VizieR

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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

  
J/ApJS/271/20
  Broad emission line of 4FGL blazars (Chen+, 2024)
ReadMe+ftp
2024ApJS..271...20C
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJS/271/20/table1The sample of 979 Fermi blazars (979 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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)
  sp (char) Display the emission line fluxes of this source (link to Table 2) ((unassigned);phys.veloc.orbital;arith.diff;pos.geocentric)
  4FGL (char) (i) 4FGL-DR4 catalog identifier (JHHMM.m+DDMM) ((unassigned);(unassigned);(unassigned);spect.line.veloc;arith)
  Name (char) Other name ((unassigned);phys.veloc.orbital;arith.diff;spect.line.veloc)
  z   [0.027/4.4] Spectroscopic redshift (spect.index;instr.baseline;(unassigned);pos.parallax;meta.main)
  C1 (char) 4FGL-DR4 catalog classification (Note 1)   ((unassigned);(unassigned);(unassigned);pos.galactic;phys.atmol.sweight;meta.main)
  C2 (char) Yang+ 2022, J/ApJS/262/18 classification ((unassigned);(unassigned);(unassigned);pos.galactic;phys.atmol.sweight;meta.main)
  lognu [Hz] (n) [12.1/18.2] Log peak frequency (Note 2)   ((unassigned);(unassigned);arith.factor;instr.spect)
  F0.1-100 mW/m2/sr [5e-13/7.4e-10] The 0.1-100GeV gamma-ray flux; erg/cm2/sr ((unassigned);(unassigned);(unassigned);meta.abstract;(unassigned);(unassigned))
  alpha   [1.4/3.3] 4FGL-DR4 catalog photon spectral index ((unassigned);(unassigned);(unassigned);phys.abund.Y;meta.main)
  logLg [10-7W] [42.8/48.9] Log 0.1-100GeV gamma-ray luminosity; erg/s ((unassigned);phys.luminosity.fun;arith.factor;(unassigned);(unassigned);(unassigned))
  logLBLR [10-7W] [40.4/46.7] Log Broad-Line Region luminosity; erg/s ((unassigned);phys.veloc.orbital;arith.diff;(unassigned))
  r_logLBLR (char) Reference code for logLBLR (Note 3)   ((unassigned);(unassigned);(unassigned);phys.veloc.dispersion;(unassigned))
  delta   [0.45/88.6] Doppler factor from this work ((unassigned);(unassigned);(unassigned);instr.beam)
  DR3  (n)Display data from 4FGL-DR3 (IX/67) ((unassigned);(unassigned);arith.factor;pos.geocentric)
  Y22  (n)Display data from Yang+ 2022, J/ApJS/262/18 ((unassigned);phys.veloc.orbital;arith.diff;pos.geocentric)
  Simbad  ask the Simbad data-base about this object ((unassigned);phys.veloc.orbital;arith.diff;pos.geocentric)
  NED  ask the NED data-base about this object ((unassigned);(unassigned);(unassigned);pos.geocentric)
  _RA deg Positions from SIMBAD or from the 4FGL-DR4 (https://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/gll_psc_v32.reg) (right ascension part) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned);arith)
  _DE deg Positions from SIMBAD or from the 4FGL-DR4 (https://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/gll_psc_v32.reg) (declination part) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned);arith)

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  

The following problems were encountered in this VizieR run:
****Error execute query: UPDATE METAstat set nother=nother+1, tother=846444871 Where phase=3 and catid=22710020
**** 
**** --POSTGRES MSG db=1
**** Report from: stdb_pg,     Status: STDB_ERR 
****ERROR:  invalid page in block 0 of relation base/16403/6104 
****ERROR:  invalid page in block 0 of relation base/16403/6104
If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR223278.err (2026-10-27T19:34:30)
-3
-source=J/ApJS/271/20/table1
-ref=VIZ6ae0fcc73682e
elapse time 1