VizieR

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Target Name (resolved by Sesame) or Position:
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NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJS/258/18
  Damped Lyα systems from SDSS DR16Q (Chabanier+, 2022)
spectrum
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img(gal)
1.J/ApJS/258/18/dr16dlaThe DR16 damped Lyα (DLA) catalog[spectrum] (117458 rows)

 
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)
  ID  (n) [7095815/554679218] The SDSS identifier as found in DR16Q, Cat. VII/289 (THING_ID) (meta.id;meta.main)
  zQSO   [2/5.6] Quasar redshift of the sight line using the Z_PCA estimator of DR16Q (Z_QSO) (Note 1)   (src.redshift;pos.heliocentric)
  zCNN   [2/5.4] Absorber redshift as found by the convolutional neural networks (CNN; Parks+ 2018MNRAS.476.1151P) (Z_CNN) (src.redshift;pos.heliocentric)
  Conf   [0.1/1] Confidence parameter of the CNN (>0.5=highly confident absorbers) (CONF_CNN) (meta.code.qual)
  NHIcnn [cm-2] [19.7/22.3] Logarithm of the absorber column density as found by the CNN (NHI_CNN) (phys.columnDensity)
  Flux 10-19W/m2/nm(n) [-0.99/73.6] Mean forest flux in 10–19W/m2/nm units (MEAN_FLUX) (Note 2)   (phot.flux)
  SNR   [-1.3/41] Mean signal-to-noise ratio of the sight line (stat.snr;stat.mean)
  Plate   [269/11704] SDSS spectroscopic plate of the sight line as found in DR16Q (pos.parallax.spect;instr.plate)
  MJD d (i) [51612/58543] SDSS modified Julian date of observation of the sight line as found in DR16Q (time.epoch)
  Fiber   [1/1000] SDSS spectroscopic fiber identification of the sight line as found in DR16Q (FIBERID) (meta.id.assoc;pos.parallax.spect;spect.line)
  RAJ2000 deg (i) Right ascension (J2000) of the sight line as found in DR16Q (RA) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) [-17.6/70] Declination (J2000) of the sight line as found in DR16Q (DEC) (pos.eq.dec;meta.main)
  NHIfit [cm-2] (n) [19.29/22.4] Logarithm of the absorber column density as found by the Voigt profile fitter for absorbers in the rest-frame range 1040Å≤λRF<1216Å (NHI_FIT) (phys.columnDensity)
  Sp  Interactive spectrum from SDSS-DR16 (meta.ref.url)
spectrum
  SimbadName (char) (n)Designation understandable by the Simbad data-base (meta.id)
  NED  ask the NED data-base about this object (meta.ref.url)

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