VizieR Search Page [Back] ⋅ [Forwd] ⋅ [Print] ⋅ [Close]
Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
VII/289
  SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
ReadMe+ftp
2020ApJS..250....8L
Similar Catalogs
Post annotation 		img(gal)
1.VII/289/supersetThe "superset" of all SDSS-IV/eBOSS objects targeted as quasars (original column names in green) (1440615 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
Standard Original
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  DR16Q  (n)Source is included in SDSS quasar-only catalog (meta.ref.url)
  SDSS (char) SDSS-DR16 designation (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME) (meta.id;meta.main)
  RAJ2000 deg (i) Right Ascension (J2000) (RA) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) [-17.53/84.44] Declination (J2000) (DEC) (pos.eq.dec;meta.main)
  Plate  Spectroscopic plate number (Note G1)   (obs.field)
  MJD  (i) [51608/58543] Spectroscopic Modified Julian Date (Note G1)   (time.epoch)
  Fiber  Spectroscopic fiber number (FIBERID) (Note G1)   (meta.note)
  QN (char) Object classification post-QuasarNET (Busca & Balland 2018arXiv180809955B) (AUTOCLASS_PQN) (Note 1)   (meta.code)
  DR14Q (char) Object classification based only on the DR14Q algorithm (AUTOCLASS_DR14Q) (meta.code.class;src.class)
  QQN  Binary flag for QuasarNET quasar identification (1=QSO; -1=not processed by QuasarNET) (IS_QSO_QN) (meta.code)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  zQN  (n) [-0.46/7.26] Redshift derived by QuasarNET (Z_QN) (src.redshift;pos.heliocentric)
  10K   [0/1] Binary flag indicating objects selected for random visual inspection (0=not selected) (RANDOM_SELECT) (Note G2)   (meta.code)
  z10K  (n) [-0.0075/5.01] Redshift from visual inspection of random set (Z_10K) (src.redshift;pos.heliocentric)
  f_z10K  (n) [-1/3] Confidence rating for visual inspection redshift of random set (3:highest confidence) (Z_CONF_10K) (Note G3)   (meta.code)
  C10K  Binary flag indicating if the automated pipeline classification and redshift were correct in the random set (PIPE_CORR_10K) (Note G4)   (meta.code)
  Q10K  Binary flag for random set quasar identification (1=QSO; -1=not randomly selected) (IS_QSO_10K) (meta.code)
  Prim   [0/1] Flag to indicate if observation is primary observation appearing in DR16Q or a duplicate (1=Primary) (PRIM_REC) (meta.code)
  THINGID  (n) SDSS identifier mainly for BOSS and eBOSS objects (THING_ID) (meta.id)
  zvis  (n) [0.001/7.02] Redshift from visual inspection (Z_VI) (src.redshift;pos.heliocentric)
  f_zvis  (n) [-1/3] Confidence rating for visual inspection redshift (3: highest confidence) (Z_CONF) (meta.code)
  Class  (n) [0/50] Object classification from visual inspection (CLASS_PERSON) (Note 2)   (meta.code.class;src.class)
  zDR12Q  (n) [0.04/6.5] Redshift taken from DR12Q (Cat. VII/279) visual inspection (Z_DR12Q) (src.redshift;pos.heliocentric)
  QDR12Q  Flag indicating if an object was a quasar in DR12Q (1=QSO) (IS_QSO_DR12Q) (meta.code)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  zDR7Q  (n) [0.06/5.47] Redshift taken from DR7Q (Cat. VII/260) catalog (Z_DR7Q_SCH) (src.redshift;pos.heliocentric)
  QDR7Q  Flag indicating if an object was a quasar in DR7Q (IS_QSO_DR7Q) (meta.code)
  zDR6Q  (n) [0.07/5.5] Redshift taken from DR6 (Hewett & Wild, 2010, J/MNRAS/405/2302) (Z_DR6Q_HW) (src.redshift;pos.heliocentric)
  zDR7Qa  (n) [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)
  QSO  Flag indicating quasars included in final catalog (1=QSO; 2=questionable – see Section 3.6) (IS_QSO_FINAL) (meta.code)
  z  (n) [-0.012/7.06] Best available redshift (src.redshift;pos.heliocentric)
  r_z (char) Source for redshift z (SOURCE_Z) (Note 3)   (meta.ref;pos.frame)
  zPipe  (n) [-0.012/7.06] Redshift from SDSS pipeline version v5130 (Z_PIPE) (src.redshift;pos.heliocentric)
  q_zPipe   [-1/68] Quality flag on SDSS pipeline redshift estimate (ZWARNING) (G6) Binary flag (Note)   (meta.code.qual)
  objID (char) SDSS object identification number (sky version, run, rerun, camera column, field number, and ID) (Note G7)   (meta.id)
  zPCA   [-1008/7.3] PCA redshift derived by the redvsblue algorithm (Z_PCA) (src.redshift;pos.heliocentric)
  q_zPCA   [0/1056] Warning flag for redvsblue redshift (ZWARN_PCA) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2PCA   [0.8/3e+7] Δχ2 for PCA redshift versus cubic continuum fit (DELTACHI2_PCA) (stat.fit.chi2)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  zHa  (n) [-0.023/0.53] PCA line redshift for Hα from redvsblue (Z_HALPHA) (src.redshift;pos.heliocentric)
  q_zHa   [0/7682] Warning flag for Hα (ZWARN_HALPHA) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2Ha   [0/93997] Δχ2 for Hα line redshift versus cubic continuum fit (DELTACHI2_HALPHA) (stat.fit.chi2)
  zHb  (n) [-0.027/1.1] PCA line redshift for Hβ from redvsblue (Z_HBETA) (src.redshift;pos.heliocentric)
  q_zHb   [0/7682] Warning flag for Hβ (ZWARN_HBETA) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2Hb   [0/30848] Δχ2 for Hβ line versus cubic continuum fit (DELTACHI2_HBETA) (stat.fit.chi2)
  zMgII  (n) [0.28/2.6] PCA line redshift for MgII from redvsblue (Z_MGII) (src.redshift;pos.heliocentric)
  q_zMgII   [0/7682] Warning flag for MgII (ZWARN_MGII) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2MgII   [0/177687] Δχ2 for MgII line redshift versus cubic continuum fit (DELTACHI2_MGII) (stat.fit.chi2)
  zCIII  (n) [0.88/4.3] PCA line redshift for CIII] from redvsblue (Z_CIII) (src.redshift;pos.heliocentric)
  q_zCIII   [0/7682] Warning flag for CIII] (ZWARN_CIII) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2CIII   [0/122713] Δχ2 for CIII] line redshift versus cubic continuum fit (DELTACHI2_CIII) (stat.fit.chi2)
  zCIV  (n) [1.3/5.5] PCA line redshift for CIV from redvsblue (Z_CIV) (src.redshift;pos.heliocentric)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  q_zCIV   [0/7682] Warning flag for CIV (ZWARN_CIV) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2CIV   [0/3.1e+6] Δχ2 for CIV line redshift versus cubic continuum fit (DELTACHI2_CIV) (stat.fit.chi2)
  zLyA  (n) [1.9/7.3] PCA line redshift for Lyα from redvsblue (Z_LYA) (src.redshift;pos.heliocentric)
  q_zLyA   [0/7682] Warning flag for Lyα (ZWARN_LYA) (G6) Binary flag (Note)   (meta.code.qual)
  Chi2LyA   [0/1.6e+6] Δχ2 for Lyα line redshift versus cubic continuum fit (DELTACHI2_LYA) (stat.fit.chi2)
  zDLA1  (n) [1.9/6.2] Redshift for damped Lyα feature 1 (Z_DLA1) (src.redshift;pos.heliocentric)
  zDLA2  (n) [2/5.2] Redshift for damped Lyα feature 2 (Z_DLA2) (src.redshift;pos.heliocentric)
  zDLA3  (n) [2.1/4.9] Redshift for damped Lyα feature 3 (Z_DLA3) (src.redshift;pos.heliocentric)
  zDLA4  (n) [2.4/3.7] Redshift for damped Lyα feature 4 (Z_DLA4) (src.redshift;pos.heliocentric)
  zDLA5  (n) [2.8/3.3] Redshift for damped Lyα feature 5 (Z_DLA5) (src.redshift;pos.heliocentric)
  NHIDLA1 [-] (n) [20.3/22] Absorber column density for damped Lyα feature 1 (NHI_DLA1) (phys.columnDensity)
  NHIDLA2 [-] (n) [20.3/21.8] Absorber column density for damped Lyα feature 2 (NHI_DLA2) (phys.columnDensity)
  NHIDLA3 [-] (n) [20.3/21.4] Absorber column density for damped Lyα feature 3 (NHI_DLA3) (phys.columnDensity)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  NHIDLA4 [-] (n) [20.3/21.1] Absorber column density for damped Lyα feature 4 (NHI_DLA4) (phys.columnDensity)
  NHIDLA5 [-] (n) [20.5/20.6] Absorber column density for damped Lyα feature 5 (NHI_DLA5) (phys.columnDensity)
  q_zDLA1  Confidence of detection for damped Lyα feature 1 (CONF_DLA1) Binary flag (meta.code.qual)
  q_zDLA2  Confidence of detection for damped Lyα features (CONF_DLA2) Binary flag (meta.code.qual)
  q_zDLA3  Confidence of detection for damped Lyα features (CONF_DLA3) Binary flag (meta.code.qual)
  q_zDLA4  Confidence of detection for damped Lyα features (CONF_DLA4) Binary flag (meta.code.qual)
  q_zDLA5  Confidence of detection for damped Lyα features (CONF_DLA5) Binary flag (meta.code.qual)
  PBAL   [-1/1] BAL probability (BAL_PROB) (Note G8)   (stat.fit.goodness)
  BI(CIV) km/s (n) [/109061] BALnicity index for the CIV region (BI_CIV) (spect.line.eqWidth)
  e_BI(CIV) km/s (n) [0/3.1e+38] BI(CIV) uncertainty (ERR_BI_CIV) (stat.error)
  AI(CIV) km/s (n) [-618/121609] Absorption index for the CIV region (AI_CIV) (spect.index)
  e_AI(CIV) km/s (n) [0/10897] AI(CIV) uncertainty (ERR_AI_CIV) (stat.error)
  BI(SIIV) km/s (n) [/85220] BALnicity index for the SiIV region (BI_SIIV) (spect.line.eqWidth)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  e_BI(SIIV) km/s (n) [0/1985] BI(SIIV) uncertainty (ERR_BI_SIIV) (stat.error)
  AI(SIIV) km/s (n) [/45671] Absorption index for the SiIV region (AI_SIIV) (spect.index)
  e_AI(SIIV) km/s (n) [0/1622] AI(SIIV) uncertainty (ERR_AI_SIIV) (stat.error)
  Btarg1  (n) BOSS target selection flag for the main survey (BOSS_TARGET1) Binary flag (meta.code)
  eBOSST0  (n) eBOSS target selection flag for the pilot survey (SEQUELS) (EBOSS_TARGET0) Binary flag (meta.code)
  eBOSST1  (n) eBOSS target selection flag for the main survey (EBOSS_TARGET1) Binary flag (meta.code)
  eBOSST2  (n) eBOSS target 2 selection flag for the main survey (EBOSS_TARGET2) Binary flag (meta.code)
  Atarg1  (n) BOSS target selection flag for the ancillary surveys (ANCILLARY_TARGET1) Binary flag (meta.code)
  Atarg2  (n) BOSS target 2 selection flag for the ancillary surveys (ANCILLARY_TARGET2) (meta.code)
  NspI   [0/1] Number of additional spectra from SDSS-I/II (NSPEC_SDSS) (Note G9)   (meta.number)
  NspBOSS   [0/73] Number of additional spectra from BOSS/eBOSS (NSPEC_BOSS) (Note G9)   (meta.number)
  Nsp  (n) [0/73] Total number of additional spectra (NSPEC) (Note G9)   (meta.number)
  Sky  (n) [2] SDSS photometric sky version number (SKYVERSION) (meta.number)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  Run  (n) [94/8162] SDSS imaging run number of photometric measurements (RUN_NUMBER) (meta.id)
  Rerun  (n) [157/301] SDSS photometric processing rerun number (RERUN_NUMBER) (meta.id)
  Cam  (n) [1/6] SDSS camera column number (CAMCOL_NUMBER) (meta.id)
  Field  (n) [11/872] SDSS field number (FIELD_NUMBER) (meta.id;obs.field)
  photID  (n) [2/4093] SDSS photometric ID (ID_NUMBER) (meta.id;phot)
  lambda 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)
  Offset um [0/300] Backstopping offset distance (ZOFFSET) (pos.distance;instr.offset;arith.diff)
  Xfocal mm [-325/325] Hole x-axis position in focal plane (pos.cartesian.x;instr.plate)
  Yfocal mm [-326/326] Hole y-axis position in focal plane (pos.cartesian.y;instr.plate)
  Chunk (char) Name of tiling chunk (from the plate-list product) (obs.field)
  Tile   [-3/17691] Tile number (obs.field)
  SN2   [0/334] Overall (S/N)2 measure for plate, minimum of all four cameras (PLATESN2) (stat.snr)
  Fu 3.63uJy (n) [-45/2001] PSF flux in u-band in nMgy (not corrected for Galactic extinction) (PSFFLUXu) (phot.mag;em.opt.U)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  Fg 3.63uJy (n) [-8.5/4455] PSF flux in g-band in nMgy (not corrected for Galactic extinction) (PSFFLUXg) (phot.mag;em.opt.B)
  Fr 3.63uJy (n) [-12/4398] PSF flux in r-band in nMgy (not corrected for Galactic extinction) (PSFFLUXr) (phot.mag;em.opt.R)
  Fi 3.63uJy (n) [-31/3796] PSF flux in i-band in nMgy (not corrected for Galactic extinction) (PSFFLUXi) (phot.mag;em.opt.I)
  Fz 3.63uJy (n) [-54/10794] PSF flux in z-band in nMgy (not corrected for Galactic extinction) (PSFFLUXz) (phot.mag;em.opt.I)
  IVFu 3.63uJy (n) [0/245] Inverse variance of Fu in nMgy (PSFFLUX_IVARu) (phot.mag;em.opt.U)
  IVFg 3.63uJy (n) [0/762] Inverse variance of Fg in nMgy (PSFFLUX_IVARg) (phot.mag;em.opt.B)
  IVFr 3.63uJy (n) [0/262] Inverse variance of Fr in nMgy (PSFFLUX_IVARr) (phot.mag;em.opt.R)
  IVFi 3.63uJy (n) [0/129] Inverse variance of Fi in nMgy (PSFFLUX_IVARi) (phot.mag;em.opt.I)
  IVFz 3.63uJy (n) [0/14] Inverse variance of Fz in nMgy (PSFFLUX_IVARz) (phot.mag;em.opt.I)
  umag mag (n) [14.2/30.9] PSF (AB) magnitude in u band (not corrected for Galactic extinction) (PSFMAGu) (phot.mag;em.opt.U)
  gmag mag (n) [13.3/30.1] PSF (AB) magnitude in g band (not corrected for Galactic extinction) (PSFMAGg) (phot.mag;em.opt.B)
  rmag mag (n) [13.3/29.8] PSF (AB) magnitude in r band (not corrected for Galactic extinction) (PSFMAGr) (phot.mag;em.opt.R)
  imag mag (n) [13.5/30] PSF (AB) magnitude in i band (not corrected for Galactic extinction) (PSFMAGi) (phot.mag;em.opt.I)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  zmag mag (n) [12.4/27.5] PSF (AB) magnitude in z band (not corrected for Galactic extinction) (PSFMAGz) (src.redshift;pos.heliocentric)
  e_umag mag (n) [0.007/4.6e+6] umag uncertainty (PSFMAGERRu) (stat.error;phot.mag)
  e_gmag mag (n) [0.0006/513] gmag uncertainty (PSFMAGERRg) (stat.error;phot.mag)
  e_rmag mag (n) [0.0005/652] rmag uncertainty (PSFMAGERRr) (stat.error;phot.mag)
  e_imag mag (n) [0.001/2.4e+6] imag uncertainty (PSFMAGERRi) (stat.error;phot.mag)
  e_zmag mag (n) [0.008/422] zmag uncertainty (PSFMAGERRz) (stat.error;phot.mag)
  Extu mag (n) [0.009/3.8] Galactic extinction in the u-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONu) (phys.absorption)
  Extg mag (n) [0.007/2.8] Galactic extinction in the g-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONg) (phys.absorption)
  Extr mag (n) [0.005/2.1] Galactic extinction in the r-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONr) (phys.absorption)
  Exti mag (n) [0.003/1.6] Galactic extinction in the i-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONi) (phys.absorption)
  Extz mag (n) [0.002/1.1] Galactic extinction in the z-band from Schlafly & Finkbeiner (2011ApJ...737..103S) (EXTINCTIONz) (phys.absorption)
  SNR   [-1.8/120] S/N median value for all good pixels in the five bands (SN_MEDIAN_ALL) (stat.snr)
  Sp  Display the SDSS data for this quasar (meta.ref.url)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
elapse time 0