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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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  Chandra survey of 13-h XMM/ROSAT survey (McHardy+, 2003)
Post annotation
1.J/MNRAS/342/802/table2Flux-ordered catalogue of Chandra sources and their optical counterparts. (214 rows)

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)
  m_[MGN2003] (char) indicates ROSAT sources (table 5) or alternative optical counterparts (table A1)
  [MGN2003]  (i) Sequential number of Chandra source
  n_[MGN2003] (char) [*+o] Notes (Note 1)   
  Alt (char) [UP] Flag for alternative optical candidate (Note G1)   
  Flux aW/m2 0.5-7.0keV flux
  chi2  Cash ξ2 value for the Chandra source
  RAJ2000 "h:m:s" Chandra right ascension (J2000)
  DEJ2000 "d:m:s" Chandra declination (J2000)
  DRA(O-X) arcsec (n) Optical-Chandra offset in right ascension
  DDE(O-X) arcsec (n) Optical-Chandra offset in declination
  D(O-X) arcsec (n) Total optical-Chandra offset
  l_Rmag (char) [≤ >] Limit flag on Rmag
  Rmag mag R magnitude of the optical counterpart
  OffC arcmin Chandra off-axis angle of the source
  OffX arcmin XMM off-axis angle of the source
  FWHM arcsec (n) Fulll Width at Half Maximum
  S/G  (n) [0/1] Stellarity of the optical counterpart 0 for galaxy, 1 for star

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