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  Astrometry around RX J0720.4-3125 (Kaplan+, 2007)
Post annotation
1.J/ApJ/660/1428/table7ePSF position measurements for all exposures (1172 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)
  ID (char) Object identifier (Note G1)   (;meta.main)
  Exp (char) Exposure identifier (hrcNN) (;obs.exposure)
  DXpix pix Distortion-corrected X position (pos.cartesian.x;instr.det)
  e_DXpix pix Uncertainty in Xpix (stat.error)
  DYpix pix Distortion-corrected Y position (pos.cartesian.y;instr.det)
  e_DYpix pix Uncertainty in Ypix (stat.error)
  Num  Number of bad pixel and distance to nearest bad one (Note 1)   (meta.number)
  Rchi2  Reduced χ2 of the ePSF fit (
  Xpix pix Measured X position on chip (pos.cartesian.x;instr.det)
  e_Xpix pix Uncertainty in Xpix (stat.error;pos.cartesian.x)
  Ypix pix Measured Y position on chip (pos.cartesian.y;instr.det)
  e_Ypix pix Uncertainty in Ypix (stat.error;pos.cartesian.y)
  Amp  Amplitude of effective PSF (ePSF) (src.var.amplitude)
  e_Amp  Uncertainty in Amp (stat.error)
  Sky  Sky level (instr.skyLevel)
  e_Sky  Uncertainty in Sky (0 = fixed sky value) (stat.error)

ALL cols
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