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/A+A/684/A208
  Unassociated Fermi-LAT sources seen with eROSITA (Mayer+, 2024)
ReadMe+ftp
2024A&A...684A.208M
Similar Catalogs
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1.J/A+A/684/A208/candCorresponding list of sources which failed visual inspection (193 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)
  Seq (char) Rank of X-ray source by match probability (meta.id)
  4eRASS (char) eROSITA source ID following IAU naming conventions (meta.id;meta.main)
  RA_ICRS deg (i) Right ascension (ICRS) of X-ray source (pos.eq.ra;meta.main)
  DE_ICRS deg (i) Declination (ICRS) of X-ray source (pos.eq.dec;meta.main)
  epos arcsec One-sigma positional error of X-ray source (stat.error;pos)
  DetLike  X-ray detection likelihood (stat.likelihood)
  ExtLike  X-ray extent likelihood (stat.likelihood)
  CR ct/s X-ray count rate in 0.2-2.3keV (phot.count;em.X-ray)
  FeRASS mW/m2 X-ray source flux in 0.2-2.3keV, determined via an energy conversion factor from the count rate (phot.flux;em.X-ray)
  Name4FGL (char) Name of gamma-ray source in 4FGL-DR4 catalog (meta.id)

ALL cols		    
 (i)indexed column
  Class2-4FGL (char) Class of low-probability association of gamma-ray source in 4FGL-DR4 catalog (meta.code.class)
  Assoc2-4FGL (char) Low-probability association of gamma-ray source in 4FGL-DR4 catalog (stat.fit.goodness)
  RA4deg deg Right ascension (ICRS) of gamma-ray source (pos.eq.ra)
  DE4deg deg Declination (ICRS) of gamma-ray source (pos.eq.dec)
  amaj4FGL arcmin Semi-major axis of gamma-ray 95% error ellipse (phys.angSize.smajAxis;pos.errorEllipse)
  bmin4FGL arcmin Semi-minor axis of gamma-ray 95% error ellipse (phys.angSize.sminAxis;pos.errorEllipse)
  phi4FGL deg Position angle of gamma-ray error ellipse on the sky (pos.posAng;pos.errorEllipse)
  nu4FGL deg-2 Density of eRASS:4 X-ray sources within a 2deg radius around gamma-ray source (src.density)
  ExpField  Expectation value for the number of X-ray chance alignments (denominator in Eq. 4) (meta.number)
  F4FGL mW/m2 gamma-ray source flux in the range 100MeV-100GeV (phot.flux.density;em.gamma.hard)
  PriorPSR  Prior probability for a source to be a pulsar, rather than blazar, based on its gamma-ray properties (stat.fit.goodness)
  Prioryoungold  Prior probability for a source to be a young pulsar, rather than millisecond pulsar, based on its gamma-ray properties (stat.fit.goodness)
  dmahalanobis  Mahalanobis distance, i.e. the distance between X-ray and gamma-ray source positions, normalized by the total positional error in the given direction (pos.distance)

ALL cols		    
 (i)indexed column
  BFpos  Purely positional Bayes factor of the association, i.e. value of Eq. 4 with c=1 (pos)
  logFluxratio  Logarithmic gamma-to-X-ray flux ratio (phot.flux;arith.ratio)
  PriorfrAGN  Likelihood ratio, assuming AGN nature, of having a match rather than a background X-ray source based on only X-ray and gamma-ray fluxes (Eqs. 6 and 7) (stat.likelihood)
  PriorfrYNG  Likelihood ratio, assuming young pulsar nature, of having a match rather than a background X-ray source based on only X-ray and gamma-ray fluxes (Eqs. 6 and 7) (stat.likelihood)
  PriorfrMSP  Likelihood ratio, assuming millisecond pulsar nature, of having a match rather than a background X-ray source based on only X-ray and gamma-ray fluxes (Eqs. 6 and 7) (stat.likelihood)
  PiPSR  Combined posterior probability (Eq. 8) for the given X-ray and gamma-ray source to be matched, and to be of pulsar nature (stat.fit.goodness)
  PiAGN  Combined posterior probability (Eq. 8) for the given X-ray and gamma-ray source to be matched, and to be of AGN (blazar) nature (stat.fit.goodness)
  PiYNG  Combined posterior probability (Eq. 8) for the given X-ray and gamma-ray source to be matched, and to be of young pulsar nature (stat.fit.goodness)
  PiMSP  Combined posterior probability (Eq. 8) for the given X-ray and gamma-ray source to be matched, and to be of millisecond pulsar nature (stat.fit.goodness)
  Pi  Combined posterior probability (Eq. 8) for the given X-ray and gamma-ray source to be matched (stat.fit.goodness)
  Comment (char) Comment on the match, for instance, on possible alternative nature of the X-ray source (meta.note)

ALL cols		    
 (i)indexed column
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