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  MC massive stars IMF. I. (Hill+, 1994)
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1.J/ApJS/91/583/tablesUBV photometry (6729 rows)

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  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  Name (char) OB association name (bytes 1-7) and star identification number (bytes 10-13) (;meta.main)
  X  X coordinate of star on CCD image in fig. 1 (pos.cartesian.x;instr.det)
  Y  Y coordinate (pos.cartesian.y;instr.det)
  V mag V magnitude (phot.mag;em.opt.V)
  e_V mag rms uncertainty on V (stat.error)
  B-V mag B-V color (phot.color;em.opt.B;em.opt.V)
  e_B-V mag rms uncertainty on B-V (stat.error)
  U-B mag []? U-B color (phot.color;em.opt.U;em.opt.B)
  e_U-B mag []? rms uncertainty on U-B (stat.error)

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