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  Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007)
Post annotation
1.J/A+A/464/211/table3X-ray source spectroscopy (580 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)
  [AFM2007]  Sequential number (meta.record)
  Counts  Counts Background subtracted counts in the spectra (phot.count;em.X-ray)
  log(NH) cm-2 Best fit hydrogen column density (phys.columnDensity;meta.modelled)
  e_log(NH) cm-2 rms uncertainty on log(NH) (stat.error)
  kT keV (n) Plasma temperature (phys.temperature)
  e_kT keV (n) rms uncertainty on kT (stat.error;
  log(EM) cm-3 Emission measure (phys.emissMeasure)
  chi2  reduced chi2 value for the spectral fit (
  dof  Degree of freedom for the spectral fit (

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