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=866289
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ColumnValue  Explain   (UCD)
_RAJ200002 27 39.33747 "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)
_DEJ2000-01 11 39.3790 "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 25 06.48782 "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 25 03.9164 "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)
_Glon168.62704595 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-55.28828554 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)
866289recno 866289  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000036.913906 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
e_RAJ2000 0.040 arcsec [0/0.5] Right ascension rms (Note 1)   (stat.error;pos.eq.ra)
DEJ2000-01.194272 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
e_DEJ2000 0.042 arcsec [0/0.8] Declination rms (Note 1)   (stat.error;pos.eq.dec)
Nep 11   [4/29] Total number of epochs (meta.number)
Ar 0.096 mag [0.03/1.7] ISM extinction value in the r band (Note 2)   (phys.absorption)
Nu 11   [0/28] Total number of observations in u band (meta.number)
umed21.206 mag [-0.4/27.6] Median u magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
umag21.240 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 0.030 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 0.207 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 3.0   [0/442] chi2 per degree of freedom (computed using the mean u-band magnitude) (stat.fit.chi2)
Ng 11   [4/28] Total number of observations in g band (meta.number)
gmed21.098 mag [13.76/23.78] Median g magnitude (phot.mag;em.opt.B)
gmag21.082 mag [13.76/23.73] Mean g-band magnitude (phot.mag;em.opt.B)
e_gmag 0.014 mag [0.002/0.2] Standard error on gmag (Note 3)   (stat.error;phot.mag;em.opt.B)
s_gmag 0.058 mag [0/0.5] g-band root-mean-square scatter (stat.error;phot.mag)
gchi2 1.6   [0/3] chi2 per degree of freedom (computed using the mean g-band magnitude) (stat.fit.chi2)
Nr 11   [4/28] Total number of observations in r band (meta.number)
rmed21.002 mag [13.4/21.9] Median r magnitude (phot.mag;em.opt.R)
rmag21.007 mag [13.4/21.87] Mean r-band magnitude (phot.mag;em.opt.R)
e_rmag 0.015 mag [0.002/0.05] Standard error on rmag (Note 3)   (stat.error;phot.mag;em.opt.R)
s_rmag 0.064 mag [0/0.4] r-band root-mean-square scatter (stat.error;phot.mag)
rchi2 1.5   [0/3] chi2 per degree of freedom (computed using the mean r-band magnitude) (stat.fit.chi2)
Ni 11   [4/28] Total number of observations in i band (meta.number)
imed20.919 mag [13.27/22.18] Median i magnitude (phot.mag;em.opt.I)
imag20.907 mag [13.27/22.15] Mean i-band magnitude (phot.mag;em.opt.I)
e_imag 0.020 mag [0.002/0.2] Standard error on imag (Note 3)   (stat.error;phot.mag;em.opt.I)
s_imag 0.074 mag [0.001/0.5] i-band root-mean-square scatter (stat.error;phot.mag)
ichi2 1.3   [0/3] chi2 per degree of freedom (computed using the mean i-band magnitude) (stat.fit.chi2)
Nz 11   [0/28] Total number of observations in z band (meta.number)
zmed20.689 mag [-0.03/21.8] Median z magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
zmag20.656 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 0.052 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 0.143 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 0.6   [0/2088] chi2 per degree of freedom (computed using the mean z-band magnitude) (stat.fit.chi2)

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