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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/A+A/478/701
  Color excess of SDSS quasars with DLA systems (Vladilo+, 2008)
ReadMe+ftp
2008A&A...478..701V
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/478/701/table2The pool of control quasars (1959 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  SDSS (char) SDSS identifier of the control quasar (HHMMSS.ss+DDMMSS.s, J2000) (meta.id;meta.main)
  zem  emission redshift of the control quasar (src.redshift)
  rmag mag SDSS r magnitude of the control quasar (phot.mag;em.opt.R)
  S/N  Mean signal-to-noise ratio of the SDSS spectrum (Note 1)   (stat.snr;stat.mean)
  SDSSdata  Display the SDSS data (meta.ref.url)
  Simbad  ask the Simbad data-base about this object
  _RA deg (i) Right ascension (derived from SDSS) for Eq=J2000 (pos.eq.ra;meta.main)
  _DE deg (i) Declination (derived from SDSS) for Eq=J2000 (pos.eq.dec;meta.main)

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