VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .
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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/464/211
  Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007)
ReadMe+ftp
2007A&A...464..211A
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/464/211/catalog(c)Cygnus OB2 source catalog: X-ray sources and near-IR counterparts (tables 1 and 2 of paper) (1003 rows)
2.J/A+A/464/211/table3X-ray source spectroscopy (580 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  (1)n_[AFM2007] (char) S indicates that X-ray spectroscopy is available in table3 (meta.ref.url)
   (ALL)[AFM2007]  (i) Sequential number (meta.record)
  (1)CXOCYG (char) Name (HHMMSS.ss+DDMMSS.s) CXOCYG JHHMMSS.ss+DDMMSS.s in Simbad (meta.id)
  (1)RAJ2000 "h:m:s" (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
  (1)ePos arcsec rms uncertainty on position (stat.error)
  (1)Theta arcmin Off-axis angle (instr.offset)
  (1)Signi  Significance of detection (stat.likelihood;obs)
  (1)Area pix Source extraction area (phys.area)
  (1)fPSF   [0/1] PSF fraction of source events within the extraction area, assuming E=1.49keV (instr.saturation)

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

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)e_Jmag mag (n) rms uncertainty on Jmag (stat.error;phot.mag;em.IR.J)
  (1)Hmag mag (n) 2MASS H magnitude (phot.mag;em.IR.H)
  (1)e_Hmag mag (n) rms uncertainty on Hmag (stat.error;phot.mag;em.IR.H)
  (1)Ksmag mag (n) 2MASS Ks magnitude (phot.mag;em.IR.K)
  (1)e_Ksmag mag (n) rms uncertainty on Ksmag (stat.error;phot.mag;em.IR.K)
  (1)q_Jmag (char) J band photometric quality flag (Note 1)   (meta.code.qual)
  (1)q_Hmag (char) H band photometric quality flag (Note 1)   (meta.code.qual)
  (1)q_Ksmag (char) Ks band photometric quality flag (Note 1)   (meta.code.qual)
  (1)AV mag (n) Absorption in V band (phot.mag;em.opt.V)
  (1)n_AV (char) [n] n indicates stars with unconstrained AV (meta.note)
  (2)Counts  Counts Background subtracted counts in the spectra (phot.count;em.X-ray)
  (2)log(NH) cm-2 Best fit hydrogen column density (phys.columnDensity;meta.modelled)
  (2)e_log(NH) cm-2 rms uncertainty on log(NH) (stat.error)
  (2)kT keV (n) Plasma temperature (phys.temperature)
  (2)e_kT keV (n) rms uncertainty on kT (stat.error;phys.energy)
  (2)log(EM) cm-3 Emission measure (phys.emissMeasure)
  (2)chi2  reduced chi2 value for the spectral fit (stat.fit.chi2)
  (2)dof  Degree of freedom for the spectral fit (stat.fit.dof)

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