VII/286 SDSS quasar catalog, fourteenth data release (Paris+, 2018)
The Sloan Digital Sky Survey Quasar Catalog: Fourteenth data release.
Paris I., Petitjean P., Aubourg E., Myers A.D., Streblyanska A., Lyke B.W.,
Anderson S.F., Armengaud E., Bautista J., Blanton M.R., Blomqvist M.,
Brinkmann J., Brownstein J.R., Brandt W.N., Burtin E., Dawson K.,
de la Torre S., Georgakakis A., Gil-Marin H., Green P.J., Hall P.B.,
Kneib J.-P., Lamassa S.M., Le Goff J.-M., MacLeod C., Mariappan V.,
McGreer I.D., Merloni A., Noterdaeme P., Palanque-Delabrouille N.,
Percival W.J., Ross A.J., Rossi G., Schneider D.P., Seo H.-J., Tojeiro R.,
Weaver B.A., Weijmans A.-M., Yeche C., Zarrouk P., Zhao G.-B.
<Astron. Astrophys., 613, A51 (2018)>
=2018A&A...613A..51P 2018A&A...613A..51P
=2020yCat.7286....0P 2020yCat.7286....0P
ADC_Keywords: Surveys ; QSOs ; Active gal. nuclei ; Spectroscopy
Keywords: catalogs - surveys - quasars: general
Abstract:
We present the data release 14 Quasar catalog (DR14Q) from the
extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan
Digital Sky Survey IV (SDSS-IV). This catalog includes all
SDSS-IV/eBOSS objects that were spectroscopically targeted as quasar
candidates and that are confirmed as quasars via a new automated
procedure combined with a partial visual inspection of spectra, have
luminosities Mi [z=2] < -20.5 (in a {LAMBDA} CDM cosmology with
H0=70km/s/Mpc, {OMEGA}M=0.3, and {OMEGA}{LAMBDA}=0.7), and
either display at least one emission line with a full width at half
maximum larger than 500km/s or, if not, have interesting/complex
absorption features. The catalog also includes previously
spectroscopically-confirmed quasars from SDSS-I, II, and III. The
catalog contains 526356 quasars (144046 are new discoveries since
the beginning of SDSS-IV) detected over 9376 deg2 (2044 deg2
having new spectroscopic data available) with robust identification
and redshift measured by a combination of principal component
eigenspectra. The catalog is estimated to have about 0.5%
contamination. Redshifts are provided for the MgII emission line. The
catalog identifies 21877 broad absorption line quasars and lists their
characteristics. For each object, the catalog presents five-band (u,
g, r, i, z) CCD-based photometry with typical accuracy of 0.03mag. The
catalog also contains X-ray, ultraviolet, near-infrared, and radio
emission properties of the quasars, when available, from other
large-area surveys. The calibrated digital spectra, covering the
wavelength region 3610-10140Å at a spectral resolution in the range
1300<R<2500, can be retrieved from the SDSS Science Archiver Server.
Description:
We have presented the quasar catalog of the SDSS-IV/eBOSS survey
corresponding to DR 14 of SDSS and resulting from the first 2yr of
SDSS-IV observations. The catalog, DR14Q, contains 526356 quasars,
144046 of which are new discoveries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
dr14q.dat 2212 526356 Final SDSS-DR14 quasar catalog
dr14qv4_4.fits 2880 275072 SDSS-DR14 Quasar Catalog (FITS)
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See also:
https://www.sdss.org/dr14/algorithms/qso_catalog : SDSS QSO DR14 Home Page
Byte-by-byte Description of file: dr14q.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS-DR14 designation HHMMSS.ss+DDMMSS.s
(J2000) corrected by CDS
(SDSS_NAMEc) (1)
20- 37 A18 --- SDSSo SDSS-DR14 designation HHMMSS.ss+DDMMSS.s
(J2000) (SDSS_NAME) (1)
39- 48 F10.6 deg RAdeg Right Ascension (J2000) (RA)
50- 59 F10.6 deg DEdeg Declination (J2000) (DEC)
61- 70 I10 --- THINGID ?=-1 Thing_ID (unique identifier of SDSS
sources) (THING_ID)
72- 76 I5 --- Plate Spectroscopic Plate number (PLATE)
78- 82 I5 --- MJD Spectroscopic MJD (MJD)
84- 87 I4 --- Fiber Spectroscopic Fiber number (FIBERID)
89- 92 A4 --- Note [SDSS BOSS] Information on spectra
(SPECTRO) (12)
94- 101 F8.6 --- z Quasar redshift (Z)
103- 110 F8.6 --- e_z [0] Error on redshift (Z_ERR)
112- 115 A4 --- r_z Origin of redshift (AUTO, VI, PIPE)
(SOURCE_Z)
117- 125 F9.6 --- z.v Redshift from visual inspection (Z_VI)
127- 135 F9.6 --- z.b ?=-1 Redshift from BOSS pipeline (Z_PIPE)
137- 147 F11.6 --- e_z.b []?=-1 Error on BOSS pipeline redshift
(error codes -4, -5, -6) (ZPIPEERR)
149- 150 I2 --- f_z.b ZWARNING flag (ZWARNING) (3)
152- 161 F10.6 --- z.PCA Refined PCA redshift (Z_PCA) (4)
163- 171 F9.6 --- e_z.PCA ?=-1 Error on refined PCA redshift
(ZPCAERR)
173- 179 F7.4 --- zMgII Redshift of Mg ii emission line (Z_MGII)
181- 194 I14 --- Btarg1 BOSS target flag for main survey
(BOSS_TARGET1) (5)
196- 214 I19 --- Atarg1 BOSS target flag for ancillary programs
(ANCILLARY_TARGET1) (5)
216- 232 I17 --- Atarg2 BOSS target flag for ancillary programs
(ANCILLARY_TARGET2) (5)
234- 246 I13 --- eBtarg0 Target selection flag for the
SDSS-IV/eBOSS pilot survey
(EBOSS_TARGET0)
248- 257 I10 --- eBtarg1 Target selection flag for the
SDSS-IV/eBOSS, SDSS-IV/TDSS and
SDSS-IV/SPIDERS quasars (EBOSS_TARGET1)
259- 277 I19 --- eBtarg2 Target selection flag for the
SDSS-IV/eBOSS, SDSS-IV/TDSS and
SDSS-IV/SPIDERS quasars (EBOSS_TARGET2)
279 I1 --- NspSDSS Number of additional spectra available in
SDSS-I/II (NSPECSDSS)
281- 282 I2 --- NspBOSS Number of additional spectra available in
SDSS-III/BOSS (NSPECBOSS)
284- 285 I2 --- Nsp Total number of additional spectra
(N_SPEC)
286- 642 51I7 --- PlateDup Spectroscopic plate number for each
duplicate spectrum (PLATE_DUPLICATE)
643- 999 51I7 --- MJDDup Spectroscopic MJD for each duplicate
spectrum (MJD_DUPLICATE)
1000-1305 51I6 --- FiberDup Spectroscopic fiber number for each
duplicate spectrum (FIBERID_DUPLICATE)
1307 A1 --- SepDup [-] Spectrograph information
(SPECTRO_DUPLICATE)
1309-1318 F10.4 km/s BI(CIV) ?=0 BALnicity Index for C IV troughs
(BI_CIV)
1320-1329 E10.5 km/s e_BI(CIV) ?=0 Error on BI(CIV) (ERRBICIV)
1331 I1 --- RUN [0] SDSS Imaging Run Number of photometric
measurements (RUN_NUMBER)
1333 A1 --- ReRUN [-] SDSS processing information: the
photometric processing rerun number
(RERUN_NUMBER)
1335 I1 --- Colcam [0] containing the image of the object
(COL_NUMBER)
1337 I1 --- Field [0] field number of the run containing
the object (FIELD_NUMBER)
1339 A1 --- objID [-] object identification number (OBJ_ID)
1341-1352 E12.6 3.63uJy Fu ?=-9999 PSF flux in u band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXu) (2)
1354-1365 E12.6 3.63uJy Fg ?=-9999 PSF flux in g band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXg) (2)
1367-1378 E12.6 3.63uJy Fr ?=-9999 PSF flux in r band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXr) (2)
1380-1391 E12.6 3.63uJy Fi ?=-9999 PSF flux in i band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXi) (2)
1393-1404 E12.6 3.63uJy Fz ?=-9999 PSF flux in z band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXz) (2)
1406-1417 F12.6 3.63uJy IVFu ?=-9999 Inverse variance of PSF flux in
u band in nnomggies (IVAR_PSFFLUXu) (2)
1419-1430 F12.6 3.63uJy IVFg ?=-9999 Inverse variance of PSF flux in
g band in nnomggies (IVAR_PSFFLUXg) (2)
1432-1443 F12.6 3.63uJy IVFr ?=-9999 Inverse variance of PSF flux in
r band in nnomggies (IVAR_PSFFLUXr) (2)
1445-1456 F12.6 3.63uJy IVFi ?=-9999 Inverse variance of PSF flux in
i band in nnomggies (IVAR_PSFFLUXi) (2)
1458-1469 F12.6 3.63uJy IVFz ?=-9999 Inverse variance of PSF flux in
z band in nnomggies (2) (IVAR_PSFFLUXz)
1471-1482 E12.6 mag umag ?=-9999 PSF magnitude in u band (not
corrected for Galactic extinction)
(PSFMAGu)
1484-1495 E12.6 mag gmag ?=-9999 PSF magnitude in g band (not
corrected for Galactic extinction)
(PSFMAGg)
1497-1508 E12.6 mag rmag ?=-9999 PSF magnitude in r band (not
corrected for Galactic extinction)
(PSFMAGr)
1510-1521 E12.6 mag imag ?=-9999 PSF magnitude in i band (not
corrected for Galactic extinction)
(PSFMAGi)
1523-1534 E12.6 mag zmag ?=-9999 PSF magnitude in z band (not
corrected for Galactic extinction)
1536-1547 E12.6 mag e_umag ?=-9999 error in PSF magnitude in u band
(ERR_PSFMAGu)
1549-1560 E12.6 mag e_gmag ?=-9999 error in PSF magnitude in g band
(ERR_PSFMAGg)
1562-1573 E12.6 mag e_rmag ?=-9999 error in PSF magnitude in r band
(ERR_PSFMAGr)
1575-1586 E12.6 mag e_imag ?=-9999 error in PSF magnitude in i band
(ERR_PSFMAGi)
1588-1599 E12.6 mag e_zmag ?=-9999 error in PSF magnitude in z band
(ERR_PSFMAGz)
1601-1611 F11.6 mag iMAG ?=9999 Absolute magnitude in the i band
(MI) (10)
1613-1624 F12.6 mag Extu ?=-9999 Galactic extinction in u band
(EXTINCTIONu) (8)
1626-1637 F12.6 mag Extg ?=-9999 Galactic extinction in g band
(EXTINCTIONg) (8)
1639-1650 F12.6 mag Extr ?=-9999 Galactic extinction in r band
(EXTINCTIONr) (8)
1652-1663 F12.6 mag Exti ?=-9999 Galactic extinction in i band
(EXTINCTIONi) (8)
1665-1676 F12.6 mag Extz ?=-9999 Galactic extinction in z band
(EXTINCTIONz) (8)
1678-1683 F6.4 [ct/s] logXct ?=0 log RASS full band count rate
(RASS_COUNTS)
1685-1691 F7.4 --- SNR(X) ?=0 S/N of the RASS count rate
(RASSCOUNTSSNR)
1693-1699 F7.4 arcsec sepX ?=-1 SDSS-RASS separation in arcsec
(SDSS2ROSAT_SEP)
1701-1711 E11.6 mW/m2 F0.2-2 ? Soft (0.2-2keV) X-ray flux from
XMM-Newton (FLUX0.22.0keV)
1713-1723 E11.6 mW/m2 e_F0.2-2 ? Error in soft (0.2-2keV) X-ray flux from
XMM-Newton (FLUX0.22.0keV_ERR)
1725-1735 E11.6 mW/m2 F2-12 ? Hard (2.0-12keV) X-ray flux from
XMM-Newton (FLUX2.012.0keV)
1737-1747 E11.6 mW/m2 e_F2-12 ? Error in hard (2.0-12keV) X-ray flux
from XMM-Newton (FLUX2.012.0keV_ERR)
1749-1759 E11.6 mW/m2 F0.2-12 ? Total flux (0.2-12keV) from XMM-Newton
computed from the longest observation
(FLUX0.212.0keV)
1761-1771 E11.6 mW/m2 e_F0.2-12 ? Error in total flux (0.2-12keV) from
XMM-Newton (FLUX0.212.0keV_ERR)
1773-1783 E11.6 10-7W L0.2-12 ? Total X-ray luminosity (0.2-12keV) from
XMM-Newton using the longest observation
(LUM0.212.0keV) (11)
1785-1790 F6.4 arcsec sepXM ? SDSS-XMM-Newton separation in arcsec
(SDSS2XMM_SEP)
1792 I1 --- GALEX ? GALEX match (ALEX_MATCHED)
1794-1802 F9.4 3.63uJy FFUV ? FUV flux (ALEX) (FUV)
1804-1813 F10.4 3.63uJy-2 IVFUV ? Inverse variance of FUV flux
(in nnomggies-2) (FUV_IVAR)
1815-1823 F9.4 3.63uJy FNUV ? NUV flux (ALEX) (NUV)
1825-1834 F10.4 3.63uJy-2 IVNUV ? Inverse variance of NUV flux
(in nnomggies-2) (NUV_IVAR)
1836-1842 F7.4 mag Jmag ? 2MASS J magnitude (Vega) (JMAG)
1844-1849 F6.4 mag e_Jmag ? Error in J magnitude (Vega)
(ERR_JMAG)
1851-1858 F8.4 --- SNR(J) ? J-band S/N (JSNR)
1860-1861 I2 --- f_Jmag ?=-1 J-band photometry flag (JRDFLAG)
1863-1869 F7.4 mag Hmag ? 2MASS H magnitude (Vega) (HMAG)
1871-1876 F6.4 mag e_Hmag ? Error in H magnitude (ERR_HMAG)
1878-1885 F8.4 --- SNR(H) ? H-band S/N (HSNR)
1887-1888 I2 --- f_Hmag ?=-1 H-band photometry flag (HRDFLAG)
1890-1896 F7.4 mag Kmag ? 2MASS K magnitude (Vega) (KMAG)
1898-1903 F6.4 mag e_Kmag ? Error in K magnitude (ERR_KMAG)
1905-1912 F8.4 --- SNR(K) ? K-band S/N (KSNR)
1914-1915 I2 --- f_Kmag ?=-1 K-band photometry flag (KRDFLAG)
1917-1924 F8.6 arcsec Sep2 ? SDSS-2MASS separation in arcsec
(SDSS2MASS_SEP)
1926-1932 F7.4 mag W1mag ? WISE W1 magnitude (Vega) (W1MAG)
1934-1939 F6.4 mag e_W1mag ? Error in W1 magnitude (ERR_W1MAG)
1941-1947 F7.4 --- W1SNR ? S/N in W1 band (W1SNR)
1949-1955 F7.4 --- W1chi2 ? χ2 in W1 band (W1CHI2)
1957-1963 F7.4 mag W2mag ? WISE W2 magnitude (Vega) (W2MAG)
1965-1970 F6.4 mag e_W2mag ? Error in W2 magnitude (ERR_W2MAG)
1972-1979 F8.4 --- W2SNR ? S/N in W2 band (W2SNR)
1981-1987 F7.4 --- W2chi2 ? χ2 in W2 band (W2CHI2)
1989-1995 F7.4 mag W3mag ? WISE W3 magnitude (Vega) (W3MAG)
1997-2002 F6.4 mag e_W3mag ? Error in W3 magnitude (ERR_W3MAG)
2004-2011 F8.4 --- W3SNR ? S/N in W3 band (W3SNR)
2013-2021 F9.4 --- W3chi2 ? χ2 in W3 band (W3CHI2)
2023-2029 F7.4 mag W4mag ? WISE W4 magnitude (Vega) (W4MAG)
2031-2036 F6.4 mag e_W4mag ? Error in W4 magnitude (ERR_W4MAG)
2038-2044 F7.4 --- W4SNR ? S/N in W4 band (W4SNR)
2046-2054 F9.4 --- W4chi2 ? χ2 in W4 band (W4CHI2)
2056-2059 A4 --- CCflags WISE contamination and confusion flag
(CC_FLAGS)
2061-2064 A4 --- PHflag WISE photometric quality flag (PH_FLAG)
2066-2073 F8.6 arcsec sepW ? SDSS-WISE separation in arcsec
(SDSS2WISE_SEP)
2075 I1 --- UKIDSS ? UKIDSS Matched (UKIDSS_MATCHED)
2077-2088 E12.6 W/m2/Hz FY ?=0 Y-band flux density from UKIDSS
(YFLUX)
2090-2101 E12.6 W/m2/Hz e_FY ?=0 Error in Y-band density flux from
UKIDSS (YFLUX_ERR)
2103-2114 E12.6 W/m2/Hz FJ ?=0 J-band flux density from UKIDSS
(JFLUX)
2116-2127 E12.6 W/m2/Hz e_FJ ?=0 Error in J-band flux density from
UKIDSS (JFLUX_ERR)
2129-2140 E12.6 W/m2/Hz FH ?=0 H-band flux density from UKIDSS
(HFLUX)
2142-2153 E12.6 W/m2/Hz e_FH ?=0 Error in H-band flux density from
UKIDSS (HFLUX_ERR)
2155-2166 E12.6 W/m2/Hz FK ?=0 K-band flux density from UKIDSS
(KFLUX)
2168-2179 E12.6 W/m2/Hz e_FK ?=0 Error in K-band flux density from
UKIDSS (KFLUX_ERR)
2181-2182 I2 --- FIRST [0/1]?=-1 FIRST matched (FIRST_MATCHED)
2184-2193 F10.4 mJy F1p ?=-1 FIRST peak flux density at 20 cm
expressed in mJy (FIRST_FLUX)
2195-2204 F10.4 --- SNR(1) ?=-1 S/N of the FIRST flux density
(FIRST_SNR)
2206-2212 F7.4 arcsec sep1 ?=-1 SDSS-FIRST separation in arcsec
(SDSS2FIRST_SEP)
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Note (1): Some SDSS names were erroneous. The corrected names have been
added by CDS.
Note (2): In SDSS-III, we express all fluxes in terms of "nnomggies",
which are a convenient linear unit. These quantities are related to
standard AB magnitudes: an object with flux F given in nMgy has a
Pogson magnitude (on AB scale) m=[22.5mag]-2.5log10F. A flux of 1Mgy
is therefore close to 3631Jy, and 1nMgy≃3.631µJy.
Note (3): the "zwarning" flag is made of the following bits:
1 [0] = sky fiber
2 [1] = too little wavelength coverage
4 [2] = chi-squared of best fit is too close to that of second best
8 [3] = synthetic spectrum is negative
16 [4] = fraction of points more than 5σ away from best model
is too large (>5%)
32 [5] = chi-squared minimum at edge of the redshift fitting range
64 [6] = a QSO line exhibits negative emission (triggered only in QSO
spectra if CIV, CIII, MgII, Hβ, or Hα has
lineArea+3σ(lineArea)<0)
128 [7] = the fiber was unplugged, so no spectrum obtained
Note (4): Principal Component Analysis of quasar spectra, see
Paris et al. 2011, Cat. J/A+A/530/A50; the quality is defined
by Eq.(11) in Paris et al. (2011A&A...530A..50P 2011A&A...530A..50P)
Note (5): See Dawson et al. 2013AJ....145...10D 2013AJ....145...10D for the description
of the target selection flags.
Note (8): from Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S)
Note (10): [z=2](H0=67.8km/s/Mpc, {OMEGA}M=0.308, {OMEGA}_λ=0.692,
αv=-0.5 (MI)
Note (11): using Z_VI and H0=70km/s/Mpc, {OMEGA}M=0.3, {OMEGA}_λ=0.7
Note (12): Information on spectra as follows:
SDSS = spectra released prior to SDSS-DR8 (Aihara et al. 2011ApJS..193...29A 2011ApJS..193...29A)
BOSS = spectra taken with the BOSS spectrographs (Smee et al.
2013AJ....146...32S 2013AJ....146...32S)
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History:
Copied at https://data.sdss.org/sas/dr14/eboss/qso/DR14Q/DR14Q_v4_4.fits
Acknowledgements:
Thanks to Heinz Andernach to generate SDSS names for original ones
set to 00000-00000
(End) Patricia Vannier [CDS] 10-Feb-2020