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V/139/sdss9 The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
Data Release 9 (469,053,874 primary sources plus 324,960,076 secondary sources); 2,674,200 spectroscopic targets. Data Release 9 is the first release of the spectra from the SDSS-III's Baryon Oscillation Spectroscopic Survey (BOSS). The photometric part contains the same sources as the Data Release 8, with a corrected astrometry. (324960076 rows)
  objID=1237679563907661903
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Note: SDSS is also available from http://www.sdss3.org/dr9/

ColumnValue  Explain   (UCD)
_RAJ200000 48 12.82248 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+27 39 25.9956 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195000 45 31.98626 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+27 23 04.9759 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon122.05809713 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-35.20905729 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)

mode2   [1,2] 1: primary (469,053,874 sources), 2: secondary (324,960,076 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 object (3=galaxy, 6=star) (Note 1)   (src.class)

SDSS9J004812.82+273925.9  (i) SDSS-DR9 name, based on J2000 position (meta.id)
m_SDSS9    [*] The asterisk indicates that 2 different SDSS objects share the same SDSS9 name (meta.code.multip)
ImIm  Image from SDSS-server (meta.ref.url)

SDSS-ID7937-301-4-0122-0079   [0-9 -] SDSS object identifier (Note 2)   (meta.id)
objID1237679563907661903  (i) SDSS unique object identifier (2) (links to SDSS-DR9 details) (Note)   (meta.id;meta.main)
Sp-ID   Spectroscopic Plate-MJD-Fiber identifier (Note 7)   (meta.id)
SpObjID 0  Pointer to the spectrum of object, or 0 (7) (Note)   (meta.id)
parentID1237679563907661894  Pointer to parent (if object deblended) (meta.id.parent)
flags 201810161058  Photo Object Attribute flags (Note 3)   (meta.code.error)
Status00000401   [0-9A-F] Hexadecimal status (Note 4)   (meta.code)
RA_ICRS012.053427 deg (i) Right Ascension of the object (ICRS) (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.097 arcsec Mean error on RAdeg (raErr) (stat.error;pos.eq.ra)
DE_ICRS+27.657221 deg (i) Declination of the object (ICRS) (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.081 arcsec Mean error on DEdeg (decErr) (stat.error;pos.eq.dec)
ObsDate2009.0791 yr Mean Observation date (time.epoch;obs;stat.mean)
Q3   [0/5] Quality of the observation (0=unknown): 1=bad 2=acceptable 3=good 4=missing 5=hole (Note 6)   (meta.code.qual;obs.param;obs)
umag16.863 mag (i) Model magnitude in u filter, AB scale (u) (Note 5)   (phot.mag;em.opt.U)
e_umag 0.024 mag Mean error on umag (err_u) (stat.error;phot.mag;em.opt.U)
gmag15.212 mag (i) Model magnitude in g filter, AB scale (g) (Note 5)   (phot.mag;em.opt.B)
e_gmag 0.003 mag Mean error on gmag (err_g) (stat.error;phot.mag;em.opt.B)
rmag14.341 mag (i) Model magnitude in r filter, AB scale (r) (Note 5)   (phot.mag;em.opt.R)
e_rmag 0.002 mag Mean error on rmag (err_r) (stat.error;phot.mag;em.opt.R)
imag13.926 mag (i) Model magnitude in i filter, AB scale (i) (Note 5)   (phot.mag;em.opt.I)
e_imag 0.002 mag Mean error on imag (err_i) (stat.error;phot.mag;em.opt.I)
zmag13.620 mag (i) Model magnitude in z filter, AB scale (z) (Note 5)   (phot.mag;em.opt.I)
e_zmag 0.005 mag Mean error on zmag (err_z) (stat.error;phot.mag;em.opt.I)
zsp    Spectroscopic redshift (when SpObjID>0) (Note 7)   (src.redshift)
e_zsp    Mean error on zsp (negative for bad fit) (Note 7)   (stat.error)
f_zsp    [0/255] "zwarning" flag (Note 9)   (meta.code)
Vdisp  km/s Velocity dispersion (velDisp) (phys.veloc.dispersion)
e_Vdisp  km/s Mean error on Vdisp (velDispErr) (stat.error)
spInst    [SDSS BOSS] Spectral instrument (instrument) (meta.id;instr)
spType   Source type (sourceType) (10) (list of types) (Note)   (src.class)
spCl   Spectroscopic class (class): GALAXY, QSO, STAR (meta.code.class;pos.parallax.spect)
subClass   Spectroscopic subclass (subClass) (Note 11)   (src.spType)
spS/N    Median signal-to-noise over all good pixels (snMedian) (em.wl.central;stat.median)
uFlags 4010029018  Detection flags, u band (flags_u) (Note 3)   (meta.code)
us0   [0,1] 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)
uDate2009.0791 yr Date of observation in u band (Note 6)   (time.epoch)
u'mag16.863 mag Model magnitude in u filter (= umag) (Note 5)   (phot.mag;em.opt.U)
e_u'mag 0.024 mag Mean error on u'mag (= e_umag) (stat.error;phot.mag)
upmag19.166 mag PSF magnitude in u band (psfMag_u) (phot.mag;em.opt.U)
e_upmag 0.046 mag Mean error on upmag (psfMagErr_u) (stat.error;phot.mag)
uPmag17.262 mag Petrosian magnitude in u band (petroMag_u) (phot.mag;em.opt.U)
e_uPmag 0.079 mag Mean error on uPmag (petroMagErr_u) (stat.error;phot.mag)
uPrad 12.93 arcsec Petrosian radius in u band (petroRad_u) (phys.angSize;src)
e_uPrad 0.90 arcsec Mean error in uPrad (petroRadErr_u) (stat.error)
uoRA 0.00 arcsec Offset of u position along RA (offsetRa_u) (pos.angDistance)
uoDE 0.00 arcsec Offset of u position along Dec (offsetDec_u) (pos.angDistance)
udVrad 10.58 arcsec de Vaucouleurs fit radius, u band (deVRad_u) (phys.angSize;src)
udVell 0.803 arcsec de Vaucouleurs fit ellipt, u band (1-deVAB_u) (src.ellipticity)
uPA 87.2 deg Position angle of dVrad in u band (deVPhi_u) (pos.posAng)
gFlags 4010169018  Detection flags, g band (flags_g) (Note 3)   (meta.code)
gs0   [0,1] 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)
gDate2009.0792 yr Date of observation in g band (Note 6)   (time.epoch)
g'mag15.212 mag Model magnitude in g filter (= gmag) (Note 5)   (phot.mag;em.opt.B)
e_g'mag 0.003 mag Mean error on g'mag (= e_gmag) (stat.error;phot.mag;em.opt.B)
gpmag17.715 mag PSF magnitude in g band (psfMag_g) (phot.mag;em.opt.B)
e_gpmag 0.127 mag Mean error on gpmag (psfMagErr_g) (stat.error;phot.mag)
gPmag15.525 mag Petrosian magnitude in g band (petroMag_g) (phot.mag;em.opt.B)
e_gPmag 0.296 mag Mean error on gPmag (petroMagErr_g) (stat.error;phot.mag)
gPrad 13.27 arcsec Petrosian radius in g band (petroMagErr_g) (phys.angSize;src)
e_gPrad 0.17 arcsec Mean error in gPrad (petroMagErr_g) (stat.error)
goRA -0.39 arcsec Offset of g position along RA (offsetRa_g) (pos.angDistance)
goDE -0.02 arcsec Offset of g position along Dec (offsetDec_g) (pos.angDistance)
gdVrad 9.90 arcsec de Vaucouleurs fit radius, g band (deVRad_g) (phys.angSize;src)
gdVell 0.795 arcsec de Vaucouleurs fit ellipt, g band (1-deVAB_g) (src.ellipticity)
gPA110.7 deg Position angle of dVrad in g band (deVPhi_g) (pos.posAng)
rFlags 10004010169018  Detection flags, r band (flags_r) (Note 3)   (meta.code)
rs0   [0,1] 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)
rDate2009.0791 yr Date of observation in r band (Note 6)   (time.epoch)
r'mag14.341 mag Model magnitude in r filter (= rmag) (Note 5)   (phot.mag;em.opt.R)
e_r'mag 0.002 mag Mean error on r'mag (= e_rmag) (stat.error;phot.mag;em.opt.R)
rpmag16.952 mag PSF magnitude in r band (psfMag_r) (phot.mag;em.opt.R)
e_rpmag 0.080 mag Mean error on rpmag (psfMagErr_r) (stat.error;phot.mag)
rPmag14.598 mag Petrosian magnitude in r band (petroMag_r) (phot.mag;em.opt.R)
e_rPmag 0.170 mag Mean error on rPmag (petroMagErr_r) (stat.error;phot.mag)
rPrad 14.12 arcsec Petrosian radius in r band (petroMagErr_r) (phys.angSize;src)
e_rPrad 0.16 arcsec Mean error in rPrad (petroMagErr_r) (stat.error)
roRA -0.45 arcsec Offset of r position along RA (offsetRa_r) (pos.angDistance)
roDE -0.06 arcsec Offset of r position along Dec (offsetDec_r) (pos.angDistance)
rdVrad 10.48 arcsec de Vaucouleurs fit radius, r band (deVRad_r) (phys.angSize;src)
rdVell 0.815 arcsec de Vaucouleurs fit ellipt, r band (1-deVAB_r) (src.ellipticity)
rPA106.2 deg Position angle of dVrad in r band (deVPhi_r) (pos.posAng)
iFlags 4011169018  Detection flags, i band (flags_i) (Note 3)   (meta.code)
is0   [0,1] 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)
iDate2009.0791 yr Date of observation in i band (Note 6)   (time.epoch)
i'mag13.926 mag Model magnitude in i filter (= imag) (Note 5)   (phot.mag;em.opt.I)
e_i'mag 0.002 mag Mean error on i'mag (= e_imag) (stat.error;phot.mag;em.opt.I)
ipmag16.521 mag PSF magnitude in i band (psfMag_i) (phot.mag;em.opt.I)
e_ipmag 0.052 mag Mean error on ipmag (psfMagErr_i) (stat.error;phot.mag)
iPmag14.155 mag Petrosian magnitude in i band (petroMag_i) (phot.mag;em.opt.I)
e_iPmag 0.105 mag Mean error on iPmag (petroMagErr_i) (stat.error;phot.mag)
iPrad 14.76 arcsec Petrosian radius in i band (petroMagErr_i) (phys.angSize;src)
e_iPrad 0.19 arcsec Mean error in iPrad (petroMagErr_i) (stat.error)
ioRA -0.45 arcsec Offset of i position along RA (offsetRa_i) (pos.angDistance)
ioDE -0.05 arcsec Offset of i position along Dec (offsetDec_i) (pos.angDistance)
idVrad 10.30 arcsec de Vaucouleurs fit radius, i band (deVRad_i) (phys.angSize;src)
idVell 0.818 arcsec de Vaucouleurs fit ellipt, i band (1-deVAB_i) (src.ellipticity)
iPA103.8 deg Position angle of dVrad in i band (deVPhi_i) (pos.posAng)
zFlags 4010069018  Detection flags, z band (flags_z) (Note 3)   (meta.code)
zs0   [0,1] 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)
zDate2009.0792 yr Date of observation in z band (Note 6)   (time.epoch)
z'mag13.620 mag Model magnitude in z filter (= zmag) (Note 5)   (phot.mag;em.opt.I)
e_z'mag 0.005 mag Mean error on z'mag (= e_zmag) (stat.error;phot.mag;em.opt.I)
zpmag16.216 mag PSF magnitude in z band (psfMag_z) (phot.mag;em.opt.I)
e_zpmag 0.385 mag Mean error on zpmag (psfMagErr_z) (stat.error;phot.mag)
zPmag13.918 mag Petrosian magnitude in z band (petroMag_z) (phot.mag;em.opt.I)
e_zPmag 0.841 mag Mean error on zPmag (petroMagErr_z) (stat.error;phot.mag)
zPrad 13.86 arcsec Petrosian radius in z band (petroMagErr_z) (phys.angSize;src)
e_zPrad 7.02 arcsec Mean error in zPrad (petroMagErr_z) (stat.error)
zoRA -0.46 arcsec Offset of z position along RA (offsetRa_z) (pos.angDistance)
zoDE -0.05 arcsec Offset of z position along Dec (offsetDec_z) (pos.angDistance)
zdVrad 10.19 arcsec de Vaucouleurs fit radius, z band (deVRad_z) (phys.angSize;src)
zdVell 0.787 arcsec de Vaucouleurs fit ellipt, z band (1-deVAB_z) (src.ellipticity)
zPA105.4 deg Position angle of dVrad in z band (deVPhi_z) (pos.posAng)
pmRA -2 mas/yr Proper motion along RightAscension (pmRa) (Note 8)   (pos.pm;pos.eq.ra)
e_pmRA 2 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 2 mas/yr Mean error on pmDE (pmDecErr) (Note 8)   (stat.error;pos.pm;pos.eq.dec)
sigRA 0.10 arcsec RMS residual of proper motion fit in RA (Note 8)   (stat.fit.residual)
sigDE 0.19 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)
N6  Number of detections used in the pm fit, including SDSS (nFit) (Note 8)   (meta.number)
g(O)11.9 mag Magnitude from O plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
r(E)10.9 mag Magnitude from E plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
g(J)11.3 mag Magnitude from J plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
r(F)10.4 mag Magnitude from F plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
i(N)10.4 mag Magnitude from N plate recalibrated to i (Note 8)   (phot.mag;em.opt.I)
  
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