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

  Fourth catalog of Fermi LAT-detected AGNs (4LAC) (Ajello+, 2020)
Post annotation
1.J/ApJ/892/105/4lac4LAC high (|b|>10deg) and low (|b|<10deg) Galactic latitude sources (original column names in green) (3207 rows)

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)
  Group (char) Latitude grouping (high or low) (
  4FGL (char) (i) 4FGL name (JHHMM.m+DDMMa) (Source_Name) (;meta.main)
  RAJ2000 deg (i) Right ascension (J2000) (RAJ2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination (J2000) (DEJ2000) (pos.eq.dec;meta.main)
  GLON deg Galactic longitude (pos.galactic.lon)
  GLAT deg Galactic latitude (
  Sig   [4/444] Source significance in σ units over the 50MeV-1TeV band (Signif_Avg) (;arith.ratio)
  F1000i ph/cm2/s [8.8e-12/9.9e-8] Integral photon flux from 1 to 100GeV (Flux1000) (phot.flux.density;em.gamma.hard)
  e_F1000i ph/cm2/s [4.9e-12/6e-10] F1000i 1σ error (Unc_Flux1000) (stat.error)
  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) (phot.flux.density;em.gamma.hard)

ALL cols
 (i)indexed column
  e_EF100 mW/m2 [1.7e-13/6.5e-12] EF100 1σ error (Unc_Energy_Flux100) (stat.error)
  Mod (char) Spectral type in the global model (PowerLaw, LogParabola, PLSuperExpCutoff) (SpectrumType) (src.spType;meta.modelled)
  PLGam   [1.39/3.5] Photon index when fitting with PowerLaw (PL_Index) (spect.index)
  e_PLGam   [0.003/0.33] PLGam 1σ error (Unc_PL_Index) (stat.error)
  Epiv MeV [137.8/25099.3] Pivot Energy (Pivot_Energy) (
  LPalpha   [-0.34/3.6] Photon index at Pivot_Energy (α) when fitting with LogParabola (LP_Index) (spect.index)
  e_LPalpha   [0.004/3] LPalpha 1σ error (Unc_LP_Index) (stat.error)
  LPbeta   [-0.17/1] Curvature parameter (β) when fitting with LogParabola (LP_beta) (
  e_LPbeta  (n) [0.001/1.5] LPbeta 1σ error (Unc_LP_beta) (stat.error)
  Flags   [0/2096] Analysis flags (0=no warning) Binary flag; see text and Table 5 for more explanations (meta.code.error)
  Class (char) Class designation for associated source (src.class)
  Assoc1 (char) Name of identified or likely associated source (
  ProbBY  (n) [0/1] Probability of association according to the Bayesian method (ASSOC_PROB_BAY) (

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) (
  CCat (char) Counterpart catalog driving the association (Counterpart_Catalog) (Note 1)   (;meta.dataset)
  RACdeg deg Right ascension of the counterpart Assoc1 (J2000) (RA_Counterpart) (pos.eq.ra)
  DECdeg deg Declination of the counterpart Assoc1 (J2000) (DEC_Counterpart) (pos.eq.dec)
  errCPos deg [3.8e-8/2.5] 95% precision of the counterpart localization (Unc_Counterpart) (meta.code.qual;instr.precision)
  RFC (char) Name of the VLBI counterpart (JHHMM+DDMM) (VLBI_Counterpart) (
  Gaia  (n) Name of the Gaia DR2 counterpart established via the VLBI position (Gaia_Counterpart) (
  Gmag mag (n) [12.8/21.5] Gaia G-band magnitude (Gaia_G_Magnitude) (phot.mag;em.opt)
  z  (n) [1.7e-5/4.4] Redshift (Redshift) (src.redshift)
  SEDCl (char) SED-based class (HSP, ISP or LSP) (SED_class) (src.spType)
  nu Hz [0/1.2e+19] Synchrotron-peak frequency in observer frame (nu_syn) (em.freq;obs.field)
  nuFnu mW/m2 [0/7.9e-10] Spectral energy distribution at synchrotron-peak frequency in erg/cm2/s units (nuFnu_syn) (phot.flux.density;em.gamma.hard)
  Var   [0.3/50906] Variability index (Variability_Index) (src.var.index)
  fVar   [0/2.6] Fractional variability (Frac_Variability) (src.var.index)
  e_fVar   [0.02/10] FVar 1σ error (Unc_Frac_Variability) (stat.error)
  Emax GeV (n) [4.1/913] Energy of the highest-energy ULTRACLEANVETO photon with association probability P>0.95 (Highest_energy) (;stat.max;em.gamma)
  VHE  (n)Display data for this Very-High-Energy AGN (link to Table 7) (meta.ref.url)
  Pec  (n)Display data for this non-blazar object (link to Table 6) (meta.ref.url)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
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