VII/289 SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release.
Lyke B.W., Higley A.N., McLane J.N., Schurhammer D.P., Myers A.D.,
Ross A.J., Dawson K., Chabanier S., Martini P., Busca N.G.,
du Mas des Bourboux H., Salvato M., Streblyanska A., Zarrouk P., Burtin E.,
Anderson S.F., Bautista J., Bizyaev D., Brandt W.N., Brinkmann J.,
Brownstein J.R., Comparat J., Green P., de la Macorra A.,
Munoz Gutierrez A., Hou J., Newman J.A., Palanque-Delabrouille N.,
Paris I., Percival W.J., Petitjean P., Rich J., Rossi G., Schneider D.P.,
Smith A., Vivek M., Weaver B.A.
<Astrophys. J. Suppl. Ser., 250, 8 (2020)>
=2020ApJS..250....8L 2020ApJS..250....8L
=2020yCat.7289....0L 2020yCat.7289....0L
ADC_Keywords: Surveys ; QSOs ; Spectra, optical ; Redshifts ;
Cross identifications
Keywords: Catalogs ; Surveys ; Quasars ; Cosmology ;
Large-scale structure of the universe ; Observational cosmology
Abstract:
We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar
catalog from Data Release 16 of the extended Baryon Oscillation
Spectroscopic Survey (eBOSS). This catalog comprises the largest
selection of spectroscopically confirmed quasars to date. The full
catalog includes two subcatalogs (the current versions are DR16Q_v4
and DR16QSupersetv3 at http://data.sdss.org/sas/dr16/eboss/qso/DR16Q):
a "superset" of all SDSS-IV/eBOSS objects targeted as quasars
containing 1,440,615 observations and a quasar-only catalog containing
750,414 quasars, including 225,082 new quasars appearing in an SDSS
data release for the first time, as well as known quasars from
SDSS-I/II/III. We present automated identification and redshift
information for these quasars alongside data from visual inspections
for 320,161 spectra. The quasar-only catalog is estimated to be 99.8%
complete with 0.3%-1.3% contamination. Automated and visual inspection
redshifts are supplemented by redshifts derived via principal
component analysis and emission lines. We include emission-line
redshifts for Hα, Hβ, MgII, CIII], CIV, and Lyα.
Identification and key characteristics generated by automated
algorithms are presented for 99,856 broad absorption-line quasars and
35,686 damped Lyman alpha quasars. In addition to SDSS photometric
data, we also present multiwavelength data for quasars from the Galaxy
Evolution Explorer, UKIDSS, the Wide-field Infrared Survey Explorer,
FIRST, ROSAT/2RXS, XMM-Newton, and Gaia.
Description:
In this paper, we detail DR16Q, the final SDSS-IV/eBOSS quasar catalog.
The catalog consists of two subcatalogs: the DR16Q superset containing
1440615 observations targeted as quasars, and the quasar-only set
containing 750414 quasars. The quasar-only catalog includes 225082 new
quasars observed after the release of DR14Q, a 42% increase in the
catalog size. We estimate the quasar-only catalog to be 99.8% complete
with 0.3%-1.3% contamination. We include automated pipeline redshifts
for all quasars observed as part of SDSS-III/IV and confident visual
inspection redshifts for 320161 quasars.
Spectroscopy for SDSS-IV/eBOSS was conducted using the BOSS
spectrographs on the 2.5m Sloan Telescope. Two spectrographs each
recorded data from 500 fibers on a 2k CCD with square 24um pixels and
a wavelength range of 3600-10400Å at a spectral resolution of
λ/Δλ∼2000.
DR16Q includes spectra obtained using both the BOSS spectrographs and
the SDSS-I/II spectrographs (3800-9100Å) and SDSS-III/BOSS over the
four SDSS campaigns (MJD 51608-58543; March 2000-March 2019).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
dr16q.dat 2099 750414 The SDSS quasar-only catalog from DR16 (DR16Q)
dr16qdup.dat 1436 119924 The duplicate spectroscopic observations
for DR16Q
superset.dat 2921 1440615 The "superset" of all SDSS-IV/eBOSS objects
targeted as quasars
--------------------------------------------------------------------------------
Description of files:
DR16Q_v4.fits and DR16QSupersetv3.fits, the original FITS files, are also
available on the FTP.
See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)
VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)
J/AJ/123/567 : SDSS quasar cat. I: Early Data Release (Schneider+, 2002)
J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)
J/A+A/480/611 : XMM-Newton slew survey catalogue, XMMSL1 (Saxton+, 2008)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/742/49 : Variable radio sources in FIRST (Thyagarajan+, 2011)
J/A+A/548/A66 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015)
J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) catalog (Boller+, 2016)
J/ApJ/824/130 : SDSS/BOSS/TDSS CIV BAL quasars (Grier+, 2016)
J/ApJ/831/7 : SDSS-RM project: peak velocities of QSOs (Shen+, 2016)
J/MNRAS/469/3163 : Properties of BAL quasars (McGraw+, 2017)
J/MNRAS/473/4937 : AllWISE ctp to ROSAT/2RXS & XMMSLEW2 (Salvato+, 2018)
J/A+A/636/A97 : SDSS-IV/SPIDERS X-ray PS Spectrosc. Cat. (Comparat+, 2020)
J/MNRAS/492/719 : Chandra obs. of 2106 radio-quiet QSOs (Timlin+, 2020)
http://www.sdss.org/dr16/algorithms/qso_catalog : SDSS QSO DR16 home page
Byte-by-byte Description of file: dr16q.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS-DR16 designation
(HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME)
20- 29 F10.6 deg RAdeg Right Ascension (J2000) (RA)
31- 40 F10.6 deg DEdeg [-17.53/84.44] Declination (J2000) (DEC)
42- 46 I5 --- Plate Spectroscopic plate number (G1)
48- 52 I5 --- MJD [51608/58543] Spectroscopic Modified
Julian Date (G1)
54- 57 I4 --- Fiber Spectroscopic fiber number (FIBERID) (G1)
--------------------------------------------------------------------------------
59- 64 A6 --- QN Object classification post-QuasarNET (Busca
& Balland 2018arXiv180809955B 2018arXiv180809955B)
(AUTOCLASS_PQN) (1)
66- 71 A6 --- DR14Q Object classification based only on the DR14Q
algorithm (AUTOCLASS_DR14Q)
73- 74 I2 --- QQN Binary flag for QuasarNET quasar
identification (1=QSO;
-1=not processed by QuasarNET) (ISQSOQN)
76- 84 F9.6 --- zQN [-0.4/6.51]?=-1 Redshift derived
by QuasarNET (Z_QN)
--------------------------------------------------------------------------------
86 I1 --- 10K [0/1] Binary flag indicating objects selected
for random visual inspection
(0=not selected) (RANDOM_SELECT) (G2)
88- 98 F11.6 --- z10K [0.1/4.3]?=-1 Redshift from visual inspection
of random set (Z_10K)
100-101 I2 --- f_z10K [-1/3] Confidence rating for visual inspection
redshift of random set (3:highest confidence)
(ZCONF10K) (G3)
103-104 I2 --- C10K Binary flag indicating if the automated
pipeline classification and redshift were
correct in the random set
(PIPECORR10K) (G4)
106-107 I2 --- Q10K Binary flag for random set quasar
identification (1=QSO;
-1=not randomly selected) (ISQSO10K)
109-117 I9 --- THINGID ?=-1 SDSS identifier mainly for BOSS and eBOSS
objects (THING_ID)
--------------------------------------------------------------------------------
119-129 F11.6 --- zvis [0.001/7.02]?=-1 Redshift from visual
inspection (Z_VI)
131-132 I2 --- f_zvis [-1/3]? Confidence rating for visual
inspection redshift (3: highest confidence)
(Z_CONF)
134-135 I2 --- Class [0/50]? Object classification from visual
inspection (CLASS_PERSON) (2)
137-145 F9.6 --- zDR12Q [0.04/6.5]?=-1 Redshift taken from DR12Q
(Cat. VII/279) visual inspection (Z_DR12Q)
147-148 I2 --- QDR12Q Flag indicating if an object was a quasar
in DR12Q (1=QSO) (ISQSODR12Q)
150-156 F7.4 --- zDR7Q [0.06/5.47]?=-1 Redshift taken from DR7Q
(Cat. VII/260) catalog (ZDR7QSCH)
158-159 I2 --- QDR7Q Flag indicating if an object was a quasar
in DR7Q (ISQSODR7Q)
161-169 F9.6 --- zDR6Q [0.07/5.5]?=-1 Redshift taken from DR6
(Hewett & Wild, 2010, J/MNRAS/405/2302)
(ZDR6QHW)
171-179 F9.6 --- zDR7Qa [0.06/5.5]?=-1 Redshift taken from DR7
(Shen+ 2011, J/ApJS/194/45)
catalog ancillary columns (ZDR7QHW) (G5)
181 I1 --- QSO [1/2] Flag indicating quasars included in
final catalog (1=QSO; 2=questionable
-- see Section 3.6) (ISQSOFINAL)
183-193 F11.6 --- z [-0.0027/7.03]?=- Best available redshift
195-203 A9 --- r_z Source for redshift z (SOURCE_Z) (3)
205-213 F9.6 --- zPipe [-0.0084/7.05]?=-1 Redshift from SDSS pipeline
version v5130 (Z_PIPE)
215-217 I3 --- q_zPipe [-1/68] Quality flag on SDSS pipeline redshift
estimate (ZWARNING) (G6)
219-237 A19 --- objID SDSS object identification number
(sky version, run, rerun, camera column,
field number, and ID) (G7)
--------------------------------------------------------------------------------
239-250 F12.6 --- zPCA [-1008/7.3] PCA redshift derived by the
redvsblue algorithm (Z_PCA)
252-255 I4 --- q_zPCA [0/1056] Warning flag for redvsblue
redshift (ZWARN_PCA) (G6)
257-267 E11.6 --- Chi2PCA [7/3.31e+7] Δχ2 for PCA redshift
versus cubic continuum fit (DELTACHI2_PCA)
269-277 F9.6 --- zHa [-0.015/0.53]?=-1 PCA line redshift for
Hα from redvsblue (Z_HALPHA)
279-282 I4 --- q_zHa [0/7682] Warning flag for Hα
(ZWARN_HALPHA) (G6)
284-294 E11.6 --- Chi2Ha [0/2.2e+6] Δχ2 for Hα line
redshift versus cubic continuum fit
(DELTACHI2_HALPHA)
296-304 F9.6 --- zHb [-0.02/1.1]?=-1 PCA line redshift for Hβ
from redvsblue (Z_HBETA)
306-309 I4 --- q_zHb [0/7682] Warning flag for Hβ
(ZWARN_HBETA) (G6)
311-321 E11.6 --- Chi2Hb [0/525536] Δχ2 for Hβ line
versus cubic continuum fit (DELTACHI2_HBETA)
323-331 F9.6 --- zMgII [0.28/2.6]?=-1 PCA line redshift for MgII
from redvsblue (Z_MGII)
333-336 I4 --- q_zMgII [0/7682] Warning flag for MgII
(ZWARN_MGII) (G6)
338-348 E11.6 --- Chi2MgII [0/384079] Δχ2 for MgII line
redshift versus cubic continuum fit
(DELTACHI2_MGII)
350-358 F9.6 --- zCIII [0.8/4.3]?=-1 PCA line redshift for CIII]
from redvsblue (Z_CIII)
360-363 I4 --- q_zCIII [0/7682] Warning flag for CIII]
(ZWARN_CIII) (G6)
365-375 E11.6 --- Chi2CIII [0/547655] Δχ2 for CIII] line
redshift versus cubic continuum fit
(DELTACHI2_CIII)
377-385 F9.6 --- zCIV [1.3/5.5]?=-1 PCA line redshift for CIV
from redvsblue (Z_CIV)
387-390 I4 --- q_zCIV [0/7682] Warning flag for CIV (ZWARN_CIV) (G6)
392-402 E11.6 --- Chi2CIV [0/5.5e+6] Δχ2 for CIV line
redshift versus cubic continuum fit
(DELTACHI2_CIV)
404-412 F9.6 --- zLyA [1.9/7.3]?=-1 PCA line redshift for Lyα
from redvsblue (Z_LYA)
414-417 I4 --- q_zLyA [0/7682] Warning flag for Lyα
(ZWARN_LYA) (G6)
419-429 E11.6 --- Chi2LyA [0/4.5e+6] Δχ2 for Lyα line
redshift versus cubic continuum fit
(DELTACHI2_LYA)
431-439 F9.6 --- zLyaB [0.03/4]?=-1 PCA redshift derived from spectra
masked blueward of Lyα (Z_LYAWG)
--------------------------------------------------------------------------------
441-449 F9.6 --- zDLA1 [1.9/6.2]?=-1 Redshift for damped Lyα
feature 1 (Z_DLA1)
451-459 F9.6 --- zDLA2 [2/5.2]?=-1 Redshift for damped Lyα
feature 2 (Z_DLA2)
461-469 F9.6 --- zDLA3 [2.1/4.9]?=-1 Redshift for damped Lyα
feature 3 (Z_DLA3)
471-479 F9.6 --- zDLA4 [2.4/3.7]?=-1 Redshift for damped Lyα
feature 4 (Z_DLA4)
481-489 F9.6 --- zDLA5 [2.8/3.3]?=-1 Redshift for damped Lyα
feature 5 (Z_DLA5)
491-499 F9.6 [-] NHIDLA1 [20.3/22]?=-1 Absorber column density for
damped Lyα feature 1 (NHI_DLA1)
501-509 F9.6 [-] NHIDLA2 [20.3/21.8]?=-1 Absorber column density for
damped Lyα feature 2 (NHI_DLA2)
511-519 F9.6 [-] NHIDLA3 [20.3/21.4]?=-1 Absorber column density for
damped Lyα feature 3 (NHI_DLA3)
521-529 F9.6 [-] NHIDLA4 [20.3/21.1]?=-1 Absorber column density for
damped Lyα feature 4 (NHI_DLA4)
531-539 F9.6 [-] NHIDLA5 [20.5/20.6]?=-1 Absorber column density for
damped Lyα feature 5 (NHI_DLA5)
541-547 F7.4 --- f_zDLA1 Confidence of detection for
damped Lyα feature 1 (CONF_DLA1)
549-555 F7.4 --- f_zDLA2 Confidence of detection for
damped Lyα features (CONF_DLA2)
557-563 F7.4 --- f_zDLA3 Confidence of detection for
damped Lyα features (CONF_DLA3)
565-571 F7.4 --- f_zDLA4 Confidence of detection for
damped Lyα features (CONF_DLA4)
573-579 F7.4 --- f_zDLA5 Confidence of detection for
damped Lyα features (CONF_DLA5)
581-589 F9.6 --- PBAL [-1/1] BAL probability (BAL_PROB) (G8)
591-602 F12.5 km/s BI(CIV) [/109061]?=-1 BALnicity index for
the CIV region (BI_CIV)
604-615 E12.6 km/s e_BI(CIV) [0/3.1e+38]?=- BI(CIV) uncertainty
(ERRBICIV)
617-628 F12.5 km/s AI(CIV) [-618/121609]?=-1 Absorption index for
the CIV region (AI_CIV)
630-641 E12.6 km/s e_AI(CIV) [0/10897]?=- AI(CIV) uncertainty (ERRAICIV)
643-653 F11.5 km/s BI(SIIV) [/85220]?=-1 BALnicity index for
the SiIV region (BI_SIIV)
655-666 E12.6 km/s e_BI(SIIV) [0/1985]?=- BI(SIIV) uncertainty (ERRBISIIV)
668-678 F11.5 km/s AI(SIIV) [/45671]?=-1 Absorption index for
the SiIV region (AI_SIIV)
680-691 E12.6 km/s e_AI(SIIV) [0/1622]?=- AI(SIIV) uncertainty (ERRAISIIV)
--------------------------------------------------------------------------------
693-706 I14 --- Btarg1 BOSS target selection flag for the
main survey (BOSS_TARGET1)
708-720 I13 --- eBOSST0 eBOSS target selection flag for the
pilot survey (SEQUELS) (EBOSS_TARGET0)
722-735 I14 --- eBOSST1 eBOSS target selection flag for the
main survey (EBOSS_TARGET1)
737-755 I19 --- eBOSST2 eBOSS target 2 selection flag for the
main survey (EBOSS_TARGET2)
757-775 I19 --- Atarg1 BOSS target selection flag for the
ancillary surveys (ANCILLARY_TARGET1)
777-795 I19 --- Atarg2 BOSS target 2 selection flag for the
ancillary surveys (ANCILLARY_TARGET2)
-------------------------------------------------------------------------------
797 I1 --- NspI [0/1] Number of additional spectra
from SDSS-I/II (NSPEC_SDSS) (G9)
799-800 I2 --- NspBOSS [0/73] Number of additional spectra
from BOSS/eBOSS (NSPEC_BOSS) (G9)
802-803 I2 --- Nsp [0/73] Total number of additional
spectra (NSPEC) (G9)
--------------------------------------------------------------------------------
805 I1 --- Sky [2]?=0 SDSS photometric sky version
number (SKYVERSION)
807-810 I4 --- Run [94/8162]?=0 SDSS imaging run number of
photometric measurements (RUN_NUMBER)
812-814 I3 --- Rerun [157/301]? SDSS photometric processing rerun
number (RERUN_NUMBER)
816 I1 --- Cam [1/6]?=0 SDSS camera column
number (CAMCOL_NUMBER)
818-820 I3 --- Field [11/872]?=0 SDSS field number (FIELD_NUMBER)
822-825 I4 --- photID [2/4093]?=0 SDSS photometric ID (ID_NUMBER)
827-830 I4 0.1nm lambda [4000/7500] Wavelength for which the fiber
placement was optimized to account for
atmospheric differential refraction
(Dawson+ 2013AJ....145...10D 2013AJ....145...10D), in Å
(LAMBDA_EFF)
832-841 F10.6 um Offset [0/300] Backstopping offset distance (ZOFFSET)
843-853 F11.6 mm Xfocal [-325/325] Hole x-axis position in focal plane
855-865 F11.6 mm Yfocal [-325/326] Hole y-axis position in focal plane
867-880 A14 --- Chunk Name of tiling chunk (from the plate-list
product)
882-887 I6 --- Tile [-3/17691] Tile number
889-898 F10.6 --- SN2 [0/334] Overall (S/N)2 measure for plate,
minimum of all four cameras (PLATESN2)
--------------------------------------------------------------------------------
900- 911 F12.6 3.63uJy Fu [-45/2001]?=- PSF flux in u-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXu)
913- 924 F12.6 3.63uJy Fg [-0.3/1756]?=- PSF flux in g-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXg)
926- 937 F12.6 3.63uJy Fr [-0.6/1646]?=- PSF flux in r-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXr)
939- 950 F12.6 3.63uJy Fi [-31/2324]?=- PSF flux in i-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXi)
952- 963 F12.6 3.63uJy Fz [-3.2/1777]?=- PSF flux in z-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXz)
965- 976 F12.6 3.63uJy IVFu [0/233]?=- Inverse variance of Fu in nMgy
(PSFFLUX_IVARu)
978- 989 F12.6 3.63uJy IVFg [0/643]?=- Inverse variance of Fg in nMgy
(PSFFLUX_IVARg)
991-1002 F12.6 3.63uJy IVFr [0/160]?=- Inverse variance of Fr in nMgy
(PSFFLUX_IVARr)
1004-1015 F12.6 3.63uJy IVFi [0/74]?=- Inverse variance of Fi in nMgy
(PSFFLUX_IVARi)
1017-1028 F12.6 3.63uJy IVFz [0/9]?=- Inverse variance of Fz in nMgy
(PSFFLUX_IVARz)
1030-1039 F10.4 mag umag [14.2/31]?=- PSF (AB) magnitude in u band
(not corrected for Galactic extinction)
(PSFMAGu)
1041-1050 F10.4 mag gmag [14.3/26.4]?=- PSF (AB) magnitude in g band
(not corrected for Galactic extinction)
(PSFMAGg)
1052-1061 F10.4 mag rmag [14.4/26.6]?=- PSF (AB) magnitude in r band
(not corrected for Galactic extinction)
(PSFMAGr)
1063-1072 F10.4 mag imag [14/30]?=- PSF (AB) magnitude in i band
(not corrected for Galactic extinction)
(PSFMAGi)
1074-1083 F10.4 mag zmag [14.3/24.5]?=- PSF (AB) magnitude in z band
(not corrected for Galactic extinction)
(PSFMAGz)
1085-1096 E12.6 mag e_umag [0.007/2.7e+6]?=- umag uncertainty (PSFMAGERRu)
1098-1109 E12.6 mag e_gmag [0.007/38]?=- gmag uncertainty (PSFMAGERRg)
1111-1122 E12.6 mag e_rmag [0.005/26]?=- rmag uncertainty (PSFMAGERRr)
1124-1135 E12.6 mag e_imag [0.006/2.4e+6]?=- imag uncertainty (PSFMAGERRi)
1137-1148 E12.6 mag e_zmag [0.008/114]?=- zmag uncertainty (PSFMAGERRz)
1150-1161 F12.6 mag Extu [0.009/3.8]?=- Galactic extinction in
the u-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONu)
1163-1174 F12.6 mag Extg [0.007/2.8]?=- Galactic extinction in
the g-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONg)
1176-1187 F12.6 mag Extr [0.005/2.1]?=- Galactic extinction in
the r-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONr)
1189-1200 F12.6 mag Exti [0.003/1.6]?=- Galactic extinction in
the i-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONi)
1202-1213 F12.6 mag Extz [0.002/1.1]?=- Galactic extinction in
the z-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONz)
1215-1222 F8.4 mag iMAG [-31.4/2] Absolute i-band magnitude, Mi[z=2]
using zPCA redshift, corrected for extinction
(M_I) (4)
1224-1230 F7.4 --- SNR [-1.6/77] S/N median value for all good
pixels in the five bands (SNMEDIANALL)
--------------------------------------------------------------------------------
1232 I1 --- GALEX GALEX matching flag (1=match) (GALEX_MATCHED)
1234-1242 F9.4 3.63uJy FFUV [-1.4/1318] FUV flux for GALEX in nMgy (FUV)
1244-1253 F10.4 3.63uJy IVFUV [-1/68408] Inverse variance of FFUV in nMgy
(FUV_IVAR)
1255-1263 F9.4 3.63uJy FNUV [-1.3/1235] NUV flux for GALEX in nMgy (NUV)
1265-1274 F10.4 3.63uJy IVNUV Inverse variance of the NUV flux
in nMgy (NUV_IVAR)
--------------------------------------------------------------------------------
1276 I1 --- UKIDSS UKIDSS DR8 matching flag (UKIDSS_MATCHED)
1278-1289 E12.6 W/m2/Hz FY [-5e-30/1.2e-29]?=- Y-band flux density
from UKIDSS (YFLUX)
1291-1302 E12.6 W/m2/Hz e_FY [5.8e-33/6.7e-30]?=- FY uncertainty
(YFLUX_ERR)
1304-1315 E12.6 W/m2/Hz FJ ?=- J-band flux density from UKIDSS (JFLUX)
1317-1328 E12.6 W/m2/Hz e_FJ ?=- FJ uncertainty (JFLUX_ERR)
1330-1341 E12.6 W/m2/Hz FH ?=- H-band flux density from UKIDSS (HFLUX)
1343-1354 E12.6 W/m2/Hz e_FH ?=- FH uncertainty (HFLUX_ERR)
1356-1367 E12.6 W/m2/Hz FK ?=- K-band flux density from UKIDSS (KFLUX)
1369-1380 E12.6 W/m2/Hz e_FK ?=- FK uncertainty (KFLUX_ERR)
--------------------------------------------------------------------------------
1382-1393 E12.6 309.05nJy FW1 [-84770/197356] WISE flux in the W1 band
(3.4um; Vega, nanomaggies) (W1_FLUX) (5)
1395-1406 E12.6 309.05nJy-2 IVW1 [4.5e-6/0.14]?=- Inverse variance of FW1
(Vega, nanomaggies-2) (W1FLUXIVAR)
1408-1414 F7.4 mag W1mag [9.2/31.2]?=- WISE W1-band magnitude
(Vega) (W1_MAG)
1416-1425 F10.4 mag e_W1mag [0.0001/52540]?=- W1mag uncertainty
(W1MAGERR)
1427-1438 E12.6 --- Chi2W1 [-1/1.2e+6] Profile-weighted ξ2 for
the W1 band (W1_CHI2)
1440-1449 F10.4 --- SNFW1 [-5564/14926] Signal-to-noise ratio for
the W1 band from the flux and inverse
variance (W1FLUXSNR)
1451-1459 F9.6 --- fracW1 [-1/1] Fraction of source in
profile-weighted fit (W1SRCFRAC)
1461-1472 E12.6 --- ExtFW1 [-12060/6841] Amount of flux added to the
profile by nearby sources (W1EXTFLUX)
1474-1484 F11.6 --- ExtW1 [-205/2488] Fraction of profile flux from
nearby sources (W1EXTFRAC)
1486-1490 I5 --- NW1 [-1/3817] Number of pixels included in the
profile fit (W1_NPIX)
1492-1503 E12.6 167.66nJy FW2 [-127664/527681] WISE flux in the W2 band
(4.6um; Vega, nanomaggies) (W2_FLUX)
1505-1516 F12.6 167.66nJy-2 IVW2 [0/0.011]?=- Inverse variance of FW2
(Vega, nanomaggies-2) (W2FLUXIVAR)
1518-1524 F7.4 mag W2mag [8.1/31.4]?=- WISE W2-band magnitude
(Vega) (W2_MAG)
1526-1536 F11.4 mag e_W2mag [0.0002/245404]?=- W2mag uncertainty
(W2MAGERR)
1538-1549 E12.6 --- Chi2W2 [-1/114995] Profile-weighted ξ2 for
the W2 band (W2_CHI2)
1551-1560 F10.4 --- SNFW2 [-2241/6734] Signal-to-noise ratio for
the W2 band from flux and inverse
variance (W2FLUXSNR)
1562-1570 F9.6 --- fracW2 [-1/1] Fraction of source in the
profile-weighted fit (W2SRCFRAC)
1572-1583 E12.6 --- ExtFW2 [-9089/6580] Amount of flux added to the
profile by nearby sources (W2EXTFLUX)
1585-1596 F12.6 --- ExtW2 [-9.7/12145] Fraction of profile flux
from nearby sources (W2EXTFRAC)
1598-1602 I5 --- NW2 [-1/3306] Number of pixels included in
the profile fit (W2_NPIX)
--------------------------------------------------------------------------------
1604 I1 --- FIRST Matching flag for FIRST (FIRST_MATCHED)
1606-1615 F10.4 mJy F1.4p [0.75/14775]?=- FIRST peak flux density
at 20cm (FIRST_FLUX)
1617-1626 F10.4 --- SNF [5/21190]?=- FIRST flux density S/N
(FIRST_SNR)
1628-1634 F7.4 arcsec SepF [/2]?=-1 SDSS-FIRST separation
(SDSS2FIRST_SEP)
--------------------------------------------------------------------------------
1636-1642 F7.4 mag Jmag [13/19]?=- 2MASS (Vega) J-band magnitude
1644-1650 F7.4 mag e_Jmag [0.018/3]?=- Jmag uncertainty (JMAG_ERR)
1652-1659 F8.4 --- SNRJ [2.9/215]?=- 2MASS J-band S/N (JSNR)
1661-1662 I2 --- f_Jmag [-1/6] 2MASS J-band photometry flag
(JRDFLAG)
1664-1670 F7.4 mag Hmag [12.2/18.2]?=- 2MASS (Vega) H-band magnitude
1672-1678 F7.4 mag e_Hmag [0.015/0.6]?=- Hmag uncertainty (HMAG_ERR)
1680-1687 F8.4 --- SNRH [1.9/213]?=- 2MASS H-band S/N (HSNR)
1689-1690 I2 --- f_Hmag 2MASS H-band photometry flag (HRDFLAG)
1692-1698 F7.4 mag Kmag [11.3/17.7]?=- 2MASS (Vega) K-band magnitude
1700-1706 F7.4 mag e_Kmag [0.017/1]?=- Kmag uncertainty (KMAG_ERR)
1708-1715 F8.4 --- SNRK [2.2/259]?=- 2MASS K-band S/N (KSNR)
1717-1718 I2 --- f_Kmag 2MASS K-band photometry flag (KRDFLAG)
1720-1726 F7.4 arcsec Sep2M [0.002/2]?=-1 SDSS-2MASS separation
(SDSS2MASS_SEP)
--------------------------------------------------------------------------------
1728-1731 A4 --- --- [2RXS ]
1733-1748 A16 --- 2RXS 2nd ROSAT identifier ( 2RXS_ID)
1750-1759 F10.5 deg RARdeg ?=-1 Right ascension of the ROSAT source
(J2000) ( 2RXS_RA)
1761-1769 F9.5 deg DERdeg ?=-1 Declination of the ROSAT source
(J2000) ( 2RXS_DEC)
1771-1782 E12.6 mW/m2 F0.5-2 [1e-13/5.6e-11]?=- ROSAT source flux in
the 0.5-2.0keV band in erg/s/cm2
( 2RXSSRCFLUX)
1784-1795 E12.6 mW/m2 e_F0.5-2 [0/3.6e-12]?=- F0.5-2 uncertainty
( 2RXSSRCFLUX_ERR)
1797-1803 F7.4 arcsec SepRX [0.12/97.4]?=-1 SDSS-ROSAT separation
(SDSS2ROSAT_SEP)
--------------------------------------------------------------------------------
1805-1819 I15 --- XMM ?=-1 XMM source number (XMMSRCID)
1821-1830 F10.6 deg RAXdeg ?=-1 XMM right ascension (J2000) (XMM_RA)
1832-1841 F10.6 deg DEXdeg ?=-1 XMM declination (J2000) (XMM_DEC)
1843-1854 E12.6 mW/m2 F0.2-2 [0/6.4e-12]?=- XMM soft (0.2-2.0keV) X-ray
flux in erg/s/cm2 (XMMSOFTFLUX)
1856-1867 E12.6 mW/m2 e_F0.2-2 [5.2e-17/5e-14]?=- F0.2-2 uncertainty
(XMMSOFTFLUX_ERR)
1869-1880 E12.6 mW/m2 F2-12 [0/8.6e-12]?=- XMM hard (2.0-12.0keV) X-ray
flux in erg/s/cm2 (XMMHARDFLUX)
1882-1893 E12.6 mW/m2 e_F2-12 [3.5e-16/3.3e-13]?=- F2-12 uncertainty
(XMMHARDFLUX_ERR)
1895-1906 E12.6 mW/m2 F0.2-12 [1.8e-15/1.5e-11]?=- XMM total (0.2-12.0keV)
X-ray flux in erg/s/cm2 (XMMTOTALFLUX)
1908-1919 E12.6 mW/m2 e_F0.2-12 [5.5e-16/4.7e-13]?=- F0.2-12 uncertainty
(XMMTOTALFLUX_ERR)
1921-1922 I2 10-7W LX [-1]?=- Total (0.2-12.0keV) X-ray
luminosity in erg/s (always "-1")
(XMMTOTALLUM)
1924-1930 F7.4 arcsec SepXM [0.0026/12]?=-1 SDSS-XMM-Newton separation
(SDSS2XMM_SEP)
--------------------------------------------------------------------------------
1932 I1 --- MatchG [0/1] Gaia matching flag (GAIA_MATCHED)
1934-1941 A8 --- --- [Gaia DR2 -1]
1943-1961 I19 --- Gaia ? Gaia DR2 identifier (GAIA_DESIGNATION)
1963-1973 F11.7 deg RAGdeg ?=-1 Gaia barycentric right ascension
(J2015.5) (GAIA_RA)
1975-1985 F11.7 deg DEGdeg ?=-1 Gaia barycentric declination
(J2015.5) (GAIA_DEC)
1987-1994 F8.4 mas Plx [-25.2/14] Gaia absolute stellar parallax
(J2015.5) (GAIA_PARALLAX)
1996-2004 F9.4 mas e_Plx [0/1415]?=-1 Plx uncertainty
(GAIAPARALLAXERR)
2006-2012 F7.3 mas/yr pmRA [-42/38.3] Gaia proper motion in RA
(J2015.5) (GAIAPMRA)
2014-2020 F7.3 mas/yr e_pmRA [0/763]?=-1 pmRA uncertainty (GAIAPMRA_ERR)
2022-2028 F7.3 mas/yr pmDE [-40.1/43.3] Gaia proper motion in DEC
(J2015.5) (GAIAPMDEC)
2030-2036 F7.3 mas/yr e_pmDE [0/725]?=-1 pmDE uncertainty
(GAIAPMDEC_ERR)
2038-2044 F7.4 mag Gmag [14.6/22]?=-1 Gaia mean magnitude in
the G band (Vega) (GAIAGMAG)
2046-2054 F9.4 --- SNG [5/1805]?=-1 Mean flux over the standard
deviation in the (Vega) G band
(GAIAGFLUX_SNR)
2056-2062 F7.4 mag BPmag [0/23.6]?=-1 Gaia mean magnitude in
the (Vega) BP band (GAIABPMAG)
2064-2072 F9.4 --- SNBP [0/9423]?=-1 Mean flux over the standard
deviation in the (Vega) BP band
(GAIABPFLUX_SNR)
2074-2080 F7.4 mag RPmag [0/23.2]?=-1 Gaia mean magnitude in
the (Vega) RP band (GAIARPMAG)
2082-2091 F10.4 --- SNRP [0/39131]?=-1 Mean flux over the standard
deviation in the (Vega) RP band
(GAIARPFLUX_SNR)
2093-2099 F7.4 arcsec SepG [0.0001/0.5]?=-1 SDSS-Gaia separation
(SDSS2GAIA_SEP)
--------------------------------------------------------------------------------
Note (1): "AUTOCLASS_PQN" automated classification as outlined in Section 3.2.
Values as follows:
STAR = if best model fit for the spectrum is STAR (561 occurrences);
GALAXY = if the best model fit for the spectrum is GALAXY and Zpipe<1 or
if the best model fit for the spectrum is GALAXY, Zpipe≥1, and
at least one other fit is GALAXY (576 occurrences);
QSO = if the best model fit for the spectrum is QSO, fewer than two
other model fits are STAR, and ZWARNING=0 (653866 occurrences);
VI = selected for visual inspection (18758 occurrences);
UNK = 76653 occurrences.
A classification of "UNK" corresponds to objects that were added to the
superset catalog after the initial automated classification was
completed. All of these records were taken from a catalog of visually
inspected objects that did not have a targeting bit that appears in
Table 1.
Note (2): The visually identified classification for the object.
Definitions for the numeric values appear in Table 2 as follows:
0 = not inspected (428782 occurrences),
1 = star (347 occurrences),
3 = Quasar (290068 occurrences),
4 = Galaxy (37 occurrences),
30 = BAL quasar (31170 occurrences),
50 = possible blazar (10 occurrences).
Objects appearing in DR16Q that have values of 1 (Star) or 4 (Galaxy)
have low Z_CONF values. In these cases, the automated pipeline
classification was used to determine whether the object was a quasar.
Note (3): Source for the best available redshift as follows:
PIPE = Redshift from SDSS pipeline in this catalog
("Z_PIPE"; 356530 occurrences)
VI = Redshift from visual inspection in this catalog
(col. zvis: "z_VI"; 319596 occurrences)
DR6Q_HW = from SDSS-DR6 Hewett & Wild (2010, J/MNRAS/405/2302) cat.
(col. zDR6Q: "ZDR6QHW"; 63143 occurrences)
DR7QV_SCH = from SDSS DR7Q (Cat. VII/260)
(col. zDR7Q: "ZDR7QSCH"; 11127 occurrences)
DR12QV = SDSS DR12Q (Cat. VII/279) redshifts from the visual inspection
(18 occurrences)
Note (4): K corrections were normalized to a redshift of 2, using Table 4 of
Richards+ (2006, J/AJ/131/2766). The following cosmological parameters
were used: H0=67.6km/s/Mpc, {Omgea}M=0.31, and {Omgea}Λ=0.69.
Note (5): A source with a measured magnitude of 22.5 in the Vega system would
have a flux of 1 nanomaggy; see Lang+ (2016AJ....151...36L 2016AJ....151...36L).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr16qdup.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS-DR16 designation
(HHMMSS.ss+DDMMSS.s; J2000)
20- 29 F10.6 deg RAdeg [0.0018/360] Right Ascension (J2000)
31- 40 F10.6 deg DEdeg [-10.98/68.55] Declination (J2000)
42- 46 I5 --- Plate [3586/11704] Primary spectroscopic plate number
48- 52 I5 --- MJD [55176/58543] Primary spectroscopic MJD
54- 57 I4 --- Fiber [1/1000] Primary spectroscopic fiber number
59- 63 I5 --- Plate1 [266/11704] Plate for 1st duplicate observation
65- 69 I5 --- Plate2 [-1/11704] Plate for 2nd duplicate observation
71- 75 I5 --- Plate3 [-1/11678] Plate for 3rd duplicate observation
77- 81 I5 --- Plate4 [-1/11652] Plate for 4th duplicate observation
83- 87 I5 --- Plate5 [-1/10000] Plate for 5th duplicate observation
89- 93 I5 --- Plate6 [-1/10655] Plate for 6th duplicate observation
95- 99 I5 --- Plate7 [-1/10000] Plate for 7th duplicate observation
101-105 I5 --- Plate8 [-1/10000] Plate for 8th duplicate observation
107-111 I5 --- Plate9 [-1/10000] Plate for 9th duplicate observation
113-117 I5 --- Plate10 [-1/10000] Plate for 10th duplicate observation
119-122 I4 --- Plate11 [-1/7828] Plate for 11th duplicate observation
124-127 I4 --- Plate12 [-1/9382] Plate for 12th duplicate observation
129-132 I4 --- Plate13 [-1/9381] Plate for 13th duplicate observation
134-137 I4 --- Plate14 [-1/9373] Plate for 14th duplicate observation
139-142 I4 --- Plate15 [-1/9381] Plate for 15th duplicate observation
144-147 I4 --- Plate16 [-1/7824] Plate for 16th duplicate observation
149-152 I4 --- Plate17 [-1/9373] Plate for 17th duplicate observation
154-157 I4 --- Plate18 [-1/7340] Plate for 18th duplicate observation
159-162 I4 --- Plate19 [-1/9376] Plate for 19th duplicate observation
164-167 I4 --- Plate20 [-1/8428] Plate for 20th duplicate observation
169-172 I4 --- Plate21 [-1/8402] Plate for 21th duplicate observation
174-177 I4 --- Plate22 [-1/8405] Plate for 22th duplicate observation
179-182 I4 --- Plate23 [-1/7340] Plate for 23th duplicate observation
184-187 I4 --- Plate24 [-1/7340] Plate for 24th duplicate observation
189-192 I4 --- Plate25 [-1/7340] Plate for 25th duplicate observation
194-197 I4 --- Plate26 [-1/7340] Plate for 26th duplicate observation
199-202 I4 --- Plate27 [-1/7340] Plate for 27th duplicate observation
204-207 I4 --- Plate28 [-1/7340] Plate for 28th duplicate observation
209-212 I4 --- Plate29 [-1/7340] Plate for 29th duplicate observation
214-217 I4 --- Plate30 [-1/7340] Plate for 30th duplicate observation
219-222 I4 --- Plate31 [-1/7340] Plate for 31th duplicate observation
224-227 I4 --- Plate32 [-1/7340] Plate for 32th duplicate observation
229-232 I4 --- Plate33 [-1/7340] Plate for 33th duplicate observation
234-237 I4 --- Plate34 [-1/7340] Plate for 34th duplicate observation
239-242 I4 --- Plate35 [-1/7340] Plate for 35th duplicate observation
244-247 I4 --- Plate36 [-1/7340] Plate for 36th duplicate observation
249-252 I4 --- Plate37 [-1/7340] Plate for 37th duplicate observation
254-257 I4 --- Plate38 [-1/7340] Plate for 38th duplicate observation
259-262 I4 --- Plate39 [-1/7340] Plate for 39th duplicate observation
264-267 I4 --- Plate40 [-1/8405] Plate for 40th duplicate observation
269-272 I4 --- Plate41 [-1/8428] Plate for 41th duplicate observation
274-277 I4 --- Plate42 [-1/7340] Plate for 42th duplicate observation
279-282 I4 --- Plate43 [-1/7340] Plate for 43th duplicate observation
284-287 I4 --- Plate44 [-1/7340] Plate for 44th duplicate observation
289-292 I4 --- Plate45 [-1/7340] Plate for 45th duplicate observation
294-297 I4 --- Plate46 [-1/7340] Plate for 46th duplicate observation
299-302 I4 --- Plate47 [-1/7340] Plate for 47th duplicate observation
304-307 I4 --- Plate48 [-1/7340] Plate for 48th duplicate observation
309-312 I4 --- Plate49 [-1/8428] Plate for 49th duplicate observation
314-317 I4 --- Plate50 [-1/7340] Plate for 50th duplicate observation
319-322 I4 --- Plate51 [-1/7340] Plate for 51th duplicate observation
324-327 I4 --- Plate52 [-1/7340] Plate for 52th duplicate observation
329-332 I4 --- Plate53 [-1/7340] Plate for 53th duplicate observation
334-337 I4 --- Plate54 [-1/7340] Plate for 54th duplicate observation
339-342 I4 --- Plate55 [-1/7340] Plate for 55th duplicate observation
344-347 I4 --- Plate56 [-1/7340] Plate for 56th duplicate observation
349-352 I4 --- Plate57 [-1/7340] Plate for 57th duplicate observation
354-357 I4 --- Plate58 [-1/7340] Plate for 58th duplicate observation
359-362 I4 --- Plate59 [-1/7340] Plate for 59th duplicate observation
364-367 I4 --- Plate60 [-1/7340] Plate for 60th duplicate observation
369-372 I4 --- Plate61 [-1/7340] Plate for 61th duplicate observation
374-377 I4 --- Plate62 [-1/7340] Plate for 62th duplicate observation
379-382 I4 --- Plate63 [-1/7340] Plate for 63th duplicate observation
384-387 I4 --- Plate64 [-1/7340] Plate for 64th duplicate observation
389-392 I4 --- Plate65 [-1/8405] Plate for 65th duplicate observation
394-397 I4 --- Plate66 [-1/7340] Plate for 66th duplicate observation
399-402 I4 --- Plate67 [-1/7340] Plate for 67th duplicate observation
404-407 I4 --- Plate68 [-1/7340] Plate for 68th duplicate observation
409-412 I4 --- Plate69 [-1/8428] Plate for 69th duplicate observation
414-417 I4 --- Plate70 [-1/8402] Plate for 70th duplicate observation
419-422 I4 --- Plate71 [-1/7340] Plate for 71th duplicate observation
424-427 I4 --- Plate72 [-1/7340] Plate for 72th duplicate observation
429-432 I4 --- Plate73 [-1/7339] Plate for 73th duplicate observation
434-435 I2 --- Plate74 [-1/-1] Plate for 74th duplicate observation
437-441 I5 d MJD1 [51609/58543] MJD for 1st duplicate observation
443-447 I5 d MJD2 [-1/58543] MJD for 2nd duplicate observation
449-453 I5 d MJD3 [-1/58523] MJD for 3rd duplicate observation
455-459 I5 d MJD4 [-1/58514] MJD for 4th duplicate observation
461-465 I5 d MJD5 [-1/58514] MJD for 5th duplicate observation
467-471 I5 d MJD6 [-1/58514] MJD for 6th duplicate observation
473-477 I5 d MJD7 [-1/58514] MJD for 7th duplicate observation
479-483 I5 d MJD8 [-1/58514] MJD for 8th duplicate observation
485-489 I5 d MJD9 [-1/58514] MJD for 9th duplicate observation
491-495 I5 d MJD10 [-1/58487] MJD for 10th duplicate observation
497-501 I5 d MJD11 [-1/58289] MJD for 11th duplicate observation
503-507 I5 d MJD12 [-1/58289] MJD for 12th duplicate observation
509-513 I5 d MJD13 [-1/58289] MJD for 13th duplicate observation
515-519 I5 d MJD14 [-1/58289] MJD for 14th duplicate observation
521-525 I5 d MJD15 [-1/58289] MJD for 15th duplicate observation
527-531 I5 d MJD16 [-1/58289] MJD for 16th duplicate observation
533-537 I5 d MJD17 [-1/58289] MJD for 17th duplicate observation
539-543 I5 d MJD18 [-1/58289] MJD for 18th duplicate observation
545-549 I5 d MJD19 [-1/58289] MJD for 19th duplicate observation
551-555 I5 d MJD20 [-1/58289] MJD for 20th duplicate observation
557-561 I5 d MJD21 [-1/58289] MJD for 21th duplicate observation
563-567 I5 d MJD22 [-1/58289] MJD for 22th duplicate observation
569-573 I5 d MJD23 [-1/58289] MJD for 23th duplicate observation
575-579 I5 d MJD24 [-1/58289] MJD for 24th duplicate observation
581-585 I5 d MJD25 [-1/58289] MJD for 25th duplicate observation
587-591 I5 d MJD26 [-1/58289] MJD for 26th duplicate observation
593-597 I5 d MJD27 [-1/58289] MJD for 27th duplicate observation
599-603 I5 d MJD28 [-1/58289] MJD for 28th duplicate observation
605-609 I5 d MJD29 [-1/58289] MJD for 29th duplicate observation
611-615 I5 d MJD30 [-1/58289] MJD for 30th duplicate observation
617-621 I5 d MJD31 [-1/58289] MJD for 31th duplicate observation
623-627 I5 d MJD32 [-1/58289] MJD for 32th duplicate observation
629-633 I5 d MJD33 [-1/58289] MJD for 33th duplicate observation
635-639 I5 d MJD34 [-1/58289] MJD for 34th duplicate observation
641-645 I5 d MJD35 [-1/58289] MJD for 35th duplicate observation
647-651 I5 d MJD36 [-1/58289] MJD for 36th duplicate observation
653-657 I5 d MJD37 [-1/58289] MJD for 37th duplicate observation
659-663 I5 d MJD38 [-1/58289] MJD for 38th duplicate observation
665-669 I5 d MJD39 [-1/58289] MJD for 39th duplicate observation
671-675 I5 d MJD40 [-1/58289] MJD for 40th duplicate observation
677-681 I5 d MJD41 [-1/58289] MJD for 41th duplicate observation
683-687 I5 d MJD42 [-1/58289] MJD for 42th duplicate observation
689-693 I5 d MJD43 [-1/58289] MJD for 43th duplicate observation
695-699 I5 d MJD44 [-1/58289] MJD for 44th duplicate observation
701-705 I5 d MJD45 [-1/58289] MJD for 45th duplicate observation
707-711 I5 d MJD46 [-1/58289] MJD for 46th duplicate observation
713-717 I5 d MJD47 [-1/58289] MJD for 47th duplicate observation
719-723 I5 d MJD48 [-1/58289] MJD for 48th duplicate observation
725-729 I5 d MJD49 [-1/58289] MJD for 49th duplicate observation
731-735 I5 d MJD50 [-1/58289] MJD for 50th duplicate observation
737-741 I5 d MJD51 [-1/58289] MJD for 51th duplicate observation
743-747 I5 d MJD52 [-1/58289] MJD for 52th duplicate observation
749-753 I5 d MJD53 [-1/58289] MJD for 53th duplicate observation
755-759 I5 d MJD54 [-1/58289] MJD for 54th duplicate observation
761-765 I5 d MJD55 [-1/58289] MJD for 55th duplicate observation
767-771 I5 d MJD56 [-1/58289] MJD for 56th duplicate observation
773-777 I5 d MJD57 [-1/58289] MJD for 57th duplicate observation
779-783 I5 d MJD58 [-1/58289] MJD for 58th duplicate observation
785-789 I5 d MJD59 [-1/58289] MJD for 59th duplicate observation
791-795 I5 d MJD60 [-1/58289] MJD for 60th duplicate observation
797-801 I5 d MJD61 [-1/58289] MJD for 61th duplicate observation
803-807 I5 d MJD62 [-1/58289] MJD for 62th duplicate observation
809-813 I5 d MJD63 [-1/58289] MJD for 63th duplicate observation
815-819 I5 d MJD64 [-1/58289] MJD for 64th duplicate observation
821-825 I5 d MJD65 [-1/58289] MJD for 65th duplicate observation
827-831 I5 d MJD66 [-1/58289] MJD for 66th duplicate observation
833-837 I5 d MJD67 [-1/58289] MJD for 67th duplicate observation
839-843 I5 d MJD68 [-1/58289] MJD for 68th duplicate observation
845-849 I5 d MJD69 [-1/58289] MJD for 69th duplicate observation
851-855 I5 d MJD70 [-1/58289] MJD for 70th duplicate observation
857-861 I5 d MJD71 [-1/58289] MJD for 71th duplicate observation
863-867 I5 d MJD72 [-1/58289] MJD for 72th duplicate observation
869-873 I5 d MJD73 [-1/57082] MJD for 73th duplicate observation
875-876 I2 d MJD74 [-1/0] MJD for 74th duplicate observation
878-881 I4 --- Fiber1 [0/1000] Fiber for 1st observation
883-886 I4 --- Fiber2 [-1/1000] Fiber for 2nd duplicate observation
888-891 I4 --- Fiber3 [-1/1000] Fiber for 3rd duplicate observation
893-896 I4 --- Fiber4 [-1/1000] Fiber for 4th duplicate observation
898-901 I4 --- Fiber5 [-1/1000] Fiber for 5th duplicate observation
903-906 I4 --- Fiber6 [-1/1000] Fiber for 6th duplicate observation
908-911 I4 --- Fiber7 [-1/1000] Fiber for 7th duplicate observation
913-915 I3 --- Fiber8 [-1/999] Fiber for 8th duplicate observation
917-919 I3 --- Fiber9 [-1/999] Fiber for 9th duplicate observation
921-923 I3 --- Fiber10 [-1/999] Fiber for 10th duplicate observation
925-927 I3 --- Fiber11 [-1/998] Fiber for 11th duplicate observation
929-932 I4 --- Fiber12 [-1/1000] Fiber for 12th duplicate observation
934-937 I4 --- Fiber13 [-1/1000] Fiber for 13th duplicate observation
939-942 I4 --- Fiber14 [-1/1000] Fiber for 14th duplicate observation
944-947 I4 --- Fiber15 [-1/1000] Fiber for 15th duplicate observation
949-952 I4 --- Fiber16 [-1/1000] Fiber for 16th duplicate observation
954-957 I4 --- Fiber17 [-1/1000] Fiber for 17th duplicate observation
959-961 I3 --- Fiber18 [-1/999] Fiber for 18th duplicate observation
963-966 I4 --- Fiber19 [-1/1000] Fiber for 19th duplicate observation
968-970 I3 --- Fiber20 [-1/998] Fiber for 20th duplicate observation
972-975 I4 --- Fiber21 [-1/1000] Fiber for 21th duplicate observation
977-979 I3 --- Fiber22 [-1/999] Fiber for 22th duplicate observation
981-984 I4 --- Fiber23 [-1/1000] Fiber for 23th duplicate observation
986-989 I4 --- Fiber24 [-1/1000] Fiber for 24th duplicate observation
991-993 I3 --- Fiber25 [-1/996] Fiber for 25th duplicate observation
995-997 I3 --- Fiber26 [-1/999] Fiber for 26th duplicate observation
999-1002 I4 --- Fiber27 [-1/1000] Fiber for 27th duplicate observation
1004-1007 I4 --- Fiber28 [-1/1000] Fiber for 28th duplicate observation
1009-1012 I4 --- Fiber29 [-1/1000] Fiber for 29th duplicate observation
1014-1016 I3 --- Fiber30 [-1/999] Fiber for 30th duplicate observation
1018-1021 I4 --- Fiber31 [-1/1000] Fiber for 31th duplicate observation
1023-1026 I4 --- Fiber32 [-1/1000] Fiber for 32th duplicate observation
1028-1031 I4 --- Fiber33 [-1/1000] Fiber for 33th duplicate observation
1033-1035 I3 --- Fiber34 [-1/999] Fiber for 34th duplicate observation
1037-1040 I4 --- Fiber35 [-1/1000] Fiber for 35th duplicate observation
1042-1044 I3 --- Fiber36 [-1/999] Fiber for 36th duplicate observation
1046-1048 I3 --- Fiber37 [-1/999] Fiber for 37th duplicate observation
1050-1052 I3 --- Fiber38 [-1/999] Fiber for 38th duplicate observation
1054-1056 I3 --- Fiber39 [-1/998] Fiber for 39th duplicate observation
1058-1061 I4 --- Fiber40 [-1/1000] Fiber for 40th duplicate observation
1063-1065 I3 --- Fiber41 [-1/999] Fiber for 41th duplicate observation
1067-1070 I4 --- Fiber42 [-1/1000] Fiber for 42th duplicate observation
1072-1075 I4 --- Fiber43 [-1/1000] Fiber for 43th duplicate observation
1077-1079 I3 --- Fiber44 [-1/999] Fiber for 44th duplicate observation
1081-1084 I4 --- Fiber45 [-1/1000] Fiber for 45th duplicate observation
1086-1089 I4 --- Fiber46 [-1/1000] Fiber for 46th duplicate observation
1091-1093 I3 --- Fiber47 [-1/997] Fiber for 47th duplicate observation
1095-1098 I4 --- Fiber48 [-1/1000] Fiber for 48th duplicate observation
1100-1103 I4 --- Fiber49 [-1/1000] Fiber for 49th duplicate observation
1105-1108 I4 --- Fiber50 [-1/1000] Fiber for 50th duplicate observation
1110-1113 I4 --- Fiber51 [-1/1000] Fiber for 51th duplicate observation
1115-1117 I3 --- Fiber52 [-1/999] Fiber for 52th duplicate observation
1119-1121 I3 --- Fiber53 [-1/999] Fiber for 53th duplicate observation
1123-1125 I3 --- Fiber54 [-1/999] Fiber for 54th duplicate observation
1127-1130 I4 --- Fiber55 [-1/1000] Fiber for 55th duplicate observation
1132-1135 I4 --- Fiber56 [-1/1000] Fiber for 56th duplicate observation
1137-1139 I3 --- Fiber57 [-1/999] Fiber for 57th duplicate observation
1141-1144 I4 --- Fiber58 [-1/1000] Fiber for 58th duplicate observation
1146-1149 I4 --- Fiber59 [-1/1000] Fiber for 59th duplicate observation
1151-1154 I4 --- Fiber60 [-1/1000] Fiber for 60th duplicate observation
1156-1158 I3 --- Fiber61 [-1/999] Fiber for 61th duplicate observation
1160-1163 I4 --- Fiber62 [-1/1000] Fiber for 62th duplicate observation
1165-1167 I3 --- Fiber63 [-1/999] Fiber for 63th duplicate observation
1169-1171 I3 --- Fiber64 [-1/999] Fiber for 64th duplicate observation
1173-1176 I4 --- Fiber65 [-1/1000] Fiber for 65th duplicate observation
1178-1181 I4 --- Fiber66 [-1/1000] Fiber for 66th duplicate observation
1183-1185 I3 --- Fiber67 [-1/997] Fiber for 67th duplicate observation
1187-1190 I4 --- Fiber68 [-1/1000] Fiber for 68th duplicate observation
1192-1195 I4 --- Fiber69 [-1/1000] Fiber for 69th duplicate observation
1197-1199 I3 --- Fiber70 [-1/999] Fiber for 70th duplicate observation
1201-1204 I4 --- Fiber71 [-1/1000] Fiber for 71th duplicate observation
1206-1208 I3 --- Fiber72 [-1/900] Fiber for 72th duplicate observation
1210-1212 I3 --- Fiber73 [-1/728] Fiber for 73th duplicate observation
1214-1215 I2 --- Fiber74 [-1/0] Fiber for 74th duplicate observation
1217 I1 --- Inst1 [0/2] Instrument for 1st duplicate
observation (1=SDSS; 2= (e)BOSS)
1219-1220 I2 --- Inst2 [-1/2] Instrument for 2nd duplicate
observation (1=SDSS; 2= (e)BOSS)
1222-1223 I2 --- Inst3 [-1/2] Instrument for 3rd duplicate
observation (1=SDSS; 2= (e)BOSS)
1225-1226 I2 --- Inst4 [-1/2] Instrument for 4th duplicate
observation (1=SDSS; 2= (e)BOSS)
1228-1229 I2 --- Inst5 [-1/2] Instrument for 5th duplicate
observation (1=SDSS; 2= (e)BOSS)
1231-1232 I2 --- Inst6 [-1/2] Instrument for 6th duplicate
observation (1=SDSS; 2= (e)BOSS)
1234-1235 I2 --- Inst7 [-1/2] Instrument for 7th duplicate
observation (1=SDSS; 2= (e)BOSS)
1237-1238 I2 --- Inst8 [-1/2] Instrument for 8th duplicate
observation (1=SDSS; 2= (e)BOSS)
1240-1241 I2 --- Inst9 [-1/2] Instrument for 9th duplicate
observation (1=SDSS; 2= (e)BOSS)
1243-1244 I2 --- Inst10 [-1/2] Instrument for 10th duplicate
observation (1=SDSS; 2= (e)BOSS)
1246-1247 I2 --- Inst11 [-1/2] Instrument for 11th duplicate
observation (1=SDSS; 2= (e)BOSS)
1249-1250 I2 --- Inst12 [-1/2] Instrument for 12th duplicate
observation (1=SDSS; 2= (e)BOSS)
1252-1253 I2 --- Inst13 [-1/2] Instrument for 13th duplicate
observation (1=SDSS; 2= (e)BOSS)
1255-1256 I2 --- Inst14 [-1/2] Instrument for 14th duplicate
observation (1=SDSS; 2= (e)BOSS)
1258-1259 I2 --- Inst15 [-1/2] Instrument for 15th duplicate
observation (1=SDSS; 2= (e)BOSS)
1261-1262 I2 --- Inst16 [-1/2] Instrument for 16th duplicate
observation (1=SDSS; 2= (e)BOSS)
1264-1265 I2 --- Inst17 [-1/2] Instrument for 17th duplicate
observation (1=SDSS; 2= (e)BOSS)
1267-1268 I2 --- Inst18 [-1/2] Instrument for 18th duplicate
observation (1=SDSS; 2= (e)BOSS)
1270-1271 I2 --- Inst19 [-1/2] Instrument for 19th duplicate
observation (1=SDSS; 2= (e)BOSS)
1273-1274 I2 --- Inst20 [-1/2] Instrument for 20th duplicate
observation (1=SDSS; 2= (e)BOSS)
1276-1277 I2 --- Inst21 [-1/2] Instrument for 21th duplicate
observation (1=SDSS; 2= (e)BOSS)
1279-1280 I2 --- Inst22 [-1/2] Instrument for 22th duplicate
observation (1=SDSS; 2= (e)BOSS)
1282-1283 I2 --- Inst23 [-1/2] Instrument for 23th duplicate
observation (1=SDSS; 2= (e)BOSS)
1285-1286 I2 --- Inst24 [-1/2] Instrument for 24th duplicate
observation (1=SDSS; 2= (e)BOSS)
1288-1289 I2 --- Inst25 [-1/2] Instrument for 25th duplicate
observation (1=SDSS; 2= (e)BOSS)
1291-1292 I2 --- Inst26 [-1/2] Instrument for 26th duplicate
observation (1=SDSS; 2= (e)BOSS)
1294-1295 I2 --- Inst27 [-1/2] Instrument for 27th duplicate
observation (1=SDSS; 2= (e)BOSS)
1297-1298 I2 --- Inst28 [-1/2] Instrument for 28th duplicate
observation (1=SDSS; 2= (e)BOSS)
1300-1301 I2 --- Inst29 [-1/2] Instrument for 29th duplicate
observation (1=SDSS; 2= (e)BOSS)
1303-1304 I2 --- Inst30 [-1/2] Instrument for 30th duplicate
observation (1=SDSS; 2= (e)BOSS)
1306-1307 I2 --- Inst31 [-1/2] Instrument for 31th duplicate
observation (1=SDSS; 2= (e)BOSS)
1309-1310 I2 --- Inst32 [-1/2] Instrument for 32th duplicate
observation (1=SDSS; 2= (e)BOSS)
1312-1313 I2 --- Inst33 [-1/2] Instrument for 33th duplicate
observation (1=SDSS; 2= (e)BOSS)
1315-1316 I2 --- Inst34 [-1/2] Instrument for 34th duplicate
observation (1=SDSS; 2= (e)BOSS)
1318-1319 I2 --- Inst35 [-1/2] Instrument for 35th duplicate
observation (1=SDSS; 2= (e)BOSS)
1321-1322 I2 --- Inst36 [-1/2] Instrument for 36th duplicate
observation (1=SDSS; 2= (e)BOSS)
1324-1325 I2 --- Inst37 [-1/2] Instrument for 37th duplicate
observation (1=SDSS; 2= (e)BOSS)
1327-1328 I2 --- Inst38 [-1/2] Instrument for 38th duplicate
observation (1=SDSS; 2= (e)BOSS)
1330-1331 I2 --- Inst39 [-1/2] Instrument for 39th duplicate
observation (1=SDSS; 2= (e)BOSS)
1333-1334 I2 --- Inst40 [-1/2] Instrument for 40th duplicate
observation (1=SDSS; 2= (e)BOSS)
1336-1337 I2 --- Inst41 [-1/2] Instrument for 41th duplicate
observation (1=SDSS; 2= (e)BOSS)
1339-1340 I2 --- Inst42 [-1/2] Instrument for 42th duplicate
observation (1=SDSS; 2= (e)BOSS)
1342-1343 I2 --- Inst43 [-1/2] Instrument for 43th duplicate
observation (1=SDSS; 2= (e)BOSS)
1345-1346 I2 --- Inst44 [-1/2] Instrument for 44th duplicate
observation (1=SDSS; 2= (e)BOSS)
1348-1349 I2 --- Inst45 [-1/2] Instrument for 45th duplicate
observation (1=SDSS; 2= (e)BOSS)
1351-1352 I2 --- Inst46 [-1/2] Instrument for 46th duplicate
observation (1=SDSS; 2= (e)BOSS)
1354-1355 I2 --- Inst47 [-1/2] Instrument for 47th duplicate
observation (1=SDSS; 2= (e)BOSS)
1357-1358 I2 --- Inst48 [-1/2] Instrument for 48th duplicate
observation (1=SDSS; 2= (e)BOSS)
1360-1361 I2 --- Inst49 [-1/2] Instrument for 49th duplicate
observation (1=SDSS; 2= (e)BOSS)
1363-1364 I2 --- Inst50 [-1/2] Instrument for 50th duplicate
observation (1=SDSS; 2= (e)BOSS)
1366-1367 I2 --- Inst51 [-1/2] Instrument for 51th duplicate
observation (1=SDSS; 2= (e)BOSS)
1369-1370 I2 --- Inst52 [-1/2] Instrument for 52th duplicate
observation (1=SDSS; 2= (e)BOSS)
1372-1373 I2 --- Inst53 [-1/2] Instrument for 53th duplicate
observation (1=SDSS; 2= (e)BOSS)
1375-1376 I2 --- Inst54 [-1/2] Instrument for 54th duplicate
observation (1=SDSS; 2= (e)BOSS)
1378-1379 I2 --- Inst55 [-1/2] Instrument for 55th duplicate
observation (1=SDSS; 2= (e)BOSS)
1381-1382 I2 --- Inst56 [-1/2] Instrument for 56th duplicate
observation (1=SDSS; 2= (e)BOSS)
1384-1385 I2 --- Inst57 [-1/2] Instrument for 57th duplicate
observation (1=SDSS; 2= (e)BOSS)
1387-1388 I2 --- Inst58 [-1/2] Instrument for 58th duplicate
observation (1=SDSS; 2= (e)BOSS)
1390-1391 I2 --- Inst59 [-1/2] Instrument for 59th duplicate
observation (1=SDSS; 2= (e)BOSS)
1393-1394 I2 --- Inst60 [-1/2] Instrument for 60th duplicate
observation (1=SDSS; 2= (e)BOSS)
1396-1397 I2 --- Inst61 [-1/2] Instrument for 61th duplicate
observation (1=SDSS; 2= (e)BOSS)
1399-1400 I2 --- Inst62 [-1/2] Instrument for 62th duplicate
observation (1=SDSS; 2= (e)BOSS)
1402-1403 I2 --- Inst63 [-1/2] Instrument for 63th duplicate
observation (1=SDSS; 2= (e)BOSS)
1405-1406 I2 --- Inst64 [-1/2] Instrument for 64th duplicate
observation (1=SDSS; 2= (e)BOSS)
1408-1409 I2 --- Inst65 [-1/2] Instrument for 65th duplicate
observation (1=SDSS; 2= (e)BOSS)
1411-1412 I2 --- Inst66 [-1/2] Instrument for 66th duplicate
observation (1=SDSS; 2= (e)BOSS)
1414-1415 I2 --- Inst67 [-1/2] Instrument for 67th duplicate
observation (1=SDSS; 2= (e)BOSS)
1417-1418 I2 --- Inst68 [-1/2] Instrument for 68th duplicate
observation (1=SDSS; 2= (e)BOSS)
1420-1421 I2 --- Inst69 [-1/2] Instrument for 69th duplicate
observation (1=SDSS; 2= (e)BOSS)
1423-1424 I2 --- Inst70 [-1/2] Instrument for 70th duplicate
observation (1=SDSS; 2= (e)BOSS)
1426-1427 I2 --- Inst71 [-1/2] Instrument for 71th duplicate
observation (1=SDSS; 2= (e)BOSS)
1429-1430 I2 --- Inst72 [-1/2] Instrument for 72th duplicate
observation (1=SDSS; 2= (e)BOSS)
1432-1433 I2 --- Inst73 [-1/2] Instrument for 73th duplicate
observation (1=SDSS; 2= (e)BOSS)
1435-1436 I2 --- Inst74 [-1/0] Instrument for 74th duplicate
observation (1=SDSS; 2= (e)BOSS)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: superset.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS-DR16 designation
(HHMMSS.ss+DDMMSS.s; J2000) (SDSS_NAME)
20- 29 F10.6 deg RAdeg Right Ascension (J2000) (RA)
31- 40 F10.6 deg DEdeg [-17.53/84.44] Declination (J2000) (DEC)
42- 46 I5 --- Plate Spectroscopic plate number (G1)
48- 52 I5 --- MJD [51608/58543] Spectroscopic Modified
Julian Date (G1)
54- 57 I4 --- Fiber Spectroscopic fiber number (FIBERID) (G1)
--------------------------------------------------------------------------------
59- 64 A6 --- QN Object classification post-QuasarNET (Busca
& Balland 2018arXiv180809955B 2018arXiv180809955B)
(AUTOCLASS_PQN) (1)
66- 71 A6 --- DR14Q Object classification based only on the DR14Q
algorithm (AUTOCLASS_DR14Q)
73- 74 I2 --- QQN Binary flag for QuasarNET quasar
identification (1=QSO;
-1=not processed by QuasarNET) (ISQSOQN)
76- 84 F9.6 --- zQN [-0.46/7.26]?=-1 Redshift derived
by QuasarNET (Z_QN)
--------------------------------------------------------------------------------
86 I1 --- 10K [0/1] Binary flag indicating objects selected
for random visual inspection
(0=not selected) (RANDOM_SELECT) (G2)
88- 98 F11.6 --- z10K [-0.0075/5.01]?=-1 Redshift from visual
inspection of random set (Z_10K)
100-101 I2 --- f_z10K [-1/3]? Confidence rating for visual
inspection redshift of random set (3:highest
confidence) (ZCONF10K) (G3)
103-104 I2 --- C10K Binary flag indicating if the automated
pipeline classification and redshift were
correct in the random set
(PIPECORR10K) (G4)
106-107 I2 --- Q10K Binary flag for random set quasar
identification (1=QSO;
-1=not randomly selected) (ISQSO10K)
109 I1 --- Prim [0/1] Flag to indicate if observation is
primary observation appearing in DR16Q or a
duplicate (1=Primary) (PRIM_REC)
111-119 I9 --- THINGID ?=-1 SDSS identifier mainly for BOSS and eBOSS
objects (THING_ID)
--------------------------------------------------------------------------------
121-131 F11.6 --- zvis [0.001/7.02]?=-1 Redshift from visual
inspection (Z_VI)
133-134 I2 --- f_zvis [-1/3]? Confidence rating for visual
inspection redshift (3: highest confidence)
(Z_CONF)
136-137 I2 --- Class [0/50]? Object classification from visual
inspection (CLASS_PERSON) (2)
139-147 F9.6 --- zDR12Q [0.04/6.5]?=-1 Redshift taken from DR12Q
(Cat. VII/279) visual inspection (Z_DR12Q)
149-150 I2 --- QDR12Q Flag indicating if an object was a quasar
in DR12Q (1=QSO) (ISQSODR12Q)
152-158 F7.4 --- zDR7Q [0.06/5.47]?=-1 Redshift taken from DR7Q
(Cat. VII/260) catalog (ZDR7QSCH)
160-161 I2 --- QDR7Q Flag indicating if an object was a quasar
in DR7Q (ISQSODR7Q)
163-171 F9.6 --- zDR6Q [0.07/5.5]?=-1 Redshift taken from DR6
(Hewett & Wild, 2010, J/MNRAS/405/2302)
(ZDR6QHW)
173-181 F9.6 --- zDR7Qa [0.06/5.5]?=-1 Redshift taken from DR7
(Shen+ 2011, J/ApJS/194/45)
catalog ancillary columns (ZDR7QHW) (G5)
183-184 I2 --- QSO Flag indicating quasars included in
final catalog (1=QSO; 2=questionable
-- see Section 3.6) (ISQSOFINAL)
186-196 F11.6 --- z [-0.012/7.06]?=-1 Best available redshift
198-206 A9 --- r_z Source for redshift z (SOURCE_Z) (3)
208-216 F9.6 --- zPipe [-0.012/7.06]?=-1 Redshift from SDSS pipeline
version v5130 (Z_PIPE)
218-220 I3 --- q_zPipe [-1/68] Quality flag on SDSS pipeline redshift
estimate (ZWARNING) (G6)
222-240 A19 --- objID SDSS object identification number
(sky version, run, rerun, camera column,
field number, and ID) (G7)
--------------------------------------------------------------------------------
242-253 F12.6 --- zPCA [-1008/7.3] PCA redshift derived by the
redvsblue algorithm (Z_PCA)
255-258 I4 --- q_zPCA [0/1056] Warning flag for redvsblue
redshift (ZWARN_PCA) (G6)
260-270 E11.6 --- Chi2PCA [0.8/3e+7] Δχ2 for PCA redshift
versus cubic continuum fit (DELTACHI2_PCA)
272-280 F9.6 --- zHa [-0.023/0.53]?=-1 PCA line redshift for
Hα from redvsblue (Z_HALPHA)
282-285 I4 --- q_zHa [0/7682] Warning flag for Hα
(ZWARN_HALPHA) (G6)
287-297 E11.6 --- Chi2Ha [0/93997] Δχ2 for Hα line
redshift versus cubic continuum fit
(DELTACHI2_HALPHA)
299-307 F9.6 --- zHb [-0.027/1.1]?=-1 PCA line redshift for Hβ
from redvsblue (Z_HBETA)
309-312 I4 --- q_zHb [0/7682] Warning flag for Hβ
(ZWARN_HBETA) (G6)
314-324 E11.6 --- Chi2Hb [0/30848] Δχ2 for Hβ line
versus cubic continuum fit (DELTACHI2_HBETA)
326-334 F9.6 --- zMgII [0.28/2.6]?=-1 PCA line redshift for MgII
from redvsblue (Z_MGII)
336-339 I4 --- q_zMgII [0/7682] Warning flag for MgII
(ZWARN_MGII) (G6)
341-351 E11.6 --- Chi2MgII [0/177687] Δχ2 for MgII line
redshift versus cubic continuum fit
(DELTACHI2_MGII)
353-361 F9.6 --- zCIII [0.88/4.3]?=-1 PCA line redshift for CIII]
from redvsblue (Z_CIII)
363-366 I4 --- q_zCIII [0/7682] Warning flag for CIII]
(ZWARN_CIII) (G6)
368-378 E11.6 --- Chi2CIII [0/122713] Δχ2 for CIII] line
redshift versus cubic continuum fit
(DELTACHI2_CIII)
380-388 F9.6 --- zCIV [1.3/5.5]?=-1 PCA line redshift for CIV
from redvsblue (Z_CIV)
390-393 I4 --- q_zCIV [0/7682] Warning flag for CIV (ZWARN_CIV) (G6)
395-405 E11.6 --- Chi2CIV [0/3.1e+6] Δχ2 for CIV line
redshift versus cubic continuum fit
(DELTACHI2_CIV)
407-415 F9.6 --- zLyA [1.9/7.3]?=-1 PCA line redshift for Lyα
from redvsblue (Z_LYA)
417-420 I4 --- q_zLyA [0/7682] Warning flag for Lyα
(ZWARN_LYA) (G6)
422-432 E11.6 --- Chi2LyA [0/1.6e+6] Δχ2 for Lyα line
redshift versus cubic continuum fit
(DELTACHI2_LYA)
--------------------------------------------------------------------------------
434-442 F9.6 --- zDLA1 [1.9/6.2]?=-1 Redshift for damped Lyα
feature 1 (Z_DLA1)
444-452 F9.6 --- zDLA2 [2/5.2]?=-1 Redshift for damped Lyα
feature 2 (Z_DLA2)
454-462 F9.6 --- zDLA3 [2.1/4.9]?=-1 Redshift for damped Lyα
feature 3 (Z_DLA3)
464-472 F9.6 --- zDLA4 [2.4/3.7]?=-1 Redshift for damped Lyα
feature 4 (Z_DLA4)
474-482 F9.6 --- zDLA5 [2.8/3.3]?=-1 Redshift for damped Lyα
feature 5 (Z_DLA5)
484-492 F9.6 [-] NHIDLA1 [20.3/22]?=-1 Absorber column density for
damped Lyα feature 1 (NHI_DLA1)
494-502 F9.6 [-] NHIDLA2 [20.3/21.8]?=-1 Absorber column density for
damped Lyα feature 2 (NHI_DLA2)
504-512 F9.6 [-] NHIDLA3 [20.3/21.4]?=-1 Absorber column density for
damped Lyα feature 3 (NHI_DLA3)
514-522 F9.6 [-] NHIDLA4 [20.3/21.1]?=-1 Absorber column density for
damped Lyα feature 4 (NHI_DLA4)
524-532 F9.6 [-] NHIDLA5 [20.5/20.6]?=-1 Absorber column density for
damped Lyα feature 5 (NHI_DLA5)
534-540 F7.4 --- q_zDLA1 Confidence of detection for
damped Lyα feature 1 (CONF_DLA1)
542-548 F7.4 --- q_zDLA2 Confidence of detection for
damped Lyα features (CONF_DLA2)
550-556 F7.4 --- q_zDLA3 Confidence of detection for
damped Lyα features (CONF_DLA3)
558-564 F7.4 --- q_zDLA4 Confidence of detection for
damped Lyα features (CONF_DLA4)
566-572 F7.4 --- q_zDLA5 Confidence of detection for
damped Lyα features (CONF_DLA5)
574-582 F9.6 --- PBAL [-1/1] BAL probability (BAL_PROB) (G8)
584-595 F12.5 km/s BI(CIV) [/109061]?=-1 BALnicity index for
the CIV region (BI_CIV)
597-608 E12.6 km/s e_BI(CIV) [0/3.1e+38]?=- BI(CIV) uncertainty
(ERRBICIV)
610-621 F12.5 km/s AI(CIV) [-618/121609]?=-1 Absorption index for
the CIV region (AI_CIV)
623-634 E12.6 km/s e_AI(CIV) [0/10897]?=- AI(CIV) uncertainty (ERRAICIV)
636-646 F11.5 km/s BI(SIIV) [/85220]?=-1 BALnicity index for
the SiIV region (BI_SIIV)
648-659 E12.6 km/s e_BI(SIIV) [0/1985]?=- BI(SIIV) uncertainty (ERRBISIIV)
661-671 F11.5 km/s AI(SIIV) [/45671]?=-1 Absorption index for
the SiIV region (AI_SIIV)
673-684 E12.6 km/s e_AI(SIIV) [0/1622]?=-1 AI(SIIV) uncertainty (ERRAISIIV)
--------------------------------------------------------------------------------
686-699 I14 --- Btarg1 ?=-1 BOSS target selection flag for the
main survey (BOSS_TARGET1)
701-713 I13 --- eBOSST0 ?=-1 eBOSS target selection flag for the
pilot survey (SEQUELS) (EBOSS_TARGET0)
715-730 I16 --- eBOSST1 ?=-1 eBOSS target selection flag for the
main survey (EBOSS_TARGET1)
732-750 I19 --- eBOSST2 ?=-1 eBOSS target 2 selection flag for the
main survey (EBOSS_TARGET2)
752-771 I20 --- Atarg1 ?=-1 BOSS target selection flag for the
ancillary surveys (ANCILLARY_TARGET1)
773-791 I19 --- Atarg2 ?=-1 BOSS target 2 selection flag for the
ancillary surveys (ANCILLARY_TARGET2)
--------------------------------------------------------------------------------
793 I1 --- NspI [0/1] Number of additional spectra
from SDSS-I/II (NSPEC_SDSS) (G9)
795-796 I2 --- NspBOSS [0/73] Number of additional spectra
from BOSS/eBOSS (NSPEC_BOSS) (G9)
798-800 I3 --- Nsp [0/73]?=-1 Total number of additional
spectra (NSPEC) (G9)
801-1318 74I7 --- PlateDup Spectroscopic plate number of duplicate
spectroscopic observations (PLATE_DUPLICATE)
1319-1836 74I7 --- MJDDup Spectroscopic MJD of duplicate spectroscopic
observations (MJD_DUPLICATE)
1837-2280 74I6 --- FiberDup Fiber ID number of duplicate spectroscopic
observations (FIBERID_DUPLICATE)
2281-2502 74I3 --- SpDup Spectroscopic instrument for each duplicate,
1=SDSS, 2=(e)BOSS (SPECTRO_DUPLICATE)
--------------------------------------------------------------------------------
2504 I1 --- Sky [2]?=0 SDSS photometric sky version
number (SKYVERSION)
2506-2509 I4 --- Run [94/8162]?=0 SDSS imaging run number of
photometric measurements (RUN_NUMBER)
2511-2513 I3 --- Rerun [157/301]? SDSS photometric processing rerun
number (RERUN_NUMBER)
2515 I1 --- Cam [1/6]?=0 SDSS camera column
number (CAMCOL_NUMBER)
2517-2519 I3 --- Field [11/872]?=0 SDSS field number (FIELD_NUMBER)
2521-2524 I4 --- photID [2/4093]?=0 SDSS photometric ID (ID_NUMBER)
2526-2529 I4 0.1nm lambda [4000/7500] Wavelength for which the fiber
placement was optimized to account for
atmospheric differential refraction
(Dawson+ 2013AJ....145...10D 2013AJ....145...10D), in Å
(LAMBDA_EFF)
2531-2540 F10.6 um Offset [0/300] Backstopping offset distance (ZOFFSET)
2542-2552 F11.6 mm Xfocal [-325/325] Hole x-axis position in focal plane
2554-2564 F11.6 mm Yfocal [-326/326] Hole y-axis position in focal plane
2566-2579 A14 --- Chunk Name of tiling chunk (from the plate-list
product)
2581-2586 I6 --- Tile [-3/17691] Tile number
2588-2597 F10.6 --- SN2 [0/334] Overall (S/N)2 measure for plate,
minimum of all four cameras (PLATESN2)
--------------------------------------------------------------------------------
2599-2610 F12.6 3.63uJy Fu [-45/2001]?=- PSF flux in u-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXu)
2612-2623 F12.6 3.63uJy Fg [-8.5/4455]?=- PSF flux in g-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXg)
2625-2636 F12.6 3.63uJy Fr [-12/4398]?=- PSF flux in r-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXr)
2638-2649 F12.6 3.63uJy Fi [-31/3796]?=- PSF flux in i-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXi)
2651-2662 F12.6 3.63uJy Fz [-54/10794]?=- PSF flux in z-band in nMgy
(not corrected for Galactic extinction)
(PSFFLUXz)
2664-2675 F12.6 3.63uJy IVFu [0/245]?=- Inverse variance of Fu in nMgy
(PSFFLUX_IVARu)
2677-2688 F12.6 3.63uJy IVFg [0/762]?=- Inverse variance of Fg in nMgy
(PSFFLUX_IVARg)
2690-2701 F12.6 3.63uJy IVFr [0/262]?=- Inverse variance of Fr in nMgy
(PSFFLUX_IVARr)
2703-2714 F12.6 3.63uJy IVFi [0/129]?=- Inverse variance of Fi in nMgy
(PSFFLUX_IVARi)
2716-2727 F12.6 3.63uJy IVFz [0/14]?=- Inverse variance of Fz in nMgy
(PSFFLUX_IVARz)
2729-2738 F10.4 mag umag [14.2/30.9]?=- PSF (AB) magnitude in u band
(not corrected for Galactic extinction)
(PSFMAGu)
2740-2749 F10.4 mag gmag [13.3/30.1]?=- PSF (AB) magnitude in g band
(not corrected for Galactic extinction)
(PSFMAGg)
2751-2760 F10.4 mag rmag [13.3/29.8]?=- PSF (AB) magnitude in r band
(not corrected for Galactic extinction)
(PSFMAGr)
2762-2771 F10.4 mag imag [13.5/30]?=- PSF (AB) magnitude in i band
(not corrected for Galactic extinction)
(PSFMAGi)
2773-2782 F10.4 mag zmag [12.4/27.5]?=- PSF (AB) magnitude in z band
(not corrected for Galactic extinction)
(PSFMAGz)
2784-2795 E12.6 mag e_umag [0.007/4.6e+6]?=- umag uncertainty (PSFMAGERRu)
2797-2808 E12.6 mag e_gmag [0.0006/513]?=- gmag uncertainty (PSFMAGERRg)
2810-2821 E12.6 mag e_rmag [0.0005/652]?=- rmag uncertainty (PSFMAGERRr)
2823-2834 E12.6 mag e_imag [0.001/2.4e+6]?=- imag uncertainty (PSFMAGERRi)
2836-2847 E12.6 mag e_zmag [0.008/422]?=- zmag uncertainty (PSFMAGERRz)
2849-2860 F12.6 mag Extu [0.009/3.8]?=- Galactic extinction in
the u-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONu)
2862-2873 F12.6 mag Extg [0.007/2.8]?=- Galactic extinction in
the g-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONg)
2875-2886 F12.6 mag Extr [0.005/2.1]?=- Galactic extinction in
the r-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONr)
2888-2899 F12.6 mag Exti [0.003/1.6]?=- Galactic extinction in
the i-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONi)
2901-2912 F12.6 mag Extz [0.002/1.1]?=- Galactic extinction in
the z-band from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S) (EXTINCTIONz)
2914-2921 F8.4 --- SNR [-1.8/120] S/N median value for all good
pixels in the five bands (SNMEDIANALL)
--------------------------------------------------------------------------------
Note (1): "AUTOCLASS_PQN" automated classification as outlined in Section 3.2.
Values as follows:
STAR = if best model fit for the spectrum is STAR (326485 occurrences);
GALAXY = if the best model fit for the spectrum is GALAXY and Zpipe<1 or
if the best model fit for the spectrum is GALAXY, Zpipe≥1, and
at least one other fit is GALAXY (145957 occurrences);
QSO = if the best model fit for the spectrum is QSO, fewer than two
other model fits are STAR, and ZWARNING=0 (819965 occurrences);
VI = selected for visual inspection (50810 occurrences);
UNK = 97398 occurrences.
A classification of "UNK" corresponds to objects that were added to the
superset catalog after the initial automated classification was
completed. All of these records were taken from a catalog of visually
inspected objects that did not have a targeting bit that appears in
Table 1.
Note (2): The visually identified classification for the object.
Definitions for the numeric values appear in Table 2 as follows:
0 = not inspected (731347 occurrences),
1 = star (233859 occurrences),
3 = Quasar (396843 occurrences),
4 = Galaxy (39054 occurrences),
30 = BAL quasar (39501 occurrences),
50 = possible blazar (11 occurrences).
Objects appearing in DR16Q that have values of 1 (Star) or 4 (Galaxy)
have low Z_CONF values. In these cases, the automated pipeline
classification was used to determine whether the object was a quasar.
Note (3): Source for the best available redshift as follows:
PIPE = Redshift from SDSS pipeline in this catalog
("Z_PIPE"; 899007 occurrences)
VI = Redshift from visual inspection in this catalog
(col. zvis: "z_VI"; 465473 occurrences)
DR6Q_HW = from SDSS-DR6 Hewett & Wild (2010, J/MNRAS/405/2302) cat.
(col. zDR6Q: "ZDR6QHW"; 64019 occurrences)
DR7QV_SCH = from SDSS DR7Q (Cat. VII/260)
(col. zDR7Q: "ZDR7QSCH"; 12089 occurrences)
DR12QV = SDSS DR12Q (Cat. VII/279) redshifts from the visual inspection
(27 occurrences)
--------------------------------------------------------------------------------
Global notes:
Note (G1): The unique spectroscopic plate number, modified Julian date of
spectroscopic observation, and fiber ID. The combination of these
three values gives a unique identifier for every spectroscopic
observation in SDSS-I/II/III/IV. Where an object was observed multiple
times we chose the observation with the most confident visual
inspection. If data from visual inspection were not available, the
observation with the highest SNMEDIANALL was chosen as the primary.
Note (G2): The randomized subsample was selected from the superset and
contained some duplicate observations of quasars. All subsampled
10000 observations were unique. Objects were selected from a larger
set where EBOSS_TARGET1 contained the QSO1EBOSSCORE targeting bit
set or had an observation date (MJD≥56839) and pipeline redshift ≥1.8.
See Section 3.4 for further explanations.
Note (G3): The confidence rating for a visually identified redshift.
A value of -1 indicates the object was not selected for the subsample.
A value of 1 is the lowest confidence and 3 is the highest confidence.
A value of 1 typically indicates a spectrum with only one broad
emission peak above the noise spectrum.
Note (G4): A numeric flag indicating whether the automated pipeline correctly
identified the classification and redshift with Δv≤3000km/s.
Value as follows:
-1 = the record was not included in the random subsample,
0 = the pipeline incorrectly identified the classification or redshift, and
1 = both classification and redshift were correct.
Note (G5): See column 143 at http://das.sdss.org/va/qso_properties_dr7/dr7.htm
Note (G6): Binary digit described at:
http://www.sdss.org/dr16/algorithms/bitmasks/#ZWARNING
Note (G7): A blank value indicates the object does not have SDSS photometry
and was selected as a target from another source catalog.
Note (G8): The probability an object is a BAL quasar.
A -1 indicates the object's redshift was too low to have a detection
within the spectroscopic wavelength range.
Note (G9): Objects with only one observation will have values set to 0.
SDSS-I/II (SDSS-III/IV) objects have an MJD before (after) 54663.
--------------------------------------------------------------------------------
History:
Downloaded from: http://data.sdss.org/sas/dr16/eboss/qso/DR16Q/
References:
Schneider et al. Paper I. 2002AJ....123..567S 2002AJ....123..567S Cat. J/AJ/123/567
Schneider et al. Paper II. 2003AJ....126.2579S 2003AJ....126.2579S Cat. J/AJ/126/2579
Schneider et al. DR3Q 2005AJ....130..367S 2005AJ....130..367S Cat. VII/243
Schneider et al. DR5Q 2007AJ....134..102S 2007AJ....134..102S Cat. VII/252
Schneider et al. DR7Q 2010AJ....139.2360S 2010AJ....139.2360S Cat. VII/260
Paris et al. DR9Q 2012A&A...548A..66P 2012A&A...548A..66P Cat. VII/269
Paris et al. DR10Q 2014A&A...563A..54P 2014A&A...563A..54P Cat. VII/270
Paris et al. DR12Q 2017A&A...597A..79P 2017A&A...597A..79P Cat. VII/279
Paris et al. DR14Q 2018A&A...613A..51P 2018A&A...613A..51P Cat. VII/286
(End) Emmanuelle Perret [CDS] 29-Oct-2020