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VizieR

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II/294/sdss7 The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
Data Release 7 (357,175,411 primary sources, plus 65,714,108 secondary sources) (65714108 rows)
  SDSS===J025157.23+315948.1
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Note: SDSS is also available from http://www.sdss.org/

ColumnValue  Explain   (UCD)
_RAJ200002 51 57.23791 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+31 59 48.0953 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195002 48 55.37388 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+31 47 30.4344 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon150.77159233 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-24.27992032 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)

mode1   [1,2] 1: primary (357,175,411 sources), 2: secondary (65,058,969 sources). (meta.code.class)
q_mode    [+] '+' indicates clean photometry (105,969,748 sources with mode 1+) (meta.code.qual;instr.setup)
cl3  Type (class) of the object (type) (Note 1)   (src.class)
SDSSJ025157.23+315948.1  (i) Recommended SDSS name, based on J2000 position (meta.id)
m_SDSS    [*] The asterisk indicates that 2 different SDSS objects share the same SDSS name (meta.code.multip)
R7   [3457] Release inclusion (blank for new, 3,4,5 when already included in DR3/4/5) (meta.note)
SDSS-ID5817.2.174.0773   [ 0-9.] SDSS object identifier (Note 2)   (meta.id)
objID758881522121835269  SDSS unique object identifier (2) (links to SDSS details) (Note)   (meta.id;meta.main)
SpObjID 0  Pointer to the spectrum of object, or 0 (7) (Note)   (meta.id)
parentID 0  Pointer to parent (if object deblended) (meta.id.parent)
rerun648   [40,651] Re-run number (Note 2)   (meta.code)
flags 1010000100  Photo Object Attribute flags (Note 3)   (meta.code.error)
Status00002673   [0-9A-F] Hexadecimal status (Note 4)   (meta.code)
e_RA_ICRS 0.119 arcsec Mean error on RAdeg (raErr) (stat.error;pos.eq.ra)
e_DE_ICRS 0.122 arcsec Mean error on DEdeg (decErr) (stat.error;pos.eq.dec)
ccPos 0.04  Correlation between eRAdeg/eDEdeg (raDecCorr) (stat.correlation)
zsp    Spectroscopic redshift (when SpObjID>0) (Note 7)   (src.redshift)
e_zsp    Mean error on zsp (Note 7)   (stat.error)
umag21.796 mag (i) Model magnitude in u filter (u) (Note 5)   (phot.mag;em.opt.U)
e_umag 0.434 mag Mean error on umag (err_u) (stat.error;phot.mag;em.opt.U)
gmag20.706 mag (i) Model magnitude in g filter (g) (Note 5)   (phot.mag;em.opt.B)
e_gmag 0.054 mag Mean error on gmag (err_g) (stat.error;phot.mag;em.opt.B)
rmag19.996 mag (i) Model magnitude in r filter (r) (Note 5)   (phot.mag;em.opt.R)
e_rmag 0.048 mag Mean error on rmag (err_r) (stat.error;phot.mag;em.opt.R)
imag19.548 mag (i) Model magnitude in i filter (i) (Note 5)   (phot.mag;em.opt.I)
e_imag 0.052 mag Mean error on imag (err_i) (stat.error;phot.mag;em.opt.I)
zmag19.079 mag (i) Model magnitude in z filter (z) (Note 5)   (phot.mag;em.opt.I)
e_zmag 0.107 mag Mean error on zmag (err_z) (stat.error;phot.mag;em.opt.I)
uFlags 20000008008001  Detection flags, u band (flags_u) (Note 3)   (meta.code)
us0   [0,2] 0=notStar, 1=Star in u band (probPSF_u) (src.class.starGalaxy)
uc3   [0,9] Phototype in u band, 6=Star (type_u) (Note 1)   (src.class.starGalaxy)
uDate2005.8437 yr Date of observation in u band (Note 6)   (time.epoch)
u'mag21.796 mag Model magnitude in u filter (= umag) (Note 5)   (phot.mag;em.opt.U)
e_u'mag 0.434 mag Mean error on u'mag (= e_umag) (stat.error;phot.mag)
upmag22.650 mag PSF magnitude in u band (psfMag_u) (phot.mag;em.opt.U)
e_upmag 0.406 mag Mean error on upmag (psfMagErr_u) (stat.error;phot.mag)
uPmag22.477 mag Petrosian magnitude in u band (petroMag_u) (phot.mag;em.opt.U)
e_uPmag 1.836 mag Mean error on uPmag (petroMagErr_u) (stat.error;phot.mag)
uPrad 1.72 arcsec Petrosian radius in u band (petroRad_u) (phys.angSize;src)
e_uPrad 1.58 arcsec Mean error in uPrad (petroRadErr_u) (stat.error)
uoRA -0.02 arcsec Offset of u position along RA (offsetRa_u) (pos.angDistance)
uoDE -0.04 arcsec Offset of u position along Dec (offsetDec_u) (pos.angDistance)
uisoA  arcsec Isophotal major diameter in u band (isoA_u) (phys.angSize;em.opt.U)
uisoB  arcsec Isophotal minor diameter in u band (isoB_u) (phys.angSize;em.opt.U)
uPA  deg Position angle of uisoA in u band (isoPhi_u) (pos.posAng)
gFlags 4010008000  Detection flags, g band (flags_g) (Note 3)   (meta.code)
gs0   [0,2] 0=notStar, 1=Star in g band (probPSF_g) (src.class.starGalaxy)
gc3   [0,9] Phototype in g band, 6=Star (type_g) (Note 1)   (src.class.starGalaxy)
gDate2005.8437 yr Date of observation in g band (Note 6)   (time.epoch)
g'mag20.706 mag Model magnitude in g filter (= gmag) (Note 5)   (phot.mag;em.opt.B)
e_g'mag 0.054 mag Mean error on g'mag (= e_gmag) (stat.error;phot.mag;em.opt.B)
gpmag22.042 mag PSF magnitude in g band (psfMag_g) (phot.mag;em.opt.B)
e_gpmag 0.073 mag Mean error on gpmag (psfMagErr_g) (stat.error;phot.mag)
gPmag21.084 mag Petrosian magnitude in g band (petroMag_g) (phot.mag;em.opt.B)
e_gPmag 0.167 mag Mean error on gPmag (petroMagErr_g) (stat.error;phot.mag)
gPrad 3.85 arcsec Petrosian radius in g band (petroMagErr_g) (phys.angSize;src)
e_gPrad 0.36 arcsec Mean error in gPrad (petroMagErr_g) (stat.error)
goRA 0.03 arcsec Offset of g position along RA (offsetRa_g) (pos.angDistance)
goDE -0.11 arcsec Offset of g position along Dec (offsetDec_g) (pos.angDistance)
gisoA 12.01 arcsec Isophotal major diameter in g band (isoA_g) (phys.angSize)
gisoB 2.92 arcsec Isophotal minor diameter in g band (isoB_g) (phys.angSize)
gPA171.5 deg Position angle of gisoA in g band (isoPhi_g) (pos.posAng)
rFlags 10004010008500  Detection flags, r band (flags_r) (Note 3)   (meta.code)
rs0   [0,2] 0=notStar, 1=Star in r band (probPSF_r) (src.class.starGalaxy)
rc3   [0,9] Phototype in r band, 6=Star (type_r) (Note 1)   (src.class.starGalaxy)
rDate2005.8437 yr Date of observation in r band (Note 6)   (time.epoch)
r'mag19.996 mag Model magnitude in r filter (= rmag) (Note 5)   (phot.mag;em.opt.R)
e_r'mag 0.048 mag Mean error on r'mag (= e_rmag) (stat.error;phot.mag;em.opt.R)
rpmag21.384 mag PSF magnitude in r band (psfMag_r) (phot.mag;em.opt.R)
e_rpmag 0.069 mag Mean error on rpmag (psfMagErr_r) (stat.error;phot.mag)
rPmag20.110 mag Petrosian magnitude in r band (petroMag_r) (phot.mag;em.opt.R)
e_rPmag 0.076 mag Mean error on rPmag (petroMagErr_r) (stat.error;phot.mag)
rPrad 7.36 arcsec Petrosian radius in r band (petroMagErr_r) (phys.angSize;src)
e_rPrad  arcsec Mean error in rPrad (petroMagErr_r) (stat.error)
roRA 0.00 arcsec Offset of r position along RA (offsetRa_r) (pos.angDistance)
roDE 0.00 arcsec Offset of r position along Dec (offsetDec_r) (pos.angDistance)
risoA 12.12 arcsec Isophotal major diameter in r band (isoA_r) (phys.angSize)
risoB 4.38 arcsec Isophotal minor diameter in r band (isoB_r) (phys.angSize)
rPA170.5 deg Position angle of risoA in r band (isoPhi_r) (pos.posAng)
iFlags 4010008000  Detection flags, i band (flags_i) (Note 3)   (meta.code)
is0   [0,2] 0=notStar, 1=Star in i band (probPSF_i) (src.class.starGalaxy)
ic3   [0,9] Phototype in i band, 6=Star (type_i) (Note 1)   (src.class.starGalaxy)
iDate2005.8437 yr Date of observation in i band (Note 6)   (time.epoch)
i'mag19.548 mag Model magnitude in i filter (= imag) (Note 5)   (phot.mag;em.opt.I)
e_i'mag 0.052 mag Mean error on i'mag (= e_imag) (stat.error;phot.mag;em.opt.I)
ipmag21.093 mag PSF magnitude in i band (psfMag_i) (phot.mag;em.opt.I)
e_ipmag 0.073 mag Mean error on ipmag (psfMagErr_i) (stat.error;phot.mag)
iPmag20.065 mag Petrosian magnitude in i band (petroMag_i) (phot.mag;em.opt.I)
e_iPmag 0.182 mag Mean error on iPmag (petroMagErr_i) (stat.error;phot.mag)
iPrad 3.69 arcsec Petrosian radius in i band (petroMagErr_i) (phys.angSize;src)
e_iPrad 0.36 arcsec Mean error in iPrad (petroMagErr_i) (stat.error)
ioRA 0.09 arcsec Offset of i position along RA (offsetRa_i) (pos.angDistance)
ioDE -0.08 arcsec Offset of i position along Dec (offsetDec_i) (pos.angDistance)
iisoA 10.41 arcsec Isophotal major diameter in i band (isoA_i) (phys.angSize)
iisoB 5.91 arcsec Isophotal minor diameter in i band (isoB_i) (phys.angSize)
iPA 1.5 deg Position angle of iisoA in i band (isoPhi_i) (pos.posAng)
zFlags 4018008000  Detection flags, z band (flags_z) (Note 3)   (meta.code)
zs0   [0,2] 0=notStar, 1=Star in z band (probPSF_z) (src.class.starGalaxy)
zc3   [0,9] Phototype in z band, 6=Star (type_z) (Note 1)   (src.class.starGalaxy)
zDate2005.8437 yr Date of observation in z band (Note 6)   (time.epoch)
z'mag19.079 mag Model magnitude in z filter (= zmag) (Note 5)   (phot.mag;em.opt.I)
e_z'mag 0.107 mag Mean error on z'mag (= e_zmag) (stat.error;phot.mag;em.opt.I)
zpmag20.421 mag PSF magnitude in z band (psfMag_z) (phot.mag;em.opt.I)
e_zpmag 0.132 mag Mean error on zpmag (psfMagErr_z) (stat.error;phot.mag)
zPmag18.991 mag Petrosian magnitude in z band (petroMag_z) (phot.mag;em.opt.I)
e_zPmag 0.232 mag Mean error on zPmag (petroMagErr_z) (stat.error;phot.mag)
zPrad 5.41 arcsec Petrosian radius in z band (petroMagErr_z) (phys.angSize;src)
e_zPrad 1.56 arcsec Mean error in zPrad (petroMagErr_z) (stat.error)
zoRA 0.10 arcsec Offset of z position along RA (offsetRa_z) (pos.angDistance)
zoDE 0.04 arcsec Offset of z position along Dec (offsetDec_z) (pos.angDistance)
zisoA  arcsec Isophotal major diameter in z band (isoA_z) (phys.angSize)
zisoB  arcsec Isophotal minor diameter in z band (isoB_z) (phys.angSize)
zPA  deg Position angle of zisoA in z band (isoPhi_z) (pos.posAng)
pmRA -8 mas/yr Proper motion along RightAscension (pmRa) (Note 8)   (pos.pm;pos.eq.ra)
e_pmRA 12 mas/yr Mean error on pmRA (pmRaErr) (Note 8)   (stat.error;pos.pm;pos.eq.ra)
pmDE 3 mas/yr Proper motion along Declination (pmDec) (Note 8)   (pos.pm;pos.eq.dec)
e_pmDE 12 mas/yr Mean error on pmDE (pmDecErr) (Note 8)   (stat.error;pos.pm;pos.eq.dec)
sigRA 0.175 arcsec RMS residual of proper motion fit in RA (Note 8)   (stat.fit.residual)
sigDE 0.246 arcsec RMS residual of proper motion fit in Dec (Note 8)   (stat.fit.residual)
M1  Number of USNO-B objects matched within 1arcsec (match) (Note 8)   (meta.number)
N4  Number of detections used in the pm fit, including SDSS (nFit) (Note 8)   (meta.number)
g(O)  mag Magnitude from O plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
r(E)  mag Magnitude from E plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
g(J)20.9 mag Magnitude from J plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
r(F)19.9 mag Magnitude from F plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
i(N)19.2 mag Magnitude from N plate recalibrated to i (Note 8)   (phot.mag;em.opt.I)
RA_ICRS042.988476 deg (i) Right Ascension of the object (ICRS) (ra) (pos.eq.ra;meta.main)
DE_ICRS+31.996698 deg (i) Declination of the object (ICRS) (dec) (pos.eq.dec;meta.main)
ObsDate2005.8437 yr Mean Observation date (time.epoch;obs;stat.mean)
Q2  Quality of the observation: 1=bad 2=acceptable 3=good 4=missing 5=hole (Note 6)   (meta.code.qual;obs.param;obs)
  
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