VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

VizieR

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. ((unassigned);phys.veloc.orbital;arith.diff;phys.veloc)
  DR16Q  (n)Source is included in SDSS quasar-only catalog ((unassigned);phys.veloc.orbital;arith.diff;pos.geocentric)
  SDSS (char) SDSS-DR16 designation (HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME) ((unassigned);(unassigned);(unassigned);spect.line.veloc;arith)
  RAJ2000 deg (i) Right Ascension (J2000) (RA) ((unassigned);(unassigned);(unassigned);(unassigned);arith)
  DEJ2000 deg (i) [-17.53/84.44] Declination (J2000) (DEC) ((unassigned);(unassigned);(unassigned);(unassigned);arith)
  Plate  Spectroscopic plate number (Note G1)   ((unassigned);phys.veloc.orbital;arith.diff;time.lifetime)
  MJD  (i) [51608/58543] Spectroscopic Modified Julian Date (Note G1)   ((unassigned);phys.veloc.orbital;arith.diff;pos.centroid;meta.main)
  Fiber  Spectroscopic fiber number (FIBERID) (Note G1)   ((unassigned);phys.veloc.orbital;arith.diff;phys.veloc.orbital)
  QN (char) Object classification post-QuasarNET (Busca & Balland 2018arXiv180809955B) (AUTOCLASS_PQN) (Note 1)   ((unassigned);phys.veloc.orbital;arith.diff;pos.eq.dec)
  DR14Q (char) Object classification based only on the DR14Q algorithm (AUTOCLASS_DR14Q) ((unassigned);(unassigned);(unassigned);pos.galactic;phys.atmol.sweight;meta.main)
  QQN  Binary flag for QuasarNET quasar identification (1=QSO; -1=not processed by QuasarNET) (IS_QSO_QN) ((unassigned);(unassigned);(unassigned);pos.eq.dec)

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) ((unassigned);(unassigned);(unassigned);pos.parallax;arith.diff;meta.main)
  10K   [0/1] Binary flag indicating objects selected for random visual inspection (0=not selected) (RANDOM_SELECT) (Note G2)   ((unassigned);(unassigned);(unassigned);pos.eq.dec)
  z10K  (n) [-0.0075/5.01] Redshift from visual inspection of random set (Z_10K) ((unassigned);(unassigned);arith.diff;pos.parallax;arith.diff;meta.main)
  f_z10K  (n) [-1/3] Confidence rating for visual inspection redshift of random set (3:highest confidence) (Z_CONF_10K) (Note G3)   (spect.index;pos.wcs.crval;arith.grad;pos.eq.dec)
  C10K  Binary flag indicating if the automated pipeline classification and redshift were correct in the random set (PIPE_CORR_10K) (Note G4)   ((unassigned);(unassigned);(unassigned);pos.eq.dec)
  Q10K  Binary flag for random set quasar identification (1=QSO; -1=not randomly selected) (IS_QSO_10K) ((unassigned);(unassigned);(unassigned);pos.eq.dec)
  Prim   [0/1] Flag to indicate if observation is primary observation appearing in DR16Q or a duplicate (1=Primary) (PRIM_REC) ((unassigned);(unassigned);(unassigned);pos.eq.dec)
  THINGID  (n) SDSS identifier mainly for BOSS and eBOSS objects (THING_ID) ((unassigned);(unassigned);(unassigned);spect.line.veloc)
  zvis  (n) [0.001/7.02] Redshift from visual inspection (Z_VI) ((unassigned);phys.veloc.orbital;arith.diff;pos.parallax;arith.diff;meta.main)
  f_zvis  (n) [-1/3] Confidence rating for visual inspection redshift (3: highest confidence) (Z_CONF) ((unassigned);phys.veloc.orbital;arith.diff;pos.eq.dec)
  Class  (n) [0/50] Object classification from visual inspection (CLASS_PERSON) (Note 2)   ((unassigned);phys.veloc.orbital;arith.diff;pos.galactic;phys.atmol.sweight;meta.main)
  zDR12Q  (n) [0.04/6.5] Redshift taken from DR12Q (Cat. VII/279) visual inspection (Z_DR12Q) ((unassigned);(unassigned);(unassigned);pos.parallax;arith.diff;meta.main)
  QDR12Q  Flag indicating if an object was a quasar in DR12Q (1=QSO) (IS_QSO_DR12Q) ((unassigned);(unassigned);(unassigned);pos.eq.dec)

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) ((unassigned);(unassigned);(unassigned);pos.parallax;arith.diff;meta.main)
  QDR7Q  Flag indicating if an object was a quasar in DR7Q (IS_QSO_DR7Q) ((unassigned);phys.veloc.orbital;arith.diff;pos.eq.dec)
  zDR6Q  (n) [0.07/5.5] Redshift taken from DR6 (Hewett & Wild, 2010, J/MNRAS/405/2302) (Z_DR6Q_HW) ((unassigned);phys.veloc.orbital;arith.diff;pos.parallax;arith.diff;meta.main)
  zDR7Qa  (n) [0.06/5.5] Redshift taken from DR7 (Shen+ 2011, J/ApJS/194/45) catalog ancillary columns (Z_DR7Q_HW) (Note G5)   ( [****UnclosedBrace??****](unassigned);(unassigned);(unassigned);pos.parallax;arith.diff;meta [****ClosingBrace(s)Inserted****](unassigned);(unassigned);(unassigned);pos.parallax;arith.diff;met