VizieR

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

VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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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/892/105/4lac(c)4LAC high (|b|>10deg) and low (|b|<10deg) Galactic latitude sources (original column names in green) (3207 rows)
2.J/ApJ/892/105/table5(c)3LAC sources not present in 4LAC (93 rows)
3.J/ApJ/892/105/table6Non-blazar objects and misaligned AGN (69 rows)
4.J/ApJ/892/105/table7Properties of the 4LAC Very-High-Energy (VHE) AGN (78 rows)

Simple ConstraintList Of Constraints
 
Standard Original
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  (1+3)Group (char) Latitude grouping (high or low) (meta.id)
   (1+3+4)4FGL (char) (i) 4FGL name (JHHMM.m+DDMMa) (Source_Name) (meta.id;meta.main)
  (1)RAJ2000 deg (i) Right ascension (J2000) (RAJ2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 deg (i) Declination (J2000) (DEJ2000) (pos.eq.dec;meta.main)
  (1)GLON deg Galactic longitude (pos.galactic.lon)
  (1)GLAT deg Galactic latitude (pos.galactic.lat)
  (1)Sig   [4/444] Source significance in σ units over the 50MeV-1TeV band (Signif_Avg) (stat.fit.goodness;arith.ratio)
  (1)F1000i ph/cm2/s [8.8e-12/9.9e-8] Integral photon flux from 1 to 100GeV (Flux1000) (phot.flux.density;em.gamma.hard)
  (1)e_F1000i ph/cm2/s [4.9e-12/6e-10] F1000i 1σ error (Unc_Flux1000) (stat.error)
  (1)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
  (1)e_EF100 mW/m2 [1.7e-13/6.5e-12] EF100 1σ error (Unc_Energy_Flux100) (stat.error)
  (1)Mod (char) Spectral type in the global model (PowerLaw, LogParabola, PLSuperExpCutoff) (SpectrumType) (src.spType;meta.modelled)
  (1)PLGam   [1.39/3.5] Photon index when fitting with PowerLaw (PL_Index) (spect.index)
  (1)e_PLGam   [0.003/0.33] PLGam 1σ error (Unc_PL_Index) (stat.error)
  (1)Epiv MeV [137.8/25099.3] Pivot Energy (Pivot_Energy) (phys.energy)
  (1)LPalpha   [-0.34/3.6] Photon index at Pivot_Energy (α) when fitting with LogParabola (LP_Index) (spect.index)
  (1)e_LPalpha   [0.004/3] LPalpha 1σ error (Unc_LP_Index) (stat.error)
  (1)LPbeta   [-0.17/1] Curvature parameter (β) when fitting with LogParabola (LP_beta) (stat.fit.param)
  (1)e_LPbeta  (n) [0.001/1.5] LPbeta 1σ error (Unc_LP_beta) (stat.error)
  (1)Flags   [0/2096] Analysis flags (0=no warning) Binary flag; see text and Table 5 for more explanations (meta.code.error)
   (ALL)Class (char) Class designation for associated source (src.class)
  (1)Assoc1 (char) Name of identified or likely associated source (meta.id.assoc)
  (1)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
  (1)ProbLR   [0/1] Probability of association according to the Likelihood Ratio method (ASSOC_PROB_LR) (stat.fit.goodness)
  (1)CCat (char) Counterpart catalog driving the association (Counterpart_Catalog) (Note 1)   (meta.id;meta.dataset)
  (1)RACdeg deg Right ascension of the counterpart Assoc1 (J2000) (RA_Counterpart) (pos.eq.ra)
  (1)DECdeg deg Declination of the counterpart Assoc1 (J2000) (DEC_Counterpart) (pos.eq.dec)
  (1)errCPos deg [3.8e-8/2.5] 95% precision of the counterpart localization (Unc_Counterpart) (meta.code.qual;instr.precision)
  (1)RFC (char) Name of the VLBI counterpart (JHHMM+DDMM) (VLBI_Counterpart) (meta.id.cross)
  (1)Gaia  (n) Name of the Gaia DR2 counterpart established via the VLBI position (Gaia_Counterpart) (meta.id.cross)
  (1)Gmag mag (n) [12.8/21.5] Gaia G-band magnitude (Gaia_G_Magnitude) (phot.mag;em.opt)
  (1+3+4)z  (n) [1.7e-5/4.4] Redshift (Redshift) (src.redshift)
  (1)SEDCl (char) SED-based class (HSP, ISP or LSP) (SED_class) (src.spType)
  (1)nu Hz [0/1.2e+19] Synchrotron-peak frequency in observer frame (nu_syn) (em.freq;obs.field)
  (1)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)
  (1+4)Var   [0.3/50906] Variability index (Variability_Index) (src.var.index)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)fVar   [0/2.6] Fractional variability (Frac_Variability) (src.var.index)
  (1)e_fVar   [0.02/10] FVar 1σ error (Unc_Frac_Variability) (stat.error)
  (1)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)
  (1)VHE  (n)Display data for this Very-High-Energy AGN (link to Table 7) (meta.ref.url)
  (1)Pec  (n)Display data for this non-blazar object (link to Table 6) (meta.ref.url)
  (1+2)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (2)3FGL (char) 3FGL Name (meta.id;meta.main)
  (2)CName (char) Counterpart Name (meta.id)
  (2)n_3FGL (char) Reason for 3LAC source not present in 4LAC (Note 2)   (meta.note)
  (2)_RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  (2)_DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  (3+4)OName (char) Other name (meta.id)
  (3+4)Photon   [1.44/2.85] Photon Index (spect.index)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (3+4)e_Photon   [0.01/0.24] Uncertainty in Photon Index (stat.error)
  (3)Dist Mpc (n) [0.69/171] Distance (pos.distance;pos.heliocentric)
  (4)LL (char) [*] * = low-latitude sources not in 4LAC (meta.code)
  (4)SED (char) SED Class (Note 2)   (meta.code.class)

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