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J/A+A/402/1157
  Photometric standards around gravitational lenses (Nakos+ 2003)
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2003A&A...402.1157N
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1.J/A+A/402/1157/table1General information regarding the observations on which the selection (Wise Observatory) and the calibration (Skinakas and SAAO Observatories) of the secondary photometric standard stars was based (14 rows)
2.J/A+A/402/1157/table2(c)Photometry and astrometry for the new set of secondary photometric standard stars in the fields of 14 gravitational lenses (42 rows)
3.J/A+A/402/1157/table3Photometry for ten gravitational lenses (integrated flux measured by aperture photometry) (10 rows)

Simple ConstraintList Of Constraints
 
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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)
  (1)Seq  Sequential number of the gravitational lens (meta.id)
   (ALL)Lens (char) (i) Gravitational lens name (obs.field)
  (1)StDate "Y:M:D" (n)Starting date of the observations at Wise Observatory (time.epoch)
  (1)EnDate "Y:M:D" (n)Ending date of the observations at Wise Observatory (time.epoch)
  (1)NDet  (n) Total number of frame used for the detection of the non-variable stars (meta.number)
  (1)NCal  Number of nights at SAAO and Skinakas used for the calibration to the Johnson-Counsins photometric system (meta.number)
  (1)o_Bmag  (n) Total number of exposures in B filter (meta.number)
  (1)o_Vmag  (n) Total number of exposures in V filter (meta.number)
  (1)o_Rcmag  (n) Total number of exposures in Rc filter (meta.number)
  (1)o_Icmag  (n) Total number of exposures in Ic filter (meta.number)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)Date1 "Y:M:D" (n)Date in which the photometric calibration has been carried out (Note 1)   (time.epoch)
  (1)Date2 "Y:M:D" (n)Date in which the photometric calibration has been carried out (Note 1)   (time.epoch)
  (1)Date3 "Y:M:D" (n)Date in which the photometric calibration has been carried out (Note 1)   (time.epoch)
  (1)Date4 "Y:M:D" (n)Date in which the photometric calibration has been carried out (Note 1)   (time.epoch)
  (2)NLens  Number of star in the field (obs.field)
  (2)RAJ2000 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
  (2)DEJ2000 "d:m:s" (i) Declination J2000 (degrees) (pos.eq.dec;meta.main)
  (2+3)Vmag mag V magnitude (phot.mag;em.opt.V)
  (2+3)e_Vmag mag Mean error on Vmag (stat.error)
  (2+3)B-V mag (n) B-V Johnson-Cousins color index (phot.color;em.opt.B;em.opt.V)
  (2+3)e_B-V mag (n) Mean error on B-V (stat.error)
  (2+3)V-Rc mag V-Rc Johnson-Cousins color index (phot.color;em.opt.V;em.opt.R)
  (2+3)e_V-Rc mag Mean error on V-Rc (stat.error)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2+3)V-Ic mag V-Ic Johnson-Cousins color index (phot.color;em.opt.V;em.opt.I)
  (2+3)e_V-Ic mag Mean error on V-Ic (stat.error)
  (2)OName (char) Other name of the gravitational lens (meta.id)

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