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

  
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. (meta.record)
  Group (char) Latitude grouping (high or low) (meta.id)
  4FGL (char) (i) 4FGL name (JHHMM.m+DDMMa) (Source_Name) (meta.id;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 (pos.galactic.lat)
  Sig   [4/444] Source significance in σ units over the 50MeV-1TeV band (Signif_Avg) (stat.fit.goodness;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) (phys.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) (stat.fit.param)
  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 (meta.id.assoc)
  ProbBY  (n) [0/1] Probability of association according to the Bayesian method (ASSOC_PROB_BAY) (stat.fit.goodness)

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) (stat.fit.goodness)
  CCat (char) Counterpart catalog driving the association (Counterpart_Catalog) (Note 1)   (meta.id;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) (meta.id.cross)
  Gaia  (n) Name of the Gaia DR2 counterpart established via the VLBI position (Gaia_Counterpart) (meta.id.cross)
  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) (phys.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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