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II/306
 The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011)
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This catalogue is obsoleted by V/139
Post annotation 		img(gal)
1.II/306/sdss8Data Release 8 (469,053,874 primary sources, plus 324,960,076 secondary sources). Notice that the new reductions used for the SDSS-DR8 introduced some errors in the astrometry, especially at declinations δ≥41°; when possible, the astrometry of the SDSS-DR7 (Cat. II/294) should be preferred. (Note) (324960076 rows)
SDSS is also available from http://www.sdss.org/

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  mode   [1,2] 1: primary (469,053,874 sources), 2: secondary (324,960,076 sources). (qualified to =1 by default) (meta.code.class)
  q_mode (char) [+] '+' indicates clean photometry (105,969,748 sources with mode 1+) (meta.code.qual;instr.setup)
  cl  Type (class) of object (3=galaxy, 6=star) (Note 1)   (src.class)
  SDSS8 (char) SDSS-DR8 name, based on J2000 position (meta.id)
  Im  Image from SDSS-serveur (meta.ref.url)
  m_SDSS8 (char) [*] The asterisk indicates that 2 different SDSS objects share the same SDSS8 name (meta.code.multip)
  R (char) [8] Release inclusion (all observations were reprocessed, value is always 8) (meta.note)
  SDSS-ID (char) [0-9-] SDSS object identifier (Note 2)   (meta.id)
  objID  SDSS unique object identifier (links to SDSS-DR8 details) (Note 2)   (meta.id;meta.main)
  SpObjID  Pointer to the spectrum of object, or 0 (Note 7)   (meta.id)
  parentID  Pointer to parent (if object deblended) (meta.id.parent)

ALL cols		    
   
  flags (char) Photo Object Attribute flags (Note 3)   (meta.code.error)
  Status (char) Hexadecimal status (Note 4)   (meta.code)
  RAJ2000 deg Right Ascension of the object (ICRS) (ra) (pos.eq.ra;meta.main)
  e_RAJ2000 arcsec Mean error on RAdeg (raErr) (stat.error;pos.eq.ra)
  DEJ2000 deg Declination of the object (ICRS) (dec) (pos.eq.dec;meta.main)
  e_DEJ2000 arcsec Mean error on DEdeg (decErr) (stat.error;pos.eq.dec)
  zsp  (n) Spectroscopic redshift (when SpObjID>0) (Note 7)   (src.redshift)
  e_zsp  (n) Mean error on zsp (Note 7)   (stat.error)
  umag mag (n) Model magnitude in u filter, AB scale (u) (Note 5)   (phot.mag;em.opt.U)
  e_umag mag (n) Mean error on umag (err_u) (stat.error;phot.mag;em.opt.U)
  gmag mag (n) Model magnitude in g filter, AB scale (g) (Note 5)   (phot.mag;em.opt.B)
  e_gmag mag (n) Mean error on gmag (err_g) (stat.error;phot.mag;em.opt.B)
  rmag mag (n) Model magnitude in r filter, AB scale (r) (Note 5)   (phot.mag;em.opt.R)

ALL cols		    
(n) indicates a possible blank or NULL column  
  e_rmag mag (n) Mean error on rmag (err_r) (stat.error;phot.mag;em.opt.R)
  imag mag (n) Model magnitude in i filter, AB scale (i) (Note 5)   (phot.mag;em.opt.I)
  e_imag mag (n) Mean error on imag (err_i) (stat.error;phot.mag;em.opt.I)
  zmag mag (n) Model magnitude in z filter, AB scale (z) (Note 5)   (phot.mag;em.opt.I)
  e_zmag mag (n) Mean error on zmag (err_z) (stat.error;phot.mag;em.opt.I)
  Q  Quality of the observation (0=unknown): 1=bad 2=acceptable 3=good 4=missing 5=hole (Note 6)   (meta.code.qual;obs.param;obs)
  ObsDate yr Mean Observation date (time.epoch;obs;stat.mean)
  uFlags (char) Detection flags, u band (flags_u) (Note 3)   (meta.code)
  us   [0,1] 0=notStar, 1=Star in u band (probPSF_u) (src.class.starGalaxy)
  uc   [0,9] Phototype in u band, 6=Star (type_u) (Note 1)   (src.class.starGalaxy)
  uDate yr Date of observation in u band (Note 6)   (time.epoch)
  u'mag mag (n) Model magnitude in u filter (= umag) (Note 5)   (phot.mag;em.opt.U)
  e_u'mag mag (n) Mean error on u'mag (= e_umag) (stat.error;phot.mag)

ALL cols		    
(n) indicates a possible blank or NULL column  
  upmag mag (n) PSF magnitude in u band (psfMag_u) (phot.mag;em.opt.U)
  e_upmag mag (n) Mean error on upmag (psfMagErr_u) (stat.error;phot.mag)
  uPmag mag (n) Petrosian magnitude in u band (petroMag_u) (phot.mag;em.opt.U)
  e_uPmag mag (n) Mean error on uPmag (petroMagErr_u) (stat.error;phot.mag)
  uPrad arcsec (n) Petrosian radius in u band (petroRad_u) (phys.angSize;src)
  e_uPrad arcsec (n) Mean error in uPrad (petroRadErr_u) (stat.error)
  uoRA arcsec (n) Offset of u position along RA (offsetRa_u) (pos.angDistance)
  uoDE arcsec (n) Offset of u position along Dec (offsetDec_u) (pos.angDistance)
  udVrad arcsec (n) de Vaucouleurs fit radius, u band (deVRad_u) (phys.angSize;src)
  udVell arcsec (n) de Vaucouleurs fit ellipt, u band (1-deVAB_u) (src.ellipticity)
  uPA deg (n) Position angle of dVrad in u band (deVPhi_u) (pos.posAng)
  gFlags (char) Detection flags, g band (flags_g) (Note 3)   (meta.code)
  gs   [0,1] 0=notStar, 1=Star in g band (probPSF_g) (src.class.starGalaxy)

ALL cols		    
(n) indicates a possible blank or NULL column  
  gc   [0,9] Phototype in g band, 6=Star (type_g) (Note 1)   (src.class.starGalaxy)
  gDate yr Date of observation in g band (Note 6)   (time.epoch)
  g'mag mag (n) Model magnitude in g filter (= gmag) (Note 5)   (phot.mag;em.opt.B)
  e_g'mag mag (n) Mean error on g'mag (= e_gmag) (stat.error;phot.mag;em.opt.B)
  gpmag mag (n) PSF magnitude in g band (psfMag_g) (phot.mag;em.opt.B)
  e_gpmag mag (n) Mean error on gpmag (psfMagErr_g) (stat.error;phot.mag)
  gPmag mag (n) Petrosian magnitude in g band (petroMag_g) (phot.mag;em.opt.B)
  e_gPmag mag (n) Mean error on gPmag (petroMagErr_g) (stat.error;phot.mag)
  gPrad arcsec (n) Petrosian radius in g band (petroMagErr_g) (phys.angSize;src)
  e_gPrad arcsec (n) Mean error in gPrad (petroMagErr_g) (stat.error)
  goRA arcsec (n) Offset of g position along RA (offsetRa_g) (pos.angDistance)
  goDE arcsec (n) Offset of g position along Dec (offsetDec_g) (pos.angDistance)
  gdVrad arcsec (n) de Vaucouleurs fit radius, g band (deVRad_g) (phys.angSize;src)

ALL cols		    
(n) indicates a possible blank or NULL column  
  gdVell arcsec (n) de Vaucouleurs fit ellipt, g band (1-deVAB_g) (src.ellipticity)
  gPA deg (n) Position angle of dVrad in g band (deVPhi_g) (pos.posAng)
  rFlags (char) Detection flags, r band (flags_r) (Note 3)   (meta.code)
  rs   [0,1] 0=notStar, 1=Star in r band (probPSF_r) (src.class.starGalaxy)
  rc   [0,9] Phototype in r band, 6=Star (type_r) (Note 1)   (src.class.starGalaxy)
  rDate yr Date of observation in r band (Note 6)   (time.epoch)
  r'mag mag (n) Model magnitude in r filter (= rmag) (Note 5)   (phot.mag;em.opt.R)
  e_r'mag mag (n) Mean error on r'mag (= e_rmag) (stat.error;phot.mag;em.opt.R)
  rpmag mag (n) PSF magnitude in r band (psfMag_r) (phot.mag;em.opt.R)
  e_rpmag mag (n) Mean error on rpmag (psfMagErr_r) (stat.error;phot.mag)
  rPmag mag (n) Petrosian magnitude in r band (petroMag_r) (phot.mag;em.opt.R)
  e_rPmag mag (n) Mean error on rPmag (petroMagErr_r) (stat.error;phot.mag)
  rPrad arcsec (n) Petrosian radius in r band (petroMagErr_r) (phys.angSize;src)

ALL cols		    
(n) indicates a possible blank or NULL column  
  e_rPrad arcsec (n) Mean error in rPrad (petroMagErr_r) (stat.error)
  roRA arcsec (n) Offset of r position along RA (offsetRa_r) (pos.angDistance)
  roDE arcsec (n) Offset of r position along Dec (offsetDec_r) (pos.angDistance)
  rdVrad arcsec (n) de Vaucouleurs fit radius, r band (deVRad_r) (phys.angSize;src)
  rdVell arcsec (n) de Vaucouleurs fit ellipt, r band (1-deVAB_r) (src.ellipticity)
  rPA deg (n) Position angle of dVrad in r band (deVPhi_r) (pos.posAng)
  iFlags (char) Detection flags, i band (flags_i) (Note 3)   (meta.code)
  is   [0,1] 0=notStar, 1=Star in i band (probPSF_i) (src.class.starGalaxy)
  ic   [0,9] Phototype in i band, 6=Star (type_i) (Note 1)   (src.class.starGalaxy)
  iDate yr Date of observation in i band (Note 6)   (time.epoch)
  i'mag mag (n) Model magnitude in i filter (= imag) (Note 5)   (phot.mag;em.opt.I)
  e_i'mag mag (n) Mean error on i'mag (= e_imag) (stat.error;phot.mag;em.opt.I)
  ipmag mag (n) PSF magnitude in i band (psfMag_i) (phot.mag;em.opt.I)

ALL cols		    
(n) indicates a possible blank or NULL column  
  e_ipmag mag (n) Mean error on ipmag (psfMagErr_i) (stat.error;phot.mag)
  iPmag mag (n) Petrosian magnitude in i band (petroMag_i) (phot.mag;em.opt.I)
  e_iPmag mag (n) Mean error on iPmag (petroMagErr_i) (stat.error;phot.mag)
  iPrad arcsec (n) Petrosian radius in i band (petroMagErr_i) (phys.angSize;src)
  e_iPrad arcsec (n) Mean error in iPrad (petroMagErr_i) (stat.error)
  ioRA arcsec (n) Offset of i position along RA (offsetRa_i) (pos.angDistance)
  ioDE arcsec (n) Offset of i position along Dec (offsetDec_i) (pos.angDistance)
  idVrad arcsec (n) de Vaucouleurs fit radius, i band (deVRad_i) (phys.angSize;src)
  idVell arcsec (n) de Vaucouleurs fit ellipt, i band (1-deVAB_i) (src.ellipticity)
  iPA deg (n) Position angle of dVrad in i band (deVPhi_i) (pos.posAng)
  zFlags (char) Detection flags, z band (flags_z) (Note 3)   (meta.code)
  zs   [0,1] 0=notStar, 1=Star in z band (probPSF_z) (src.class.starGalaxy)
  zc   [0,9] Phototype in z band, 6=Star (type_z) (Note 1)   (src.class.starGalaxy)

ALL cols		    
(n) indicates a possible blank or NULL column  
  zDate yr Date of observation in z band (Note 6)   (time.epoch)
  z'mag mag (n) Model magnitude in z filter (= zmag) (Note 5)   (phot.mag;em.opt.I)
  e_z'mag mag (n) Mean error on z'mag (= e_zmag) (stat.error;phot.mag;em.opt.I)
  zpmag mag (n) PSF magnitude in z band (psfMag_z) (phot.mag;em.opt.I)
  e_zpmag mag (n) Mean error on zpmag (psfMagErr_z) (stat.error;phot.mag)
  zPmag mag (n) Petrosian magnitude in z band (petroMag_z) (phot.mag;em.opt.I)
  e_zPmag mag (n) Mean error on zPmag (petroMagErr_z) (stat.error;phot.mag)
  zPrad arcsec (n) Petrosian radius in z band (petroMagErr_z) (phys.angSize;src)
  e_zPrad arcsec (n) Mean error in zPrad (petroMagErr_z) (stat.error)
  zoRA arcsec (n) Offset of z position along RA (offsetRa_z) (pos.angDistance)
  zoDE arcsec (n) Offset of z position along Dec (offsetDec_z) (pos.angDistance)
  zdVrad arcsec (n) de Vaucouleurs fit radius, z band (deVRad_z) (phys.angSize;src)
  zdVell arcsec (n) de Vaucouleurs fit ellipt, z band (1-deVAB_z) (src.ellipticity)

ALL cols		    
(n) indicates a possible blank or NULL column  
  zPA deg (n) Position angle of dVrad in z band (deVPhi_z) (pos.posAng)
  pmRA mas/yr (n) Proper motion along RightAscension (pmRa) (Note 8)   (pos.pm;pos.eq.ra)
  e_pmRA mas/yr (n) Mean error on pmRA (pmRaErr) (Note 8)   (stat.error;pos.pm;pos.eq.ra)
  pmDE mas/yr (n) Proper motion along Declination (pmDec) (Note 8)   (pos.pm;pos.eq.dec)
  e_pmDE mas/yr (n) Mean error on pmDE (pmDecErr) (Note 8)   (stat.error;pos.pm;pos.eq.dec)
  sigRA arcsec (n) RMS residual of proper motion fit in RA (Note 8)   (stat.fit.residual)
  sigDE arcsec (n) RMS residual of proper motion fit in Dec (Note 8)   (stat.fit.residual)
  M  Number of USNO-B objects matched within 1arcsec (match) (Note 8)   (meta.number)
  N  Number of detections used in the pm fit, including SDSS (nFit) (Note 8)   (meta.number)
  g(O) mag (n) Magnitude from O plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
  r(E) mag (n) Magnitude from E plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
  g(J) mag (n) Magnitude from J plate recalibrated to g (Note 8)   (phot.mag;em.opt.B)
  r(F) mag (n) Magnitude from F plate recalibrated to r (Note 8)   (phot.mag;em.opt.R)
  i(N) mag (n) Magnitude from N plate recalibrated to i (Note 8)   (phot.mag;em.opt.I)

ALL cols		    
(n) indicates a possible blank or NULL column  
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