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J/A+AS/132/83
 BVRI photometry of 7 BL Lac objects (Bai+ 1998)
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1998A&AS..132...83B
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1.J/A+AS/132/83/table2Photometric data of seven BL Lac objects (341 rows)

Simple ConstraintList Of Constraints
 
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)
  Date "Y:M:D" (n)Observation date (time.epoch)
  JD d Julian Date (time.epoch)
  mag mag Magnitude (phot.mag;em.opt.V)
  e_mag mag One sigma uncertainty on mag (stat.error)
  Band (char) [BVRI] Filter used (meta.code;instr.filter)
  Object (char) Name of the object observed (meta.id;meta.main)

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(n) indicates a possible blank or NULL column  
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