VizieR

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NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJS/221/32
  Narrow MgII absorption lines from SDSS-DR9Q (Chen+, 2015)
ReadMe+ftp
2015ApJS..221...32C
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spectrum
Post annotation 		img(gal)
1.J/ApJS/221/32/table1Catalog of Mg II absorption systems (18598 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-DR9Q identifier (VII/269; HHMMSS.ss+DDMMSS.s; J2000) (meta.id;meta.main)
  Plate  SDSS plate identifier (meta.id;instr.plate)
  MJD d [55176/55752] Modified Julian Date of the observation (time.epoch)
  Fiber  SDSS fiber identifier (meta.id)
  zem   [0.35/5.4] Redshift derived from emission lines (src.redshift)
  zabs   [0.29/2.7] Redshift derived from absorption lines (src.redshift)
  EW2796 0.1nm [0.2/8.2] Rest equivalent width of MgIIλ2796 (Å) (spect.line.eqWidth)
  s2796   [2/71] EW2796 divided by its 1σ error; significance of MgIIλ2796 detection (stat.error)
  EW2803 0.1nm [0.2/7.1] Rest equivalent width of MgIIλ2803 (Å) (spect.line.eqWidth)
  s2803   [2/65] EW2803 divided by its 1σ error; significance of MgIIλ2803 detection (stat.error)
  SNR2796   [1.9/63] Signal-to-noise ratio of MgIIλ2796 line (stat.snr)
  SNR2803   [1.9/60] Signal-to-noise ratio of MgIIλ2803 line (stat.snr)
  beta   [-0.02/0.74] Relative velocity, β (Note 1)   (phys.veloc;arith.diff)
  Sp  Interactive spectrum from SDSS (meta.ref.url)
spectrum
  Simbad  ask the Simbad data-base about this object (meta.ref.url)
  NED  ask the NED data-base about this object (meta.ref.url)
  _RA deg (i) Position from SDSS name (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Position from SDSS name (declination part) (pos.eq.dec;meta.main)

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