VizieR

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VizieR

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J/AJ/134/973/stdcat SDSS Stripe 82 star catalogs (Ivezic+, 2007)
*SDSS Stripe 82 Standard Star Catalog (v2.6) (1006849 rows)
  recno=733366
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ColumnValue  Explain   (UCD)
_RAJ200000 43 28.21200 "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)
_DEJ2000-00 46 13.5770 "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)
_RAB195000 40 54.63803 "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)
_DEB1950-01 02 38.7164 "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)
_Glon118.45300979 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-63.57287481 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)
733366recno 733366  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000010.867550 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
e_RAJ2000 0.044 arcsec [0/0.5] Right ascension rms (Note 1)   (stat.error;pos.eq.ra)
DEJ2000-00.770438 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
e_DEJ2000 0.034 arcsec [0/0.8] Declination rms (Note 1)   (stat.error;pos.eq.dec)
Nep 8   [4/29] Total number of epochs (meta.number)
Ar 0.055 mag [0.03/1.7] ISM extinction value in the r band (Note 2)   (phys.absorption)
Nu 8   [0/28] Total number of observations in u band (meta.number)
umed21.089 mag [-0.4/27.6] Median u magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
umag21.054 mag [-0.4/27.9] Mean u-band magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
e_umag 0.036 mag [0/0.3] Standard error on umag (3) (grey values have less than 5 observations, and should be dicarded) (Note)   (stat.error;phot.mag;em.opt.U)
s_umag 0.066 mag [0/4] u-band root-mean-square scatter (grey values have less than 5 observations, and should be dicarded) (stat.error;phot.mag;em.opt.U)
uchi2 0.5   [0/442] chi2 per degree of freedom (computed using the mean u-band magnitude) (stat.fit.chi2)
Ng 8   [4/28] Total number of observations in g band (meta.number)
gmed19.939 mag [13.76/23.78] Median g magnitude (phot.mag;em.opt.B)
gmag19.940 mag [13.76/23.73] Mean g-band magnitude (phot.mag;em.opt.B)
e_gmag 0.008 mag [0.002/0.2] Standard error on gmag (Note 3)   (stat.error;phot.mag;em.opt.B)
s_gmag 0.017 mag [0/0.5] g-band root-mean-square scatter (stat.error;phot.mag)
gchi2 0.5   [0/3] chi2 per degree of freedom (computed using the mean g-band magnitude) (stat.fit.chi2)
Nr 8   [4/28] Total number of observations in r band (meta.number)
rmed19.526 mag [13.4/21.9] Median r magnitude (phot.mag;em.opt.R)
rmag19.530 mag [13.4/21.87] Mean r-band magnitude (phot.mag;em.opt.R)
e_rmag 0.007 mag [0.002/0.05] Standard error on rmag (Note 3)   (stat.error;phot.mag;em.opt.R)
s_rmag 0.020 mag [0/0.4] r-band root-mean-square scatter (stat.error;phot.mag)
rchi2 0.8   [0/3] chi2 per degree of freedom (computed using the mean r-band magnitude) (stat.fit.chi2)
Ni 8   [4/28] Total number of observations in i band (meta.number)
imed19.393 mag [13.27/22.18] Median i magnitude (phot.mag;em.opt.I)
imag19.386 mag [13.27/22.15] Mean i-band magnitude (phot.mag;em.opt.I)
e_imag 0.008 mag [0.002/0.2] Standard error on imag (Note 3)   (stat.error;phot.mag;em.opt.I)
s_imag 0.033 mag [0.001/0.5] i-band root-mean-square scatter (stat.error;phot.mag)
ichi2 1.9   [0/3] chi2 per degree of freedom (computed using the mean i-band magnitude) (stat.fit.chi2)
Nz 8   [0/28] Total number of observations in z band (meta.number)
zmed19.326 mag [-0.03/21.8] Median z magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
zmag19.336 mag [-0.03/21.9] Mean z-band magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
e_zmag 0.020 mag [0/0.3] Standard error on zmag (3) (grey values have less than 5 observations, and should be dicarded) (Note)   (stat.error;phot.mag;em.opt.I)
s_zmag 0.042 mag [0/1.2] z-band root-mean-square scatter (grey values have less than 5 observations, and should be dicarded) (stat.error;phot.mag)
zchi2 0.5   [0/2088] chi2 per degree of freedom (computed using the mean z-band magnitude) (stat.fit.chi2)

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