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VizieR

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J/AJ/134/1890/table5 Secondary standard stars in u'g'r'i'z' (Clem+, 2007)
Secondary standards in star clusters NGC 2682, NGC 5272, NGC 6205, NGC 6341, NGC 6791, NGC 6838 (12225 rows)
  recno=4449
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ColumnValue  Explain   (UCD)
_RAJ200019 21 02.1600 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+37 45 39.600 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195019 19 16.8926 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+37 39 56.241 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon069.9621982 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+10.8720085 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
4449recno 4449  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ClusterNGC 6791  Globular cluster name (Note 1)   (meta.id.parent)
Star 1639  Sequential identification number, Cl* NGC NNNN CVS NNNNN in Simbad (meta.id;meta.main)
Xpos -434.4 pix X pixel coordinate (Note 2)   (pos.cartesian.x)
Ypos -153.5 pix Y pixel coordinate (Note 3)   (pos.cartesian.y)
u'mag  mag The u' band magnitude (Note 4)   (phot.mag;em.opt.U)
e_u'mag  mag Uncertainty in u'mag (Note 4)   (stat.error;phot.mag)
o_u'mag0  Number of measurements in u'mag (meta.number)
g'mag18.886 mag The g' band magnitude (Note 4)   (phot.mag;em.opt.B)
e_g'mag 0.0104 mag Uncertainty in g'mag (Note 4)   (stat.error;phot.mag;em.opt.B)
o_g'mag 6  Number of measurements in g'mag (meta.number)
r'mag18.006 mag The r' band magnitude (Note 4)   (phot.mag;em.opt.R)
e_r'mag 0.0126 mag Uncertainty in r'mag (Note 4)   (stat.error;phot.mag;em.opt.R)
o_r'mag 7  Number of measurements in r'mag (meta.number)
i'mag17.744 mag The i' band magnitude (Note 4)   (phot.mag;em.opt.I)
e_i'mag 0.0070 mag Uncertainty in i'mag (Note 4)   (stat.error;phot.mag;em.opt.I)
o_i'mag 5  Number of measurements in i'mag (meta.number)
z'mag17.628 mag The z' band magnitude (Note 4)   (phot.mag;em.opt.I)
e_z'mag 0.0373 mag Uncertainty in z'mag (Note 4)   (stat.error;phot.mag;em.opt.I)
o_z'mag2  Number of measurements in z'mag (meta.number)
chi 0.539  Mean value of χ image-quality index (Note 5)   (stat.fit.goodness)
sharp 0.170  Mean value of sharp image-quality index (Note 5)   (src.class.starGalaxy)
RAJ200019 21 02.16 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+37 45 39.6 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
  
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