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VizieR

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VII/289/superset SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
The "superset" of all SDSS-IV/eBOSS objects targeted as quasars (original column names in green) (1440615 rows)
  recno=133535
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ColumnValue  Explain   (UCD)
_RAJ200001 21 56.85840 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+04 22 24.8450 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195001 19 21.38633 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+04 06 44.2132 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon137.25055813 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-57.64751456 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
133535recno 133535  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
DR16Q 1  Source is included in SDSS quasar-only catalog (meta.ref.url)

SDSS_NAME012156.85+042224.8  SDSS-DR16 designation (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME) (meta.id;meta.main)
RA020.486910 deg (i) Right Ascension (J2000) (RA) (pos.eq.ra;meta.main)
DEC+04.373568 deg (i) [-17.53/84.44] Declination (J2000) (DEC) (pos.eq.dec;meta.main)
Plate 8760  Spectroscopic plate number (Note G1)   (obs.field)
MJD57672  (i) [51608/58543] Spectroscopic Modified Julian Date (Note G1)   (time.epoch)
FIBERID 993  Spectroscopic fiber number (FIBERID) (Note G1)   (meta.note)
AUTOCLASS_PQNQSO  Object classification post-QuasarNET (Busca & Balland 2018arXiv180809955B) (AUTOCLASS_PQN) (Note 1)   (meta.code)
AUTOCLASS_DR14QQSO  Object classification based only on the DR14Q algorithm (AUTOCLASS_DR14Q) (meta.code.class;src.class)
IS_QSO_QN 1  Binary flag for QuasarNET quasar identification (1=QSO; -1=not processed by QuasarNET) (IS_QSO_QN) (meta.code)
Z_QN 0.634617   [-0.46/7.26] Redshift derived by QuasarNET (Z_QN) (src.redshift;pos.heliocentric)
RANDOM_SELECT0   [0/1] Binary flag indicating objects selected for random visual inspection (0=not selected) (RANDOM_SELECT) (Note G2)   (meta.code)
Z_10K    [-0.0075/5.01] Redshift from visual inspection of random set (Z_10K) (src.redshift;pos.heliocentric)
Z_CONF_10K-1   [-1/3] Confidence rating for visual inspection redshift of random set (3:highest confidence) (Z_CONF_10K) (Note G3)   (meta.code)
PIPE_CORR_10K-1  Binary flag indicating if the automated pipeline classification and redshift were correct in the random set (PIPE_CORR_10K) (Note G4)   (meta.code)
IS_QSO_10K-1  Binary flag for random set quasar identification (1=QSO; -1=not randomly selected) (IS_QSO_10K) (meta.code)
PRIM_REC1   [0/1] Flag to indicate if observation is primary observation appearing in DR16Q or a duplicate (1=Primary) (PRIM_REC) (meta.code)
THING_ID148950339   SDSS identifier mainly for BOSS and eBOSS objects (THING_ID) (meta.id)
Z_VI    [0.001/7.02] Redshift from visual inspection (Z_VI) (src.redshift;pos.heliocentric)
Z_CONF 0   [-1/3] Confidence rating for visual inspection redshift (3: highest confidence) (Z_CONF) (meta.code)
CLASS_PERSON 0   [0/50] Object classification from visual inspection (CLASS_PERSON) (Note 2)   (meta.code.class;src.class)
Z_DR12Q    [0.04/6.5] Redshift taken from DR12Q (Cat. VII/279) visual inspection (Z_DR12Q) (src.redshift;pos.heliocentric)
IS_QSO_DR12Q 0  Flag indicating if an object was a quasar in DR12Q (1=QSO) (IS_QSO_DR12Q) (meta.code)
Z_DR7Q_SCH    [0.06/5.47] Redshift taken from DR7Q (Cat. VII/260) catalog (Z_DR7Q_SCH) (src.redshift;pos.heliocentric)
IS_QSO_DR7Q-1  Flag indicating if an object was a quasar in DR7Q (IS_QSO_DR7Q) (meta.code)
Z_DR6Q_HW    [0.07/5.5] Redshift taken from DR6 (Hewett & Wild, 2010, J/MNRAS/405/2302) (Z_DR6Q_HW) (src.redshift;pos.heliocentric)
Z_DR7Q_HW    [0.06/5.5] Redshift taken from DR7 (Shen+ 2011, J/ApJS/194/45) catalog ancillary columns (Z_DR7Q_HW) (Note G5)   (src.redshift;pos.heliocentric)
IS_QSO_FINAL 1  Flag indicating quasars included in final catalog (1=QSO; 2=questionable – see Section 3.6) (IS_QSO_FINAL) (meta.code)
z 0.636479   [-0.012/7.06] Best available redshift (src.redshift;pos.heliocentric)
SOURCE_ZPIPE  Source for redshift z (SOURCE_Z) (Note 3)   (meta.ref;pos.frame)
Z_PIPE 0.636479   [-0.012/7.06] Redshift from SDSS pipeline version v5130 (Z_PIPE) (src.redshift;pos.heliocentric)
ZWARNING 0   [-1/68] Quality flag on SDSS pipeline redshift estimate (ZWARNING) (G6) Binary flag (Note)   (meta.code.qual)
objID1237678622236279028  SDSS object identification number (sky version, run, rerun, camera column, field number, and ID) (Note G7)   (meta.id)
Z_PCA 0.636538   [-1008/7.3] PCA redshift derived by the redvsblue algorithm (Z_PCA) (src.redshift;pos.heliocentric)
ZWARN_PCA 0   [0/1056] Warning flag for redvsblue redshift (ZWARN_PCA) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_PCA 1.37021e+04   [0.8/3e+7] Δχ2 for PCA redshift versus cubic continuum fit (DELTACHI2_PCA) (stat.fit.chi2)
Z_HALPHA    [-0.023/0.53] PCA line redshift for Hα from redvsblue (Z_HALPHA) (src.redshift;pos.heliocentric)
ZWARN_HALPHA7682   [0/7682] Warning flag for Hα (ZWARN_HALPHA) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_HALPHA 0.00000e+00   [0/93997] Δχ2 for Hα line redshift versus cubic continuum fit (DELTACHI2_HALPHA) (stat.fit.chi2)
Z_HBETA 0.636787   [-0.027/1.1] PCA line redshift for Hβ from redvsblue (Z_HBETA) (src.redshift;pos.heliocentric)
ZWARN_HBETA 0   [0/7682] Warning flag for Hβ (ZWARN_HBETA) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_HBETA 3.94983e+02   [0/30848] Δχ2 for Hβ line versus cubic continuum fit (DELTACHI2_HBETA) (stat.fit.chi2)
Z_MGII 0.636406   [0.28/2.6] PCA line redshift for MgII from redvsblue (Z_MGII) (src.redshift;pos.heliocentric)
ZWARN_MGII 0   [0/7682] Warning flag for MgII (ZWARN_MGII) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_MGII 2.00748e+03   [0/177687] Δχ2 for MgII line redshift versus cubic continuum fit (DELTACHI2_MGII) (stat.fit.chi2)
Z_CIII    [0.88/4.3] PCA line redshift for CIII] from redvsblue (Z_CIII) (src.redshift;pos.heliocentric)
ZWARN_CIII7682   [0/7682] Warning flag for CIII] (ZWARN_CIII) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_CIII 0.00000e+00   [0/122713] Δχ2 for CIII] line redshift versus cubic continuum fit (DELTACHI2_CIII) (stat.fit.chi2)
Z_CIV    [1.3/5.5] PCA line redshift for CIV from redvsblue (Z_CIV) (src.redshift;pos.heliocentric)
ZWARN_CIV7682   [0/7682] Warning flag for CIV (ZWARN_CIV) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_CIV 0.00000e+00   [0/3.1e+6] Δχ2 for CIV line redshift versus cubic continuum fit (DELTACHI2_CIV) (stat.fit.chi2)
Z_LYA    [1.9/7.3] PCA line redshift for Lyα from redvsblue (Z_LYA) (src.redshift;pos.heliocentric)
ZWARN_LYA7682   [0/7682] Warning flag for Lyα (ZWARN_LYA) (G6) Binary flag (Note)   (meta.code.qual)
DELTACHI2_LYA 0.00000e+00   [0/1.6e+6] Δχ2 for Lyα line redshift versus cubic continuum fit (DELTACHI2_LYA) (stat.fit.chi2)
Z_DLA1    [1.9/6.2] Redshift for damped Lyα feature 1 (Z_DLA1) (src.redshift;pos.heliocentric)
Z_DLA2    [2/5.2] Redshift for damped Lyα feature 2 (Z_DLA2) (src.redshift;pos.heliocentric)
Z_DLA3    [2.1/4.9] Redshift for damped Lyα feature 3 (Z_DLA3) (src.redshift;pos.heliocentric)
Z_DLA4    [2.4/3.7] Redshift for damped Lyα feature 4 (Z_DLA4) (src.redshift;pos.heliocentric)
Z_DLA5    [2.8/3.3] Redshift for damped Lyα feature 5 (Z_DLA5) (src.redshift;pos.heliocentric)
NHI_DLA1  [-] [20.3/22] Absorber column density for damped Lyα feature 1 (NHI_DLA1) (phys.columnDensity)
NHI_DLA2  [-] [20.3/21.8] Absorber column density for damped Lyα feature 2 (NHI_DLA2) (phys.columnDensity)
NHI_DLA3  [-] [20.3/21.4] Absorber column density for damped Lyα feature 3 (NHI_DLA3) (phys.columnDensity)
NHI_DLA4  [-] [20.3/21.1] Absorber column density for damped Lyα feature 4 (NHI_DLA4) (phys.columnDensity)
NHI_DLA5  [-] [20.5/20.6] Absorber column density for damped Lyα feature 5 (NHI_DLA5) (phys.columnDensity)
CONF_DLA1-1.0000  Confidence of detection for damped Lyα feature 1 (CONF_DLA1) Binary flag (meta.code.qual)
CONF_DLA2-1.0000  Confidence of detection for damped Lyα features (CONF_DLA2) Binary flag (meta.code.qual)
CONF_DLA3-1.0000  Confidence of detection for damped Lyα features (CONF_DLA3) Binary flag (meta.code.qual)
CONF_DLA4-1.0000  Confidence of detection for damped Lyα features (CONF_DLA4) Binary flag (meta.code.qual)
CONF_DLA5-1.0000  Confidence of detection for damped Lyα features (CONF_DLA5) Binary flag (meta.code.qual)
BAL_PROB-1.000000   [-1/1] BAL probability (BAL_PROB) (Note G8)   (stat.fit.goodness)
BI_CIV  km/s [/109061] BALnicity index for the CIV region (BI_CIV) (spect.line.eqWidth)
ERR_BI_CIV  km/s [0/3.1e+38] BI(CIV) uncertainty (ERR_BI_CIV) (stat.error)
AI_CIV  km/s [-618/121609] Absorption index for the CIV region (AI_CIV) (spect.index)
ERR_AI_CIV  km/s [0/10897] AI(CIV) uncertainty (ERR_AI_CIV) (stat.error)
BI_SIIV  km/s [/85220] BALnicity index for the SiIV region (BI_SIIV) (spect.line.eqWidth)
ERR_BI_SIIV  km/s [0/1985] BI(SIIV) uncertainty (ERR_BI_SIIV) (stat.error)
AI_SIIV  km/s [/45671] Absorption index for the SiIV region (AI_SIIV) (spect.index)
ERR_AI_SIIV  km/s [0/1622] AI(SIIV) uncertainty (ERR_AI_SIIV) (stat.error)
BOSS_TARGET1 0   BOSS target selection flag for the main survey (BOSS_TARGET1) Binary flag (meta.code)
EBOSS_TARGET0 0   eBOSS target selection flag for the pilot survey (SEQUELS) (EBOSS_TARGET0) Binary flag (meta.code)
EBOSS_TARGET1 3221241856   eBOSS target selection flag for the main survey (EBOSS_TARGET1) Binary flag (meta.code)
EBOSS_TARGET2 2147483665   eBOSS target 2 selection flag for the main survey (EBOSS_TARGET2) Binary flag (meta.code)
ANCILLARY_TARGET1 0   BOSS target selection flag for the ancillary surveys (ANCILLARY_TARGET1) Binary flag (meta.code)
ANCILLARY_TARGET2 0   BOSS target 2 selection flag for the ancillary surveys (ANCILLARY_TARGET2) (meta.code)
NSPEC_SDSS0   [0/1] Number of additional spectra from SDSS-I/II (NSPEC_SDSS) (Note G9)   (meta.number)
NSPEC_BOSS 0   [0/73] Number of additional spectra from BOSS/eBOSS (NSPEC_BOSS) (Note G9)   (meta.number)
NSPEC 0   [0/73] Total number of additional spectra (NSPEC) (Note G9)   (meta.number)
SKYVERSION2   [2] SDSS photometric sky version number (SKYVERSION) (meta.number)
RUN_NUMBER7718   [94/8162] SDSS imaging run number of photometric measurements (RUN_NUMBER) (meta.id)
RERUN_NUMBER301   [157/301] SDSS photometric processing rerun number (RERUN_NUMBER) (meta.id)
CAMCOL_NUMBER2   [1/6] SDSS camera column number (CAMCOL_NUMBER) (meta.id)
FIELD_NUMBER125   [11/872] SDSS field number (FIELD_NUMBER) (meta.id;obs.field)
ID_NUMBER 244   [2/4093] SDSS photometric ID (ID_NUMBER) (meta.id;phot)
LAMBDA_EFF5400 0.1nm [4000/7500] Wavelength for which the fiber placement was optimized to account for atmospheric differential refraction (Dawson+ 2013AJ....145...10D), in Å (LAMBDA_EFF) (em.wl)
ZOFFSET 0.000000 um [0/300] Backstopping offset distance (ZOFFSET) (pos.distance;instr.offset;arith.diff)
Xfocal 279.213623 mm [-325/325] Hole x-axis position in focal plane (pos.cartesian.x;instr.plate)
Yfocal 78.283928 mm [-326/326] Hole y-axis position in focal plane (pos.cartesian.y;instr.plate)
Chunkeboss9  Name of tiling chunk (from the plate-list product) (obs.field)
Tile 16098   [-3/17691] Tile number (obs.field)
PLATESN2 13.477900   [0/334] Overall (S/N)2 measure for plate, minimum of all four cameras (PLATESN2) (stat.snr)
PSFFLUXu 5.471925 3.63uJy [-45/2001] PSF flux in u-band in nMgy (not corrected for Galactic extinction) (PSFFLUXu) (phot.mag;em.opt.U)
PSFFLUXg 9.764647 3.63uJy [-8.5/4455] PSF flux in g-band in nMgy (not corrected for Galactic extinction) (PSFFLUXg) (phot.mag;em.opt.B)
PSFFLUXr 9.869002 3.63uJy [-12/4398] PSF flux in r-band in nMgy (not corrected for Galactic extinction) (PSFFLUXr) (phot.mag;em.opt.R)
PSFFLUXi 13.110202 3.63uJy [-31/3796] PSF flux in i-band in nMgy (not corrected for Galactic extinction) (PSFFLUXi) (phot.mag;em.opt.I)
PSFFLUXz 14.771604 3.63uJy [-54/10794] PSF flux in z-band in nMgy (not corrected for Galactic extinction) (PSFFLUXz) (phot.mag;em.opt.I)
PSFFLUX_IVARu 7.505538 3.63uJy [0/245] Inverse variance of Fu in nMgy (PSFFLUX_IVARu) (phot.mag;em.opt.U)
PSFFLUX_IVARg 15.583539 3.63uJy [0/762] Inverse variance of Fg in nMgy (PSFFLUX_IVARg) (phot.mag;em.opt.B)
PSFFLUX_IVARr 28.344624 3.63uJy [0/262] Inverse variance of Fr in nMgy (PSFFLUX_IVARr) (phot.mag;em.opt.R)
PSFFLUX_IVARi 6.898448 3.63uJy [0/129] Inverse variance of Fi in nMgy (PSFFLUX_IVARi) (phot.mag;em.opt.I)
PSFFLUX_IVARz 1.108588 3.63uJy [0/14] Inverse variance of Fz in nMgy (PSFFLUX_IVARz) (phot.mag;em.opt.I)
PSFMAGu 20.6539 mag [14.2/30.9] PSF (AB) magnitude in u band (not corrected for Galactic extinction) (PSFMAGu) (phot.mag;em.opt.U)
PSFMAGg 20.0258 mag [13.3/30.1] PSF (AB) magnitude in g band (not corrected for Galactic extinction) (PSFMAGg) (phot.mag;em.opt.B)
PSFMAGr 20.0142 mag [13.3/29.8] PSF (AB) magnitude in r band (not corrected for Galactic extinction) (PSFMAGr) (phot.mag;em.opt.R)
PSFMAGi 19.7058 mag [13.5/30] PSF (AB) magnitude in i band (not corrected for Galactic extinction) (PSFMAGi) (phot.mag;em.opt.I)
PSFMAGz 19.5737 mag [12.4/27.5] PSF (AB) magnitude in z band (not corrected for Galactic extinction) (PSFMAGz) (src.redshift;pos.heliocentric)
PSFMAGERRu 7.23312e-02 mag [0.007/4.6e+6] umag uncertainty (PSFMAGERRu) (stat.error;phot.mag)
PSFMAGERRg 2.81618e-02 mag [0.0006/513] gmag uncertainty (PSFMAGERRg) (stat.error;phot.mag)
PSFMAGERRr 2.06580e-02 mag [0.0005/652] rmag uncertainty (PSFMAGERRr) (stat.error;phot.mag)
PSFMAGERRi 3.15192e-02 mag [0.001/2.4e+6] imag uncertainty (PSFMAGERRi) (stat.error;phot.mag)
PSFMAGERRz 6.94612e-02 mag [0.008/422] zmag uncertainty (PSFMAGERRz) (stat.error;phot.mag)
EXTINCTIONu 0.156755 mag [0.009/3.8] Galactic extinction in the u-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONu) (phys.absorption)
EXTINCTIONg 0.122143 mag [0.007/2.8] Galactic extinction in the g-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONg) (phys.absorption)
EXTINCTIONr 0.084498 mag [0.005/2.1] Galactic extinction in the r-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONr) (phys.absorption)
EXTINCTIONi 0.062791 mag [0.003/1.6] Galactic extinction in the i-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONi) (phys.absorption)
EXTINCTIONz 0.046705 mag [0.002/1.1] Galactic extinction in the z-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONz) (phys.absorption)
SN_MEDIAN_ALL 5.7646   [-1.8/120] S/N median value for all good pixels in the five bands (SN_MEDIAN_ALL) (stat.snr)

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