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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/A+A/490/641
 X-ray sources toward NGC 2808 (Servillat+, 2008)
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img(gal)
1.J/A+A/490/641/table1Detected Chandra sources in the direction of NGC 2808 (113 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)
  [SDW2008]  Sequential number (meta.record)
  Det (char) [wh] Detection method (WAVDETECT or by hand) (meta.code)
  XMM (char) XMM-Newton ID (Note 1)   (meta.id)
  RAJ2000 "h:m:s" Right ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" Declination (J2000) (pos.eq.dec;meta.main)
  Error arcsec 1sigma detection positional error (stat.error)
  Cts ct Number of X-ray counts (phot.count;em.X-ray)
  FluxC 10-17W/m2Chandra flux (10–14erg/cm2/s) (phot.flux;em.X-ray)
  e_FluxC 10-17W/m2rms uncertainty on Chandra flux (stat.error)
  FluxX 10-17W/m2(n) XMM flux (10–14erg/cm2/s) (phot.flux;em.X-ray)
  e_FluxX 10-17W/m2(n) rms uncertainty on XMM flux (stat.error)
  HRC  Chandra hardness ratio (Note 2)   (phot.flux;arith.ratio)
  e_HRC  rms uncertainty on Chandra hardness ratio (stat.error)
  HRX  (n) XMM hardness ratio (Note 2)   (phot.flux;arith.ratio)
  e_HRX  (n) rms uncertainty on XMM hardness ratio (stat.error)
  NH 10+22cm-2 [0.12] Absorption column density best fit (phys.columnDensity;meta.modelled)
  PH  Power law of photon index best fit (spect.index)
  KS  Kolmogorov-Smirnov probability of constancy (src.var.index)

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