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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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 X-ray variability of M31 central field (Hofmann+, 2013)
Post annotation
1.J/A+A/555/A65/table1Source catalogue with general source information (318 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)
  SRCID   [1/318] Source identification number (
  Obs  (n) [62] Number of observations for this source (table2) (meta.number)
  RAJ2000 deg Right ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg Declination (J2000) (pos.eq.dec;meta.main)
  ePos arcsec Positional error (Note 1)   (stat.error;pos)
  ctN ct Net counts (phot.count;em.X-ray)
  e_ctN ct Error of net counts (stat.error)
  ctBkg ct Net background counts (phot.count;em.X-ray)
  CRN ct/s Net count rate (phot.count;em.X-ray)
  e_CRN ct/s Error of net count rate (stat.error)

ALL cols
(n) indicates a possible blank or NULL column  
  CRBkg ct/s Background count rate (phot.count;em.X-ray)
  e_CRBkg ct/s Error of background count rate (stat.error)
  ExpTime s Exposure time (time.duration;obs.exposure)
  Signi  Highest detection significance (;instr.saturation;stat.max)
  Res  Detection-image resolution (binning) (Note 2)   (pos.angResolution)
  Flux mW/m2 Flux in 0.2-10keV band, in erg/s/cm2 (Note 3)   (phot.flux;em.X-ray.medium)
  e_Flux mW/m2 Flux error (stat.error;phot.flux)
  Lum 10-7W Luminosity, assuming a distance of 780kpc (phys.luminosity;em.X-ray)
  e_Lum 10-7W Luminosity error (stat.error)
  DistNN arcsec Distance to nearest neighbour (pos.angDistance)
  svar  Source variability parameter (Fmax-Fmin)/sqrt(σmax2+σmin2) (;src.var)
  fvar  Highest source flux ratio (Fmax/Fmin) (phot.flux;arith.ratio)
  ndet   [0/1] Number of detections (Note 8)   (meta.number)

ALL cols
(n) indicates a possible blank or NULL column  
  ssvar  Highest svar between observations (;src.var)
  Fmax mW/m2 Maximum flux (phot.flux;em.X-ray)
  e_Fmax mW/m2 Error of maximum flux (stat.error)
  Fmin mW/m2 Minimum flux (phot.flux;em.X-ray)
  e_Fmin mW/m2 Error of minimum flux (stat.error)
  lcC (char) [HV OB] Light curve classification: HV (highly variable) or OB (outburst) (meta.code;src.var)
  nova (char) Nova name(s) (Note 4)   (
  glc (char) Globular-cluster name (Note 5)   (
  Class (char) Source classification (Note 6)   (meta.bib)
  XC  (n)Number of cross-correlations (xcorr) (meta.ref.url)
  Com (char) Comments and references (Note 7)   (meta.ref)
  LC  Light Curve (meta.ref.url)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)

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