiber placement was optimized to account for atmospheric differential refraction (Dawson+ 2013AJ....145...10D), in {AA} (LAMBDA_EFF)0.1nmem.wlintOffset[0/300] Backstopping offset distance (ZOFFSET)umpos.distance;instr.offset;arith.diffdoubleXfocal[-325/325] Hole x-axis position in focal planemmpos.cartesian.x;instr.platedoubleYfocal[-326/326] Hole y-axis position in focal planemmpos.cartesian.y;instr.platedoubleChunkName of tiling chunk (from the plate-list product)obs.fieldcharTile[-3/17691] Tile numberobs.fieldintSN2[0/334] Overall (S/N)^2^ measure for plate, minimum of all four cameras (PLATESN2)stat.snrdoubleFu[-45/2001]? PSF flux in u-band in nMgy (not corrected for Galactic extinction) (PSFFLUXu)3.63uJyphot.mag;em.opt.UdoublenullableFg[-8.5/4455]? PSF flux in g-band in nMgy (not corrected for Galactic extinction) (PSFFLUXg)3.63uJyphot.mag;em.opt.BdoublenullableFr[-12/4398]? PSF flux in r-band in nMgy (not corrected for Galactic extinction) (PSFFLUXr)3.63uJyphot.mag;em.opt.RdoublenullableFi[-31/3796]? PSF flux in i-band in nMgy (not corrected for Galactic extinction) (PSFFLUXi)3.63uJyphot.mag;em.opt.IdoublenullableFz[-54/10794]? PSF flux in z-band in nMgy (not corrected for Galactic extinction) (PSFFLUXz)3.63uJyphot.mag;em.opt.IdoublenullableIVFg[0/762]? Inverse variance of Fg in nMgy (PSFFLUX_IVARg)3.63uJyphot.mag;em.opt.BdoublenullableIVFr[0/262]? Inverse variance of Fr in nMgy (PSFFLUX_IVARr)3.63uJyphot.mag;em.opt.RdoublenullableIVFi[0/129]? Inverse variance of Fi in nMgy (PSFFLUX_IVARi)3.63uJyphot.mag;em.opt.Idoublenullableumag[14.2/30.9]? PSF (AB) magnitude in u band (not corrected for Galactic extinction) (PSFMAGu)magphot.mag;em.opt.Udoublenullablegmag[13.3/30.1]? PSF (AB) magnitude in g band (not corrected for Galactic extinction) (PSFMAGg)magphot.mag;em.opt.Bdoublenullablermag[13.3/29.8]? PSF (AB) magnitude in r band (not corrected for Galactic extinction) (PSFMAGr)magphot.mag;em.opt.Rdoublenullableimag[13.5/30]? PSF (AB) magnitude in i band (not corrected for Galactic extinction) (PSFMAGi)magphot.mag;em.opt.Idoublenullablezmag[12.4/27.5]? PSF (AB) magnitude in z band (not corrected for Galactic extinction) (PSFMAGz)magsrc.redshift;pos.heliocentricdoublenullablee_umag[0.007/4.6e+6]? umag uncertainty (PSFMAGERRu)magstat.error;phot.magdoublenullablee_gmag[0.0006/513]? gmag uncertainty (PSFMAGERRg)magstat.error;phot.magdoublenullablee_rmag[0.0005/652]? rmag uncertainty (PSFMAGERRr)magstat.error;phot.magdoublenullablee_imag[0.001/2.4e+6]? imag uncertainty (PSFMAGERRi)magstat.error;phot.magdoublenullablee_zmag[0.008/422]? zmag uncertainty (PSFMAGERRz)magstat.error;phot.magdoublenullableExtu[0.009/3.8]? Galactic extinction in the u-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONu)magphys.absorptiondoublenullableExtg[0.007/2.8]? Galactic extinction in the g-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONg)magphys.absorptiondoublenullableExtr[0.005/2.1]? Galactic extinction in the r-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONr)magphys.absorptiondoublenullableExti[0.003/1.6]? Galactic extinction in the i-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONi)magphys.absorptiondoublenullableExtz[0.002/1.1]? Galactic extinction in the z-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONz)magphys.absorptiondoublenullableSNR[-1.8/120] S/N median value for all good pixels in the five bands (SN_MEDIAN_ALL)stat.snrdoubleSpDisplay the SDSS data for this quasarmeta.ref.urlchar