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J/ApJS/243/2
  SiIV and NV absorption line SDSS quasar systems (Chen+, 2019)
spectrum
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img(gal)
1.J/ApJS/243/2/qsos(c)List of SDSS quasars from Tables 1 and 2; table added by CDS (322 rows)
2.J/ApJS/243/2/table1Catalog of SiIV Absorption Line Systems[spectrum] (716 rows)
3.J/ApJS/243/2/table2Catalog of NV Absorption Line Systems (584 rows)

 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)SDSS (char) (i) SDSS object name (HHMMSS.ss+DDMMSS.s; J2000) (meta.id;meta.main)
   (ALL)zem   [1.7/4.5] Quasar redshift (src.redshift)
  (1)SiIV  (n)Display the SiIV data for this SDSS (link to Table1) (meta.ref.url)
  (1)NV  (n)Display the NV data for this SDSS (link to Table2) (meta.ref.url)
  (1)CIV (char) Display CIV data from Chen+, 2018, J/ApJS/239/23 (meta.ref.url)
  (1)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (1)NED (char) ask the NED data-base about this object (meta.ref.url)
  (1)_RA deg (i) Positions from SDSS names (right ascension part) (pos.eq.ra;meta.main)
  (1)_DE deg (i) Positions from SDSS names (declination part) (pos.eq.dec;meta.main)
  (2+3)Pair   [1/358] ID number of a NAL pair (meta.id)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (2+3)Plate  SDSS spectra plate ID (meta.id;instr.plate)
  (2+3)MJD d SDSS spectra modified Julian Date of observation (time.epoch)
  (2+3)Fiber  SDSS spectra fiber ID (meta.id)
  (2+3)zabs   [1.73/4.14] Redshift, absorption line system, blue line of the SiIV doublet (src.redshift)
  (2)EW1393 0.1nm [0.05/4] Equivalent width at rest frame, SiIV 1393Å (spect.line.eqWidth)
  (2)e_EW1393 0.1nm [0/0.6] Uncertainty in EW1393 (Note 1)   (stat.error)
  (2)EW1402 0.1nm [0.04/3.8] Equivalent width at rest frame, SiIV 1402Å (spect.line.eqWidth)
  (2)e_EW1402 0.1nm [0/0.7] Uncertainty in EW1402 (Note 1)   (stat.error)
  (2+3)F1350 10-19W/m2/nm [6/422] Continuum 1350Å flux, rest frame; in 10–17erg/s/cm2/Å units (phot.flux)
  (2+3)e_F1350 10-19W/m2/nm [0.2/5] Uncertainty in flux1350 (stat.error)
  (2+3)Vr km/s [-4498/28417] Offset velocity, SiIV absorption line system to quasar redshift (Note G1)   (phys.veloc;arith.diff)
  (2+3)ID   [1/295] Identification number of the SiIV absorption line system (meta.id)
  (2+3)Sys  (n) [-2/2] System category (Note 2)   (meta.code)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (2+3)SL  (n) [0/17.4] Significance level of the variation (Note 3)   (stat.fit.goodness)
  (2+3)Sp (char) Interactive spectrum from SDSS-DR14 (meta.ref.url)
  (3)EW1238 0.1nm [0.1/3.3] Equivalent width at rest frame, NV1238Å (spect.line.eqWidth)
  (3)e_EW1238 0.1nm [0.02/0.5] Uncertainty in EW1238 (Note 1)   (stat.error)
  (3)EW1242 0.1nm [0.09/3.3] Equivalent width at rest frame, NV1242Å (spect.line.eqWidth)
  (3)e_EW1242 0.1nm [0.01/0.5] Uncertainty in EW1242 (Note 1)   (stat.error)

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