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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

  Optical counterparts of ROSAT X-ray in 2 fields (Greiner+, 2015)
Post annotation
1.J/A+A/575/A42/table1Main X-ray data of the ROSAT sources in 26 Com (238 rows)

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  Xseq  (i) Running number of the X-ray source (meta.number)
  RAJ2000 "h:m:s" (i) Right Ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
  1RXS (char) ROSAT All-sky Survey Name (IX/10, IX/29) (;meta.main)
  ePos arcsec (n) 90% confidence error circle (stat.error;
  CR ct/s [0.008/5.7] ROSAT PSPC count rate (phot.count;em.X-ray)
  HR1   [-1/1] Hardness ratio 1 (Note 1)   (phot.flux;arith.ratio)
  e_HR1  Hardness ratio 1 error (stat.error)
  HR2   [-1/1] Hardness ratio 2 (Note 1)   (phot.flux;arith.ratio)
  e_HR2  Hardness ratio 2 error (stat.error)
  Flux 10-16W/m2X-ray flux (in 10–13erg/cm2/s) (phot.flux;em.X-ray)
  Nc  (n)Number of optical conterparts (meta.number)
  ID (char) [a-h] Reference to counterpart in tables 8 and 9 (Note 2)   (
  Comm (char) Comments for reference to counterpart in tables 8 and 9 (Note 2)   (meta.note)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)

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