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J/ApJ/659/1040
  VLBI monitoring of NGC 4258 (Argon+, 2007)
spectrum
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1.J/ApJ/659/1040/table1The observations (20 rows)
2.J/ApJ/659/1040/table5Channel data for 18 epochs of observation (14291 rows)

 
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)Obs (char) (i) Observation code (meta.code;obs)
  (1)Sp (char) Plot of line profile (meta.ref.url)
  (1)ExpCode (char) Experiment code (meta.code;obs)
  (1)ObsDate "Y:M:D" (n)Observation date (time.epoch;obs)
  (1)ObsYear yr (n) Observation date in decimal year (time.epoch;obs)
  (1)Ant (char) Antennas used for the observation (Note 1)   (meta.id;instr)
  (1)Beam1 mas (n) Size beam, average restoring beam full-width half-power (phys.angSize;instr.beam)
  (1)Beam2 mas (n) Size beam, average restoring beam full-width half-power (phys.angSize;instr.beam)
   (ALL)PA deg (n) [-32/39] Beam position angle, measured east of north (pos.posAng;instr.beam)
  (1)Sen mJy (n) Sensivity (Note 2)   (instr.sensitivity)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)CL (char) [x-] Coverage in velocity range L = low-velocity emission (meta.code)
  (1)CR (char) [x-] Coverage in velocity range R = redshift emission (meta.code)
  (1)CB (char) [x-] Coverage in velocity range B = blue-shifted emission (meta.code)
  (1)Com (char) Comments (meta.code)
  (2)Chan  Channel number (meta.id;instr)
  (2)cz km/s Nonrelativistic LSR velocity (Note 1)   (spect.dopplerVeloc;pos.lsr)
  (2)RelVel km/s Relativistic LSR velocity (Note 1)   (phys.veloc)
  (2)Flux Jy Flux density (Note 2)   (phot.flux.density;em.radio)
  (2)e_Flux mJy The rms error in Flux (stat.error;phot.flux)
  (2)EWoff mas East-West offset (Note 3)   (pos.angDistance;arith.diff)
  (2)e_EWoff mas Error (fitted random) in EWoff (stat.error)
  (2)NSoff mas North-South offset (Note 3)   (pos.angDistance;arith.diff)
  (2)e_NSoff mas Error (fitted random) in NSoff (stat.error)
  (2)Majaxis mas Major axis of spot (phys.angSize)
  (2)e_Majaxis mas Error in Majaxis (stat.error)
  (2)Minaxis mas Minor axis of spot (phys.angSize;src)
  (2)e_Minaxis mas Error in Minaxis (stat.error)
  (2)e_PA deg Error in PA (stat.error)
  (2)RefVel km/s Band identifier for reference velocity (Note 4)   (phys.veloc)

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