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J/ApJ/658/99
 Pairs of QSO in SDSS-DR4 (Myers+, 2007)
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Post annotation 		img(gal)
1.J/ApJ/658/99/table1Quasar pairs in the DR4 KDE catalog with separations <0.1' (111 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number within the original table (starting from 1) (meta.record)
  SDSS1 (char) First component of Quasar pair name, JHHMMSS.ss+DDMMSS.s (meta.id;meta.main)
  RAJ2000 "h:m:s" Pair1 Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" Pair1 Degree of Declination (J2000) (pos.eq.dec;meta.main)
  umag1  Pair1 SDSS u band magnitude (Note 1)   (phot.mag;em.opt.U)
  gmag1  Pair1 SDSS g band magnitude (Note 1)   (phot.mag;em.opt.B)
  zph1l  Pair1 photometric redshift range minimum (src.redshift.phot)
  zph1m  Pair1 photometric redshift range midpoint (src.redshift.phot)
  zph1u  Pair1 photometric redshift range maximum (src.redshift.phot)
  zsp1  (n) Pair1 spectroscopic redshift (src.redshift)
  f_zsp1 (char) Flag on zspec1 (Note 2)   (meta.code)

ALL cols		    
(n) indicates a possible blank or NULL column  
  zsp1b  (n) Second Pair1 spectroscopic redshift (src.redshift)
  r_zsp1b (char) [b] Reference for zspecb (Note 3)   (meta.ref;pos.frame)
  SDSS2 (char) Second component of Quasar pair name, JHHMMSS.ss+DDMMSS.s (meta.id.assoc)
  RA2 "h:m:s" Pair2 Hour of Right Ascension (J2000) (pos.eq.ra)
  DE2 "d:m:s" Pair2 Degree of Declination (J2000) (pos.eq.dec)
  umag2  Pair2 SDSS u band magnitude (Note 1)   (phot.mag;em.opt.U)
  gmag2  Pair2 SDSS g band magnitude (Note 1)   (phot.mag;em.opt.B)
  zph2l  Pair2 photometric redshift range minimum (src.redshift.phot)
  zph2m  Pair2 photometric redshift range midpoint (src.redshift.phot)
  zph2u  Pair2 photometric redshift range maximum (src.redshift.phot)
  zsp2  (n) Pair2 spectroscopic redshift (src.redshift)
  n_zsp2 (char) Note about Pair2 (Note 2)   (meta.note)
  zsp2b  (n) Pair2 alternative spectroscopic redshift (src.redshift)
  r_zsp2b (char) [b] Reference for zspec2b (Note 3)   (meta.ref;pos.frame)
  Delta arcsec Angular separation of Quasar pair (pos.angDistance)
  f_Delta (char) [*] Objects in high absorption regions (Ag>21) have a higher probability of being stars. (meta.code)
  SDSS  Display the SDSS data for the pair (from SDSS-DR6) (meta.ref.url)

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