J/ApJS/265/25/catalogQuasars identified in LAMOST DR6-DR9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_EWnHb[0.01/1745]? EWnHb uncertainty (ERR_EW_NARROW_HB)0.1nmstat.errordoublenullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharObsID[586507179/911409072] Unique spectra ID in LAMOST databasemeta.id;obslongObsDateTarget observation datetime.epoch;obsnullableindexedLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.ss) (NAME)meta.id;meta.maincharRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000[-7.2/70] Declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedLMJD[58016/59377] Local modified Julian day of observation (1)dtime.epoch;obsintplanIDSpectroscopic plan identification (1)obs.fieldcharspID[1/16] Spectrograph identification (1)meta.id;instrintfiberID[1/250] Spectroscopic fiber number (1)meta.noteintz[0/4.44] Redshift based on visual inspection (Z_VI)src.redshiftdoubleq_z[0/1] ZWARNING flag based on visual inspection (1=not robust) (ZWARNING)meta.code.qual;src.redshiftintFlag[0/1]? Flag of quasar candidate selection (SOURCE_FLAG) (2)meta.codeintnullableiMAG[-32.9/-16.7]? Absolute i-band magnitude K-corrected to z=2, M_i_ (z=2) (Mi_Z2) (3)magphys.magAbs;em.opt.IdoublenullableNsp[1/30] Number of spectroscopic observations (NSPECOBS) (4)meta.numberintSNR[0/868] Median S/N per pixel of the spectrum (SNR_SPEC)stat.snrfloatBAL[0/1] Flag of broad absorption features (BAL_FLAG) (5)meta.codeintFbHa[2.2e-5/631480]? Flux of broad H{alpha} in 10^-17^erg/cm^2^/s (FLUX_BROAD_HA)1e-17mW.m**-2phot.fluxdoublenullablee_FbHa[1.9/18925]? FbHa uncertainty (ERR_FLUX_BROAD_HA)1e-17mW.m**-2stat.errordoublenullableFWHMbHa[2801/14360]? FWHM of broad H{alpha} (FWHM_BROAD_HA)km/sspect.line.widthdoublenullablee_FWHMbHa[0.02/3861]? FWHMbHa uncertainty (ERR_FWHM_BROAD_HA)km/sstat.errordoublenullableEWbHa[7e-6/50297]? Rest-frame EW of broad H{alpha} in {AA} (EW_BROAD_HA)0.1nmspect.line.eqWidthdoublenullablee_EWbHa[0.06/17026]? EWbHa uncertainty (ERR_EW_BROAD_HA)0.1nmstat.errordoublenullableFnHa[2.9/790606]? Flux of narrow H{alpha} in 10^-17^erg/cm^2^/s (FLUX_NARROW_HA)1e-17mW.m**-2phot.fluxdoublenullableFIRSTDisplay data from FIRST (VIII/92) within 5"phot.fluxchare_FnHa[0.6/21491]? FnHa uncertainty (ERR_FLUX_NARROW_HA)1e-17mW.m**-2stat.errordoublenullableFWHMnHa[351/902]? FWHM of narrow H{alpha} (FWHM_NARROW_HA)km/sspect.line.widthdoublenullablee_FWHMnHa[0.0005/263]? FWHMnHa uncertainty (ERR_FWHM_NARROW_HA)km/sstat.errordoublenullableEWnHa[0.3/57841]? Rest-frame EW of narrow H{alpha} in {AA} (EW_NARROW_HA)0.1nmspect.line.eqWidthdoublenullablee_EWnHa[0.03/2241]? EWnHa uncertainty (ERR_EW_NARROW_HA)0.1nmstat.errordoublenullableFNII[0.07/69512]? Flux of [NII]{lambda}6584 in 10^-17^erg/cm^2^/s (FLUX_NII_6584)1e-17mW.m**-2phot.fluxdoublenullablee_FNII[0.3/5777]? FNII uncertainty (ERR_FLUX_NII_6584)1e-17mW.m**-2stat.errordoublenullableFWHMNII[351/902]? FWHM of [NII]{lambda}6584 (FWHM_NII_6584)km/sspect.line.widthdoublenullablee_FWHMNII[0.0005/263]? FWHMNII uncertainty (ERR_FWHM_NII_6584)km/sstat.errordoublenullableEWNII[0.02/546]? Rest-frame EW of [NII]{lambda}6584 in {AA} (EW_NII_6584)0.1nmspect.line.eqWidthdoublenullablee_EWNII[0.02/565]? EWNII uncertainty (ERR_EW_NII_6584)0.1nmstat.errordoublenullableFSII6716[0.04/1.5e+13]? Flux of [SII]{lambda}6716 in 10^-17^erg/cm^2^/s (FLUX_SII_6716)1e-17mW.m**-2phot.fluxdoublenullablee_FSII6716[0.3/1.9e+13]? FSII6716 uncertainty (ERR_FLUX_SII_6716)1e-17mW.m**-2stat.errordoublenullableFWHMSII6716[351/902]? FWHM of [SII]{lambda}6716 (FWHM_SII_6716)km/sspect.line.widthdoublenullablee_FWHMSII6716[0.0005/263]? FWHMSII6716 uncertainty (ERR_FWHM_SII_6716)km/sstat.errordoublenullableEWSII6716[0.01/8.2e+11]? Rest-frame EW of [SII]{lambda}6716 in {AA} (EW_SII_6716)0.1nmspect.line.eqWidthdoublenullablee_EWSII6716[0.01/1.3e+12]? EWSII6716 uncertainty (ERR_EW_SII_6716)0.1nmstat.errordoublenullableFSII6731[0.2/744892]? Flux of [SII]{lambda}6731 in 10^-17^erg/cm^2^/s (FLUX_SII_6731)1e-17mW.m**-2phot.fluxdoublenullablee_FSII6731[0.3/1.9e+13]? FSII6731 uncertainty (ERR_FLUX_SII_6731)1e-17mW.m**-2stat.errordoublenullableFWHMSII6731[351/902]? FWHM of [SII]{lambda}6731 (FWHM_SII_6731)km/sspect.line.widthdoublenullablee_FWHMSII6731[0.0005/263]? FWHMSII6731 uncertainty (ERR_FWHM_SII_6731)km/sstat.errordoublenullableEWSII6731[0.05/42790]? Rest-frame EW of [SII]{lambda}6731 in {AA} (EW_SII_6731)0.1nmspect.line.eqWidthdoublenullablee_EWSII6731[0.01/143082]? EWSII6731 uncertainty (ERR_EW_SII_6731)0.1nmstat.errordoublenullableNHa[138/298]? Number of good pixels for the rest-frame 6350-6800{AA} (LINE_NPIX_HA)meta.numberintnullableSNHa[0.04/160]? Median S/N per pixel for the rest-frame 6350-6800{AA} (LINE_MED_SN_HA)stat.snrdoublenullableq_Ha[-1/0]? Flag for the quality in H{alpha} fitting (0=acceptable) (LINE_FLAG_HA) (6)meta.code.qualintnullableFbHb[1/152520]? Flux of broad H{beta} in 10^-17^erg/cm^2^/s (FLUX_BROAD_HB)1e-17mW.m**-2phot.fluxdoublenullablee_FbHb[0.5/1338]? FbHb uncertainty (ERR_FLUX_BROAD_HB)1e-17mW.m**-2stat.errordoublenullableFWHMbHb[2796/12086]? FWHM of broad H{beta} (FWHM_BROAD_HB)km/sspect.line.widthdoublenullablee_FWHMbHb[0.02/3565]? FWHMbHb uncertainty (ERR_FWHM_BROAD_HB)km/sstat.errordoublenullableEWbHb[0.1/524650]? Rest-frame EW of broad H{beta} in {AA} (EW_BROAD_HB)0.1nmspect.line.eqWidthdoublenullablee_EWbHb[0.01/199204]? EWbHb uncertainty (ERR_EW_BROAD_HB)0.1nmstat.errordoublenullableFnHb[0.2/8127]? Flux of narrow H{beta} in 10^-17^erg/cm^2^/s (FLUX_NARROW_HB)1e-17mW.m**-2phot.fluxdoublenullablee_FnHb[0.1/700]? FnHb uncertainty (ERR_FLUX_NARROW_HB)1e-17mW.m**-2stat.errordoublenullableFWHMnHb[166/904]? FWHM of narrow H{beta} (FWHM_NARROW_HB)km/sspect.line.widthdoublenullablee_FWHMnHb[0.0003/356]? FWHMnHb uncertainty (ERR_FWHM_NARROW_HB)km/sstat.errordoublenullableEWnHb[0.05/904]? Rest-frame EW of narrow H{beta} in {AA} (EW_NARROW_HB)0.1nmspect.line.eqWidthdoublenullableFOIII[4.2e-10/1.3e+13]? Flux of [OIII]{lambda}5007 in 10^-17^erg/cm^2^/s (FLUX_OIII_5007)1e-17mW.m**-2phot.fluxdoublenullablee_FOIII[0.3/8.3e+12]? FOIII uncertainty (ERR_FLUX_OIII_5007)1e-17mW.m**-2stat.errordoublenullableFWHMOIII[164/5338]? FWHM of [OIII]{lambda}5007 (FWHM_OIII_5007)km/sspect.line.widthdoublenullablee_FWHMOIII[0.02/2163]? FWHMOIII uncertainty (ERR_FWHM_OIII_5007)km/sstat.errordoublenullableEWOIII[6.2e-11/5.8e+11]? Rest-frame EW of [OIII]{lambda}5007 in {AA} (EW_OIII_5007)0.1nmspect.line.eqWidthdoublenullablee_EWOIII[0.008/6.2e+11]? EWOIII uncertainty (ERR_EW_OIII_5007)0.1nmstat.errordoublenullableNHb[242/449]? Number of good pixels for the rest-frame 4600-5100{AA} (LINE_NPIX_HB)meta.numberintnullableSNHb[0.001/828]? Median S/N per pixel for the rest-frame 4600-5100{AA} (LINE_MED_SN_HB)stat.snrdoublenullableq_Hb[-1/0]? Flag for the quality in H{beta} fitting (0=acceptable) (LINE_FLAG_HB) (6)meta.code.qualintnullableFbMgII[0.7/2.7e+11]? Flux of the broad MgII in 10^-17^erg/cm^2^/s (FLUX_BROAD_MGII)1e-17mW.m**-2phot.fluxdoublenullablee_FbMgII[0.3/2.8e+11]? FbMgII uncertainty (ERR_FLUX_BROAD_MGII)1e-17mW.m**-2stat.errordoublenullableFWHMbMgII[2819/7164]? FWHM of the broad MgII (FWHM_BROAD_MGII)km/sspect.line.widthdoublenullablee_FWHMbMgII[0.006/3416]? FWHMbMgII uncertainty (ERR_FWHM_BROAD_MGII)km/sstat.errordoublenullableEWbMgII[0.04/2.1e+10]? Rest-frame EW of the broad MgII in {AA} (EW_BROAD_MGII)0.1nmspect.line.eqWidthdoublenullablee_EWbMgII[0.01/2.1e+10]? EWbMgII uncertainty (ERR_EW_BROAD_MGII)0.1nmstat.errordoublenullableFnMgII[0.2/535203]? Flux of the narrow MgII in 10^-17^erg/cm^2^/s (FLUX_NARROW_MGII)1e-17mW.m**-2phot.fluxdoublenullablee_FnMgII[0.007/414619]? FnMgII uncertainty (ERR_FLUX_NARROW_MGII)1e-17mW.m**-2stat.errordoublenullableFWHMnMgII[349/908]? FWHM of the narrow MgII (FWHM_NARROW_MGII)km/sspect.line.widthdoublenullablee_FWHMnMgII[6.6e-5/275]? FWHMnMgII uncertainty (ERR_FWHM_NARROW_MGII)km/sstat.errordoublenullableEWnMgII[0.008/18304]? Rest-frame EW of the narrow MgII in {AA} (EW_NARROW_MGII)0.1nmspect.line.eqWidthdoublenullablee_EWnMgII[0.0008/46257]? EWnMgII uncertainty (ERR_EW_NARROW_MGII)0.1nmstat.errordoublenullableNMgII[16/311]? Number of good pixels for the rest-frame 2700-2900{AA} (LINE_NPIX_MGII)meta.numberintnullableSNMgII[-0.4/98]? Median S/N per pixel for the rest-frame 2700-2900{AA} (LINE_MED_SN_MGII)stat.snrdoublenullableq_MgII[-1/0]? Flag for the quality in MgII fitting (0=acceptable) (LINE_FLAG_MGII) (6)meta.code.qualintnullableFCIV[3.7/1.5e+7]? Flux of the whole CIV in 10^-17^erg/cm^2^/s (FLUX_CIV)1e-17mW.m**-2phot.fluxdoublenullablee_FCIV[0.2/3.6e+11]? FCIV uncertainty (ERR_FLUX_CIV)1e-17mW.m**-2stat.errordoublenullableFWHMCIV[352/15975]? FWHM of the whole CIV (FWHM_CIV)km/sspect.line.widthdoublenullablee_FWHMCIV[0.03/6174]? FWHMCIV uncertainty (ERR_FWHM_CIV)km/sstat.errordoublenullableEWCIV[0.1/333221]? Rest-frame EW of the whole CIV in {AA} (EW_CIV)0.1nmspect.line.eqWidthdoublenullablee_EWCIV[0.006/8.6e+9]? EWCIV uncertainty (ERR_EW_CIV)0.1nmstat.errordoublenullableFbCIV[1.7/328242]? Flux of the broad CIV in 10^-17^erg/cm^2^/s (FLUX_BROAD_CIV)1e-17mW.m**-2phot.fluxdoublenullablee_FbCIV[0.3/3.4e+11]? FbCIV uncertainty (ERR_FLUX_BROAD_CIV)1e-17mW.m**-2stat.errordoublenullableFWHMbCIV[2782/15975]? FWHM of the broad CIV (FWHM_BROAD_CIV)km/sspect.line.widthdoublenullablee_FWHMbCIV[0.06/4743]? FWHMbCIV uncertainty (ERR_FWHM_BROAD_CIV)km/sstat.errordoublenullableEWbCIV[0.04/165936]? Rest-frame EW of the broad CIV in {AA} (EW_BROAD_CIV)0.1nmspect.line.eqWidthdoublenullablee_EWbCIV[0.007/8.1e+9]? EWbCIV uncertainty (ERR_EW_BROAD_CIV)0.1nmstat.errordoublenullableFnCIV[0.1/1.5e+7]? Flux of the narrow CIV in 10^-17^erg/cm^2^/s (FLUX_NARROW_CIV)1e-17mW.m**-2phot.fluxdoublenullablee_FnCIV[0.1/3.9e+9]? FnCIV uncertainty (ERR_FLUX_NARROW_CIV)1e-17mW.m**-2stat.errordoublenullableFWHMnCIV[349/908]? FWHM of the narrow CIV (FWHM_NARROW_CIV)km/sspect.line.widthdoublenullablee_FWHMnCIV[0.0002/273]? FWHMnCIV uncertainty (ERR_FWHM_NARROW_CIV)km/sstat.errordoublenullableEWnCIV[0.006/332201]? Rest-frame EW of the narrow CIV in {AA} (EW_NARROW_CIV)0.1nmspect.line.eqWidthdoublenullablee_EWnCIV[0.003/1.6e+8]? EWnCIV uncertainty (ERR_EW_NARROW_CIV)0.1nmstat.errordoublenullableNCIV[14/544]? Number of good pixels for the rest-frame 1500-1700{AA} (LINE_NPIX_CIV)meta.numberintnullableSNCIV[-0.06/77]? Median S/N per pixel for the rest-frame 1500-1700{AA} (LINE_MED_SN_CIV)stat.snrdoublenullableq_CIV[-1/2]? Flag for the quality in CIV fitting (0=acceptable) (LINE_FLAG_CIV) (6)meta.code.qualintnullablealphaL1[-5/3] Wavelength power-law index from blueward of 4661{AA} (ALPHA_LAMBDA_1)spect.indexfloatalphaL2[-5/3] Wavelength power-law index from redward of 4661{AA} (ALPHA_LAMBDA_2)spect.indexfloatFeOpNorm[0/226] The normalization applied to the optical FeII template (Fe_op_norm)arith.factordoubleFeOpShift[-0.01/0.01] The Gaussian FWHM applied to the optical FeII template (Fe_op_shift)arith.factordoubleFeOpFWHM[1200/10000] The wavelength shift applied to the optical FeII template (Fe_op_FWHM)arith.factordoubleFeUVNorm[0/388] The normalization applied to the ultraviolet FeII template (Fe_uv_norm)arith.factordoubleFeUVShift[-0.01/0.01] The Gaussian FWHM applied to the ultraviolet FeII template (Fe_uv_shift)arith.factordoubleFeUVFWHM[1200/10000] The wavelength shift applied to the ultraviolet FeII template (Fe_uv_FWHM)arith.factordoublelogL1350[43.5/48.5]? Monochromatic luminosity at 1350{AA} in erg/s (LOGL1350)log(1e-07W)phys.luminositydoublenullablee_logL1350[7e-5/0.3]? logL1350 uncertainty (ERR_LOGL1350)log(1e-07W)stat.errordoublenullablelogL3000[39.8/47.2]? Monochromatic luminosity at 3000{AA} in erg/s (LOGL3000)log(1e-07W)phys.luminositydoublenullablee_logL3000[6e-5/2]? logL3000 uncertainty (ERR_LOGL3000)log(1e-07W)stat.errordoublenullablelogL5100[41.2/46]? Monochromatic luminosity at 5100{AA} in erg/s (LOGL5100)log(1e-07W)phys.luminosity;em.optdoublenullablee_logL5100[0.0001/0.3]? logL5100 uncertainty (ERR_LOGL5100)log(1e-07W)stat.errordoublenullablelogBHHb[7/9.6]? Virial BH mass based on H{beta} (LOGBH_HB)log(solMass)phys.massdoublenullablelogBHMgII[6.3/10]? Virial BH mass based on MgII (LOGBH_MGII)log(solMass)phys.massdoublenullablelogBHCIV[6.5/10.6]? Virial BH mass based on CIV (LOGBH_CIV)log(solMass)phys.massdoublenullableCts[3/1073]? Background-corrected source counts in 0.1-2.4keV from 2RXS source catalog ( 2RXS_CTS)ctphot.count;em.X-raydoublenullablee_Cts[2/34]? Cts uncertainty ( 2RXS_ECTS)ctstat.errordoublenullable2RXSExp[104/2725]? Source exposure time from 2RXS (RXS2_EXPTIME)stime.duration;obs.exposuredoublenullableSep2RXS[0.3/30]? LAMOST-2RXS separation (LM_2RXS_SEP)arcsecpos.angDistancedoublenullableF0.2-12keV[4.8e-15/8.2e-11]? Flux in 0.2-12.0keV band from 4XMM-DR11 in erg/s/cm^2^ ( 4XXM_FLUX)mW.m**-2phot.flux;em.X-raydoublenullablee_F0.2-12keV[1.7e-15/1.7e-13]? F0.2-12keV uncertainty ( 4XXM_FERR)mW.m**-2stat.errordoublenullableSep4XMM[0.004/3]? LAMOST-4XMM separation (LM_4XXM_SEP)arcsecpos.angDistancedoublenullableFpk[0.7/7710]? FIRST peak flux density at 20cm (FPEAK)mJyphot.flux.density;em.radio.750-1500MHzdoublenullableSepFIRST[0.008/5]? LAMOST-FIRST separation (LM_FIRST_SEP) (10)arcsecpos.angDistancedoublenullablegmag[12.9/25.2]? SDSS (or Pan-STARRS1 PSF) g magnitude (g_mag)magphot.mag;em.opt.Bdoublenullablee_gmag[0/12]? Uncertainty on the gmag (ERR_g_mag)magstat.error;phot.magdoublenullablermag[12.8/25]? SDSS (or Pan-STARRS1) r PSF magnitude (r_mag)magphot.mag;em.opt.Rdoublenullablee_rmag[0/10.5]? Uncertainty on the rmag (ERR_r_mag)magstat.error;phot.magdoublenullableimag[12.6/21.6]? SDSS (or Pan-STARRS1) i PSF magnitude (i_mag)magphot.mag;em.opt.Idoublenullablee_imag[0/1.6]? Uncertainty on the imag (ERR_i_mag)magstat.error;phot.magdoublenullablezmag[13/23]? SDSS (or Pan-STARRS1) z PSF magnitude (z_mag)magphot.mag;em.opt.Idoublenullablee_zmag[0.0003/3]? Uncertainty on the zmag (ERR_z_mag)magstat.error;phot.magdoublenullablef_mag[-1/1]? Flag of PSF magnitude (MAG_FLAG) (11)meta.codeintnullableW1mag[9.2/18.2]? Instrumental profile-fit photometry magnitude, WISE W1 band (W1_mag)magphot.mag;em.IR.3-4umdoublenullablee_W1mag[0.02/0.4]? Uncertainty on the W1mag (ERR_W1_mag)magstat.error;phot.magdoublenullableW2mag[8.2/17.5]? Instrumental profile-fit photometry magnitude, WISE W2 band (W2_mag)magphot.mag;em.IR.4-8umdoublenullablee_W2mag[0.018/0.6]? Uncertainty on the W2mag (ERR_W2_mag)magstat.error;phot.magdoublenullableW3mag[5.3/13.4]? Instrumental profile-fit photometry magnitude, WISE W3 band (W3_mag)magphot.flux.density;em.IR.8-15umdoublenullablee_W3mag[0.014/0.6]? Uncertainty on the W3mag (ERR_W3_mag)magstat.error;phot.magdoublenullableYmag[14.9/20.5]? WISE Y AperMag3 magnitude (2" aperture diameter) (Y_mag)magphot.mag;em.IR.Jdoublenullablee_Ymag[0.004/0.3]? Uncertainty on the Ymag (ERR_Y_mag)magstat.error;phot.magdoublenullableJmag[14.5/19.7]? WISE J AperMag3 magnitude (2" aperture diameter) (J_mag)magphot.mag;em.IR.Jdoublenullablee_Jmag[0.003/0.3]? Uncertainty on the Jmag (ERR_J_mag)magstat.error;phot.magdoublenullableKmag[12.8/18.6]? WISE K AperMag3 magnitude (2" aperture diameter) (K_mag)magphot.mag;em.IR.Kdoublenullablee_Kmag[0.003/0.3]? Uncertainty on the Kmag (ERR_K_mag)magstat.error;phot.magdoublenullablePS1Display data from PS1 (II/349) within 1"meta.ref.urlcharWISEDisplay data from WISE (II/311) within 5" if W3mag is filledmeta.ref.urlcharSDSSName of the quasar in the SDSS quasar catalog DR14Q; superseded by VII/289 (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME) (7)meta.id.crosschar2RXSName of the object in the second ROSAT all-sky survey point-source catalog (Boller+ 2016, J/A+A/588/A103 ; JHHMMSS.s+DDMMSS) ( 2RXS_NAME) (8)meta.id.crosschar4XMMName of the object in XMM-Newton Serendipitous Source Catalog (JHHMMSS.s+DDMMSS) ( 4XXM_NAME) (9)meta.id.crosschar