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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/A+A/464/211
 Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007)
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img(gal)
1.J/A+A/464/211/catalogCygnus OB2 source catalog: X-ray sources and near-IR counterparts (tables 1 and 2 of paper) (1003 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)
  n_[AFM2007] (char) S indicates that X-ray spectroscopy is available in table3 (meta.ref.url)
  [AFM2007]  Sequential number (meta.record)
  CXOCYG (char) Name (HHMMSS.ss+DDMMSS.s) CXOCYG JHHMMSS.ss+DDMMSS.s in Simbad (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)
  ePos arcsec rms uncertainty on position (stat.error)
  Theta arcmin Off-axis angle (instr.offset)
  Signi  Significance of detection (stat.likelihood;obs)
  Area pix Source extraction area (phys.area)
  fPSF   [0/1] PSF fraction of source events within the extraction area, assuming E=1.49keV (instr.saturation)

ALL cols
    
   
  Counts ct Background-corrected extracted source counts in the 0.5-8.0keV band (in ct/photon) (phot.count;em.X-ray)
  ExpTime ks Exposure time (time.duration;obs.exposure)
  CRtot ct/ks Total (0.5-8.0keV) band count rate (Note 1)   (phot.count;em.X-ray)
  CRsoft ct/ks Soft (0.5-1.7keV) band count rate (Note 1)   (phot.count;em.X-ray)
  CRmed ct/ks Medium (1.7-2.8keV) band count rate (Note 1)   (phot.count;em.X-ray)
  CRhard ct/ks Hard (2.8-8.0keV) band count rate (Note 1)   (phot.count;em.X-ray)
  Ex keV Median photon energy (em.energy)
  Var  Logarithm of the KS-test significance, log(PKS) (Note 2)   (stat.probability;src.var)
  n_Var (char) [+] +: flare-like sources (meta.note)
  CXOAC (char) CXOACJ name (HHMMSS.ss+DDMMSS.s) (meta.id)
  2MASS (char) 2MASSJ name (HHMMSSss+DDMMSSs) (meta.id)
  Off arcsec (n) Offset (pos.angDistance)
  Jmag mag (n) 2MASS J magnitude (phot.mag;em.IR.J)

ALL cols
    
(n) indicates a possible blank or NULL column  
  e_Jmag mag (n) rms uncertainty on Jmag (stat.error;phot.mag;em.IR.J)
  Hmag mag (n) 2MASS H magnitude (phot.mag;em.IR.H)
  e_Hmag mag (n) rms uncertainty on Hmag (stat.error;phot.mag;em.IR.H)
  Ksmag mag (n) 2MASS Ks magnitude (phot.mag;em.IR.K)
  e_Ksmag mag (n) rms uncertainty on Ksmag (stat.error;phot.mag;em.IR.K)
  q_Jmag (char) J band photometric quality flag (Note 1)   (meta.code.qual)
  q_Hmag (char) H band photometric quality flag (Note 1)   (meta.code.qual)
  q_Ksmag (char) Ks band photometric quality flag (Note 1)   (meta.code.qual)
  AV mag (n) Absorption in V band (phot.mag;em.opt.V)
  n_AV (char) [n] n indicates stars with unconstrained AV (meta.note)

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