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Simple Target
List Of Targets
Fast Xmatch with large catalogs or Simbad
Target
Name (resolved by
Sesame
) or
Position
:
J2000
B1975
B1950
B1900
B1875
B1855
Galactic
Supergal.
Ecl.J2000
Target dimension:
deg
arcmin
arcsec
NB: The epoch used for the query is the original epoch of the table(s)
Radius
Box size
J/ApJS/258/18
-1
Damped Lyα systems from SDSS DR16Q (Chabanier+, 2022)
ReadMe+ftp
2022ApJS..258...18C
Similar Catalogs
spectrum
Post annotation
1.
J/ApJS/258/18/dr16dla
The DR16 damped Lyα (DLA) catalog
[spectrum]
(117458 rows)
meta
J/ApJS/258/18/dr16dla
Simple Constraint
List Of Constraints
Query by
Constraints
applied on Columns
(
Output Order:
+
-
)
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Column
Constraint
Explain
(
UCD
)
recno
Record number assigned by the VizieR team. Should Not be used for identification.
(
meta.record
)
(
RECORD
)
ID
(n)
[7095815/554679218] The SDSS identifier as found in DR16Q, Cat.
VII/289
(THING_ID)
(
meta.id;meta.main
)
(
ID_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
)
(
REDSHIFT_HC
)
zCNN
[2/5.4] Absorber redshift as found by the convolutional neural networks (CNN; Parks+
2018MNRAS.476.1151P
) (Z_CNN)
(
src.redshift;pos.heliocentric
)
(
REDSHIFT_HC
)
Conf
[0.1/1] Confidence parameter of the CNN (>0.5=highly confident absorbers) (CONF_CNN)
(
meta.code.qual
)
(
CODE_QUALITY
)
NHIcnn
[cm-2]
[19.7/22.3] Logarithm of the absorber column density as found by the CNN (NHI_CNN)
(
phys.columnDensity
)
(
PHYS_COLUMN_DENSITY
)
Flux
10-19W/m2/nm
(n)
[-0.99/73.6] Mean forest flux in 10
–19
W/m
2
/nm units (MEAN_FLUX)
(Note 2)
(
phot.flux
)
(
SPECT_FLUX_VALUE
)
SNR
[-1.3/41] Mean signal-to-noise ratio of the sight line
(
stat.snr;stat.mean
)
(
INST_S/N
)
Plate
[269/11704] SDSS spectroscopic plate of the sight line as found in DR16Q
(
pos.parallax.spect;instr.plate
)
(
ID_PLATE
)
MJD
d
(i)
[51612/58543] SDSS modified Julian date of observation of the sight line as found in DR16Q
(
time.epoch
)
(
TIME_DATE
)
Fiber
[1/1000] SDSS spectroscopic fiber identification of the sight line as found in DR16Q (FIBERID)
(
meta.id.assoc;pos.parallax.spect;spect.line
)
(
ID_FIBER
)
RAJ2000
deg
(i)
Right ascension (J2000) of the sight line as found in DR16Q (RA)
(
pos.eq.ra;meta.main
)
(
POS_EQ_RA_MAIN
)
DEJ2000
deg
(i)
[-17.6/70] Declination (J2000) of the sight line as found in DR16Q (DEC)
(
pos.eq.dec;meta.main
)
(
POS_EQ_DEC_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≤λ
RF
<1216Å (NHI_FIT)
(
phys.columnDensity
)
(
PHYS_COLUMN_DENSITY
)
Sp
Interactive spectrum from SDSS-DR16
(
meta.ref.url
)
(
DATA_LINK
)
spectrum
SimbadName
(char)
(n)
Designation understandable by the
Simbad
data-base
(
meta.id
)
(
ID_ALTERNATIVE
)
NED
ask the
NED
data-base about this object
(
meta.ref.url
)
(
DATA_LINK
)
ALL
cols
(n)
indicates a possible blank or NULL column
(i)
indexed column
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UCD1+
UCD1
https://cdsannotations.u-strasbg.fr/annotations/vizierTable//
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