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/ApJ/892/105
  Fourth catalog of Fermi LAT-detected AGNs (4LAC) (Ajello+, 2020)
ReadMe+ftp
2020ApJ...892..105A
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/892/105/4lac4LAC high (|b|>10deg) and low (|b|<10deg) Galactic latitude sources (original column names in green) (3207 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);(unassigned);arith.grad;phys.veloc)
  Group (char) Latitude grouping (high or low) ((unassigned);phys.veloc.orbital;arith.diff;spect.line.veloc)
  4FGL (char) (i) 4FGL name (JHHMM.m+DDMMa) (Source_Name) ((unassigned);phys.veloc.orbital;arith.diff;spect.line.veloc;arith)
  RAJ2000 deg Right ascension (J2000) (RAJ2000) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned);arith)
  DEJ2000 deg Declination (J2000) (DEJ2000) ((unassigned);(unassigned);(unassigned);(unassigned);arith)
  GLON deg Galactic longitude ((unassigned);(unassigned);(unassigned);(unassigned);meta.main)
  GLAT deg Galactic latitude (XXXXXXX)
  Sig   [4/444] Source significance in {sigma} units over the 50MeV-1TeV band (Signif_Avg) ((unassigned);phys.veloc.orbital;arith.diff;phys.polarization.circular;instr.param)
  F1000i ph/cm2/s [8.8e-12/9.9e-8] Integral photon flux from 1 to 100GeV (Flux1000) ((unassigned);(unassigned);(unassigned);phys.atmol.sWeight.nuclear;(unassigned);(unassigned))
  e_F1000i ph/cm2/s [4.9e-12/6e-10] F1000i 1{sigma} error (Unc_Flux1000) ((unassigned);(unassigned);(unassigned);time.age;meta.main)
  EF100 mW/m2 [6.4e-13/1.2e-9] Energy flux from 100MeV to 100GeV obtained by spectral fitting in erg/cm2/s units (Energy_Flux100) ((unassigned);phys.veloc.orbital;arith.diff;phys.atmol.sWeight.nuclear;(unassigned);(unassigned))

ALL cols		    
 (i)indexed column
  e_EF100 mW/m2 [1.7e-13/6.5e-12] EF100 1{sigma} error (Unc_Energy_Flux100) (stat.weight;instr;stat.min;time.age;meta.main)
  Mod (char) Spectral type in the global model (PowerLaw, LogParabola, PLSuperExpCutoff) (SpectrumType) (obs.param;(unassigned);arith.factor;pos.posAng;src.orbital.meanAnomaly)
  PLGam   [1.39/3.5] Photon index when fitting with PowerLaw (PL_Index) ((unassigned);phys.veloc.orbital;arith.diff;phys.abund.Y;meta.main)
  e_PLGam   [0.003/0.33] PLGam 1{sigma} error (Unc_PL_Index) ((unassigned);phys.veloc.orbital;arith.diff;time.age;meta.main)
  Epiv MeV [137.8/25099.3] Pivot Energy (Pivot_Energy) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned))
  LPalpha   [-0.34/3.6] Photon index at Pivot_Energy ({alpha}) when fitting with LogParabola (LP_Index) ((unassigned);phys.veloc.orbital;arith.diff;phys.abund.Y;meta.main)
  e_LPalpha   [0.004/3] LPalpha 1{sigma} error (Unc_LP_Index) ((unassigned);phys.luminosity.fun;arith.grad;time.age;meta.main)
  LPbeta   [-0.17/1] Curvature parameter ({beta}) when fitting with LogParabola (LP_beta) ((unassigned);(unassigned);(unassigned);pos.bodyrc.lon;meta.main)
  e_LPbeta  (n) [0.001/1.5] LPbeta 1{sigma} error (Unc_LP_beta) ((unassigned);(unassigned);(unassigned);time.age;meta.main)
  Flags   [0/2096] Analysis flags (0=no warning) Binary flag; see text and Table 5 for more explanations ((unassigned);(unassigned);(unassigned);pos.galactic.lon)
  Class (char) Class designation for associated source ((unassigned);(unassigned);(unassigned);phys.atmol.sweight;meta.main)
  Assoc1 (char) Name of identified or likely associated source ((unassigned);(unassigned);(unassigned);src.class.color)
  ProbBY  (n) [0/1] Probability of association according to the Bayesian method (ASSOC_PROB_BAY) ((unassigned);phys.veloc.orbital;arith.diff;phys.polarization.circular;meta.main)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  ProbLR   [0/1] Probability of association according to the Likelihood Ratio method (ASSOC_PROB_LR) ((unassigned);phys.veloc.orbital;arith.diff;phys.polarization.circular;meta.main)
  CCat (char) Counterpart catalog driving the association (Counterpart_Catalog) (Note 1)   ((unassigned);(unassigned);(unassigned);spect.line.veloc;pos.wcs.crpix)
  RACdeg deg Right ascension of the counterpart Assoc1 (J2000) (RA_Counterpart) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned))
  DECdeg deg Declination of the counterpart Assoc1 (J2000) (DEC_Counterpart) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned))
  errCPos deg [3.8e-8/2.5] 95% precision of the counterpart localization (Unc_Counterpart) ((unassigned);(unassigned);(unassigned);pos.cartesian;phys.atmol.element)
  RFC (char) Name of the VLBI counterpart (JHHMM+DDMM) (VLBI_Counterpart) ((unassigned);phys.veloc.orbital;arith.diff;src.class.starGalaxy)
  Gaia  (n) Name of the Gaia DR2 counterpart established via the VLBI position (Gaia_Counterpart) ((unassigned);phys.veloc.orbital;arith.diff;src.class.starGalaxy)
  Gmag mag (n) [12.8/21.5] Gaia G-band magnitude (Gaia_G_Magnitude) ((unassigned);phys.veloc.orbital;arith.diff;stat.filling;(unassigned);(unassigned))
  z  (n) [1.7e-5/4.4] Redshift (Redshift) ((unassigned);(unassigned);(unassigned);pos.parallax;meta.main)
  SEDCl (char) SED-based class (HSP, ISP or LSP) (SED_class) ((unassigned);(unassigned);(unassigned);pos.posAng;meta.main)
  nu Hz [0/1.2e+19] Synchrotron-peak frequency in observer frame (nu_syn) ((unassigned);(unassigned);(unassigned);instr.spect;time.lifetime)
  nuFnu mW/m2 [0/7.9e-10] Spectral energy distribution at synchrotron-peak frequency in erg/cm2/s units (nuFnu_syn) (phot.mag;em.radio.400-750MHz;arith.factor;phys.atmol.sWeight.nuclear;(unassigned);(unassigned))
  Var   [0.3/50906] Variability index (Variability_Index) (meta.code.member;(unassigned);arith.grad;pos.wcs.crpix;meta.main)
  fVar   [0/2.6] Fractional variability (Frac_Variability) (phot.limbDark;instr.det.qe;stat.min;pos.wcs.crpix;meta.main)
  e_fVar   [0.02/10] FVar 1{sigma} error (Unc_Frac_Variability) ((unassigned);(unassigned);(unassigned);time.age;meta.main)
  Emax GeV (n) [4.1/913] Energy of the highest-energy ULTRACLEANVETO photon with association probability P>0.95 (Highest_energy) ((unassigned);(unassigned);(unassigned);(unassigned);pos.lsr;(unassigned);(unassigned))
  VHE  (n)Display data for this Very-High-Energy AGN (link to Table 7) ((unassigned);(unassigned);(unassigned);pos.geocentric)
  Pec  (n)Display data for this non-blazar object (link to Table 6) ((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)

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=846431758 Where phase=3 and catid=18920105
**** 
**** --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 
****error getting UCD 1095222231040 1020
If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR42578.err (2026-10-27T15:55:56)
-3
-source=J/ApJ/892/105/4lac
-ref=VIZ6ae0c98da652
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