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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

  Spatial variation in fine-structure constant (King+, 2012)
Post annotation
1.J/MNRAS/422/3370/tablea1Table of all VLT and Keck da/a values (295 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)
  Seq  Sequential number (meta.record)
  QSO (char) QSO name (JHMMSS+DDMMSS) (;meta.main)
  zem  Emission redshift (src.redshift)
  zabs  Absorption redshift (src.redshift)
  da/a 10-5 Value of (Δα)/α = (αzα0)/α0z at the zabs redshift) (
  e_da/a 10-5 Error on da/a (stat.error)
  Sample (char) Sample (Keck or VLT) (src.sample)
  Flag   [1/3] sigrandflag value (Note 1)   (meta.code.error)
  Out   [0/1] indicates whether the system was identified as an outlier and removed from consideration (Note 2)   (meta.code)
  SimbadName (char) Designation understandable by the Simbad data-base (
  _RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  _DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)

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