VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN 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/923/75
  X-ray/UV/opt counterparts of 4FGL gamma-ray sources (Kerby+, 2021)
ReadMe+ftp
2021ApJ...923...75K
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/923/75/table4*Fermi-LAT features for the unassociated sample investigated in this work, along with Swift-XRT and -UVOT parameters for all possible X-ray/UV/optical counterparts (multiple X-ray counterparts) (Note) (31 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. (meta.record)
  4FGL (char) Target 4FGL identifier (JHHMM.m+DDMM) (meta.id;meta.main)
  m_4FGL  (n)Number of X-ray possible counterparts to the Fermi source (meta.number)
  logFG [10-7W/cm2] [-12.1/-10.47] Log γ-ray flux; erg/s/cm2 (phot.flux.density;em.gamma.hard)
  GammaG   [1.7/2.71] The γ-ray photon index (spect.index)
  VarInd   [1.65/27.2] Year-over-year γ-ray variability index (meta.code;src.var.index)
  CurvInd   [0.05/10.7] The γ-ray curvature index (spect.index)
  SwXF4 (char) Target SwXF4 identifier (JHHMMSS.s+DDMMSS) (meta.id.cross)
  f_SwXF4 (char) [*] Flag on SwXF4 (Note 1)   (meta.code)
  logFX [10-7W/cm2] [-14.1/-8.97] Log X-ray 0.3-10keV flux; erg/s/cm2 (phot.flux;em.X-ray)
  GammaX   [0.01/7.9] X-ray photon index (spect.index)
  UVOT (char) Swift/UVOT filter used (meta.code;instr.filter)
  Vmag mag [13.37/21.7] Apparent V band Vega magnitude (Note G1)   (phot.mag;em.opt.V)
  Pbzr   [0.0015/1] The blazar probability (stat.fit.goodness)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)
  _RA deg (i) Positions from X-ray source name (SwXF4) (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Positions from X-ray source name (SwXF4) (declination part) (pos.eq.dec;meta.main)

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