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=918382
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ColumnValue  Explain   (UCD)
_RAJ200003 00 01.74867 "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 49 59.3480 "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)
_RAB195002 57 27.39189 "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+00 38 06.8975 "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)
_Glon176.06649215 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-48.31596746 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)
918382recno 918382  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000045.007286 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
e_RAJ2000 0.039 arcsec [0/0.5] Right ascension rms (Note 1)   (stat.error;pos.eq.ra)
DEJ2000+00.833152 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
e_DEJ2000 0.039 arcsec [0/0.8] Declination rms (Note 1)   (stat.error;pos.eq.dec)
Nep 19   [4/29] Total number of epochs (meta.number)
Ar 0.242 mag [0.03/1.7] ISM extinction value in the r band (Note 2)   (phys.absorption)
Nu 18   [0/28] Total number of observations in u band (meta.number)
umed17.677 mag [-0.4/27.6] Median u magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
umag17.678 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 0.005 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 0.018 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 0.6   [0/442] chi2 per degree of freedom (computed using the mean u-band magnitude) (stat.fit.chi2)
Ng 18   [4/28] Total number of observations in g band (meta.number)
gmed16.385 mag [13.76/23.78] Median g magnitude (phot.mag;em.opt.B)
gmag16.387 mag [13.76/23.73] Mean g-band magnitude (phot.mag;em.opt.B)
e_gmag 0.004 mag [0.002/0.2] Standard error on gmag (Note 3)   (stat.error;phot.mag;em.opt.B)
s_gmag 0.021 mag [0/0.5] g-band root-mean-square scatter (stat.error;phot.mag)
gchi2 1.0   [0/3] chi2 per degree of freedom (computed using the mean g-band magnitude) (stat.fit.chi2)
Nr 18   [4/28] Total number of observations in r band (meta.number)
rmed15.914 mag [13.4/21.9] Median r magnitude (phot.mag;em.opt.R)
rmag15.914 mag [13.4/21.87] Mean r-band magnitude (phot.mag;em.opt.R)
e_rmag 0.004 mag [0.002/0.05] Standard error on rmag (Note 3)   (stat.error;phot.mag;em.opt.R)
s_rmag 0.010 mag [0/0.4] r-band root-mean-square scatter (stat.error;phot.mag)
rchi2 0.4   [0/3] chi2 per degree of freedom (computed using the mean r-band magnitude) (stat.fit.chi2)
Ni 18   [4/28] Total number of observations in i band (meta.number)
imed15.752 mag [13.27/22.18] Median i magnitude (phot.mag;em.opt.I)
imag15.752 mag [13.27/22.15] Mean i-band magnitude (phot.mag;em.opt.I)
e_imag 0.004 mag [0.002/0.2] Standard error on imag (Note 3)   (stat.error;phot.mag;em.opt.I)
s_imag 0.013 mag [0.001/0.5] i-band root-mean-square scatter (stat.error;phot.mag)
ichi2 0.6   [0/3] chi2 per degree of freedom (computed using the mean i-band magnitude) (stat.fit.chi2)
Nz 18   [0/28] Total number of observations in z band (meta.number)
zmed15.674 mag [-0.03/21.8] Median z magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
zmag15.674 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 0.004 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 0.016 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 0.8   [0/2088] chi2 per degree of freedom (computed using the mean z-band magnitude) (stat.fit.chi2)

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