ACDS V10.0 - Sat Apr 20 20:20:32 CEST 2019
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Detailed Description of VII/279 :
SDSS quasar catalog: twelfth data release (Paris+, 2017)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
VII/279 SDSS quasar catalog: twelfth data release (Paris+, 2017)
================================================================================
The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release.
Paris I., Petitjean P., Ross N.P., Myers A.D., Aubourg E., Streblyanska A.,
Bailey S., Armengaud E., Palanque-Delabrouille N., Yeche C., Hamann F.,
Strauss M.A., Albareti F.D., Bovy J., Bizyaev D., Brandt W.N., Brusa M.,
Buchner J., Comparat J., Croft R.A.C., Dwelly T., Fan X., Font-Ribera A.,
Ge J., Georgakakis A., Hall P.B., Jiang L., Kinemuchi K., Malanushenko E.,
Malanushenko V., Mcmahon R.G., Menzel M.-L., Merloni A., Nandra K.,
Noterdaeme P., Oravetz D., Pan K., Pieri M.M., Prada F., Salvato M.,
Schlegel D.J., Schneider D.P., Simmons A., Viel M., Weinberg D.H., Zhu L.
<Astron. Astrophys., 597, A79 (2017)>
=2017A&A...597A..79P (SIMBAD/NED BibCode)
=2017yCat.7278....0P
================================================================================
ADC_Keywords: Surveys ; QSOs ; Active gal. nuclei ; Spectroscopy
Keywords: catalogs - surveys - quasars: general
Abstract:
We present the Data Release 12 Quasar catalog (DR12Q) from the Baryon
Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky
SurveyIII. This catalog includes all SDSS-III/BOSS objects that were
spectroscopically targeted as quasar candidates during the full survey
and that are confirmed as quasars via visual inspection of the
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 (FWHM) larger than 500km/s or, if
not, have interesting/complex absorption features. The catalog also
includes previously known quasars (mostly from SDSS-I andII) that were
reobserved by BOSS. The catalog contains 297 301 quasars (272 026 are
new discoveries since the beginning of SDSS-III) detected over
9376deg2 with robust identification and redshift measured by a
combination of principal component eigenspectra. The number of quasars
with z>2.15 (184 101, of which 167 742 are new discoveries) is about
an order of magnitude greater than the number of z>2.15 quasars known
prior to BOSS. Redshifts and FWHMs are provided for the strongest
emission lines (CIV, CIII], MgII). The catalog identifies 29 580 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 together with some
information on the optical morphology and the selection criteria. When
available, the catalog also provides information on the optical
variability of quasars using SDSS and Palomar Transient Factory
multi-epoch photometry. 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 3600-10 500Å at a spectral
resolution in the range 1300<R<2500, can be retrieved from the SDSS
Catalog Archive Server. We also provide a supplemental list of an
additional 4841 quasars that have been identified serendipitously
outside of the superset defined to derive the main quasar catalog.
Description:
We present the final quasar catalog of the SDSS-III/BOSS survey
resulting from five years of observations. The catalog, which we call
"DR12Q", contains 297301 quasars, 184101 of which have
z>2.15. We provide robust identification from visual inspection and
refined redshift measurements based on the result of a principal
component analysis of the spectra. The present catalog contains about
80% more quasars than our previous release (Paris et al., 2014, Cat.
VII/270). As part of DR12Q, we also provide a catalog of 29580 BAL
quasars and their properties. Spectroscopic line measurements are
provided together with multi-wavelength matching with GALEX, 2MASS,
UKIDSS, WISE, FIRST, RASS and XMM-Newton observations.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× dr12q.dat 2742 297301 SDSS-DR12 Quasar Catalog
× DR12Q.fits 2880 186665 SDSS-DR12 Quasar Catalog (FITS)
× dr12qbal.dat 1525 29580 Detailed properties of BAL quasars
× DR12Q_BAL.fits 2880 10156 Detailed properties of BAL quasars (FITS)
× dr12qsp.dat 476 4841 Supplementary list that contains serendipitous
quasars
× DR12Q_sup.fits 2880 388 Supplementary list that contains serendipitous
quasars (FITS)
× dr12qspb.dat 476 226 Supplementary list that contains quasars
identified on bad plates
× DR12Q_supbad.fits 2880 32 Supplementary list that contains quasars
identified on bad plates (FITS)
See also:
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
Byte-by-byte Description of file: dr12q.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) corrected by CDS
(SDSS_NAMEc) (G1)
20- 37 A18 --- SDSSo SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) (SDSS_NAME) (G1)
39- 48 F10.6 deg RAdeg Right Ascension (J2000) (RA)
50- 59 F10.6 deg DEdeg Declination (J2000) (DEC)
61- 70 I10 --- THINGID Thing_ID (unique identifier of SDSS
sources) (THING_ID)
72- 75 I4 --- Plate Spectroscopic Plate number (PLATE)
77- 81 I5 --- MJD Spectroscopic MJD (MJD)
83- 86 I4 --- Fiber Spectroscopic Fiber number (FIBERID)
88- 95 F8.6 --- z.v Redshift from visual inspection (Z_VI)
97-105 F9.6 --- z.b ?=-1 Redshift from BOSS pipeline (Z_PIPE)
107-118 F12.6 --- e_z.b []?=-1 Error on BOSS pipeline redshift
(error codes -4, -5, -6) (ERR_ZPIPE)
120-122 I3 --- f_z.b ZWARNING flag (ZWARNING) (G3)
124-132 F9.6 --- z.PCA Refined PCA redshift (Z_PCA) (G4)
134-142 F9.6 --- e_z.PCA ?=-1 Error on refined PCA redshift
(ERR_ZPCA)
144-153 E10.4 --- qCont Estimator of the PCA continuum quality
(PCA_QUAL)
155-161 F7.4 --- zCIV Redshift of CIV emission line (Z_CIV)
163-169 F7.4 --- zCIII Redshift of C iii] emission complex
(Z_CIII)
171-177 F7.4 --- zMgII Redshift of Mg ii emission line (Z_MGII)
179-180 I2 --- Morph SDSS morphology flag
0=point source 1=extended (SDSS_MORPHO)
182-195 I14 --- Btarg1 BOSS target flag for main survey
(BOSS_TARGET1) (G5)
197-215 I19 --- Atarg1 BOSS target flag for ancillary programs
(ANCILLARY_TARGET1) (G5)
217-233 I17 --- Atarg2 BOSS target flag for ancillary programs
(ANCILLARY_TARGET2) (G5)
235-247 I13 --- eBtarg0 Target selection flag for the
SDSS-IV/eBOSS pilot survey (EBOSS_TARGET0)
249-250 I2 --- NspBOSS Number of additional spectra available in
SDSS-III/BOSS (NSPEC_BOSS)
251-442 32I6 --- PlateDup Spectroscopic plate number for each
duplicate spectrum (PLATE_DUPLICATE)
443-666 32I7 --- MJDDup Spectroscopic MJD for each duplicate
spectrum (MJD_DUPLICATE)
667-858 32I6 --- FiberDup Spectroscopic fiber number for each
duplicate spectrum (FIBERID_DUPLICATE)
860 I1 --- f7 [0/1] 1 if the quasar is known from DR7
(SDSS_DR7)
862-866 I5 --- Plate7 ?=-1 SDSS-DR7 spectroscopic Plate number
if the quasar is known from DR7
(PLATE_DR7)
868-873 I6 --- MJD7 ?=-1 SDSS-DR7 spectroscopic MJD if the
quasar is known from DR7 (MJD_DR7)
875-878 I4 --- Fiber7 ?=-1 SDSS-DR7 spectroscopic Fiber number
if the quasar is known from DR7
(FIBERID_DR7)
880 I1 --- US [0/2] Uniform sample flag (UNIFORM) (G6)
882-890 F9.4 --- alphanu Spectral index measurement (ALPHA_NU)
892-900 F9.4 --- SNRSpec Median signal-to-noise ratio over the
whole spectrum (SNR_SPEC)
901-1220 32F10.4 --- SNRDup Median signal-to-noise ratio over the
whole spectrum of duplicate SDSS-III/BOSS
spectra when available (SNR_DUPLICATE)
1222-1230 F9.4 --- SNR1700 Median signal-to-noise ratio in the
window 1650-1750Å (rest frame)
(SNR_1700)
1232-1240 F9.4 --- SNR3000 Median signal-to-noise ratio in the
window 2950-3050Å (rest frame)
(SNR_3000)
1242-1250 F9.4 --- SNR5150 Median signal-to-noise ratio in the
window 5100-5250Å (rest frame)
(SNR_5150)
1252-1261 F10.4 km/s FW(CIV) ?=-1 FWHM of CIV emission line (FWHM_CIV)
1263-1272 F10.4 km/s HW(CIV)b ?=-1 Blue HWHM of CIV emission line
(BHWHM_CIV)
1274-1283 F10.4 km/s HW(CIV)r ?=-1 Red HWHM of CIV emission line
(RHWHM_CIV)
1285-1293 F9.4 --- A(CIV) Amplitude of CIV emission line in units
of median rms pixel noise (AMP_CIV)
1295-1308 E14.7 0.1nm W(CIV) ?=-1 Rest frame equivalent width of CIV
emission line in Å (REWE_CIV)
1309-1321 E13.7 0.1nm e_W(CIV) ?=-1 Uncertainty on the rest frame
equivalent width of CIV emission line
(ERRREWECIV)
1323-1332 F10.4 km/s FW(CIII) ?=-1 FWHM of CIII] emission complex
(FWHM_CIII)
1334-1343 F10.4 km/s HW(CIII)b ?=-1 Blue HWHM of CIII] emission line
(BHWHM_CIII)
1345-1354 F10.4 km/s HW(CIII)r ?=-1 Red HWHM of CIII] emission line
(RHWHM_CIII)
1356-1364 F9.4 --- A(CIII) Amplitude of CIII] emission complex in
units of median rms pixel noise (AMP_CIII)
1366-1378 E13.7 0.1nm W(CIII) ?=-1 Rest frame equivalent width of CIII]
emission line in Å (REWE_CIII)
1380-1392 E13.7 0.1nm e_W(CIII) ?=-1 Uncertainty on the rest frame
equivalent width of CIII] emission
complex (ERRREWECIII)
1394-1403 F10.4 km/s FW(MgII) ?=-1 FWHM of MgII emission line
(FWHM_MGII)
1405-1414 F10.4 km/s HW(MgII)b ?=-1 Blue HWHM of MgII emission line
(BHWHM_MGII)
1416-1425 F10.4 km/s HW(MgII)r ?=-1 Red HWHM of MgII emission line
(RHWHM_MGII)
1427-1436 F10.4 --- A(MgII) Amplitude of MgII emission line in units
of median rms pixel noise (AMP_MGII)
1438-1450 E13.7 0.1nm W(MgII) ?=-1 Rest frame equivalent width of MgII
emission line (REWE_MGII)
1452-1464 E13.7 0.1nm e_W(MgII) ?=-1 Uncertainty on the rest frame
equivalent width of MgII emission
(ERRREWEMGII)
1466 I1 --- BAL-VI [0/1] BAL flag from visual inspection
(BALFLAGVI)
1468-1477 F10.4 km/s BI(CIVt) ?=-1 Balnicity index of CIV trough
(BI_CIV)
1479-1488 F10.4 km/s e_BI(CIVt) ?=-1 Error on the Balnicity index of CIV
trough (ERRBICIV)
1490-1499 F10.4 km/s AI(CIVt) ?=-1 Absorption index of CIV trough
(AI_CIV)
1501-1510 F10.4 km/s e_AI(CIVt) ?=-1 Error on the absorption index of
CIV trough (ERRAICIV)
1512-1521 F10.4 --- Chi2CIVt ?=0 {chi}2 of the trough from Eq. (3) in
Paris et al. (2012, Cat. VII/269)
(CHI2TROUGH)
1523-1524 I2 --- N2t Number of distinct CIV troughs of width
larger than 2000km/s (NCIV_2000)
1526-1535 F10.4 km/s Vmin2t ?=0 Minimum velocity of the CIV troughs
(VMINCIV2000)
1537-1546 F10.4 km/s Vmax2t ?=0 Maximum velocity of the CIV troughs
(VMAXCIV2000)
1548-1550 I3 --- N.45t Number of distinct CIV troughs of width
larger than 450km/s (NCIV_450)
1552-1561 F10.4 km/s Vmin.45t ?=0 Minimum velocity of the CIV troughs
(VMINCIV450)
1563-1572 F10.4 km/s Vmax.45t ?=0 Maximum velocity of the CIV troughs
(VMAXCIV450)
1574-1583 F10.4 0.1nm W(SiIVt) ?=0 Rest frame equivalent width of the
Si iv trough (REW_SIIV)
1585-1594 F10.4 0.1nm W(CIVt) ?=0 Rest frame equivalent width of the
CIV trough (REW_CIV)
1596-1605 F10.4 0.1nm W(AlIIIt) ?=0 Rest frame equivalent width of the
AlIII] trough (REW_ALIII)
1607-1610 I4 --- RUN SDSS Imaging Run Number of photometric
measurements (RUN_NUMBER)
1612-1616 I5 --- Ph-MJD Modified Julian Date of imaging
observation (PHOTO_MJD)
1618-1620 A3 --- Rerun SDSS Photometric Processing Rerun Number
(RERUN_NUMBER)
1622 I1 --- Colcam [1/6]?=0 SDSS Camera Column Number
(COL_NUMBER)
1624-1626 I3 --- Field SDSS Field Number (FIELD_NUMBER)
1628-1646 A19 --- objID SDSS Object Identification Number (OBJ_ID)
1648-1659 E12.6 3.63uJy Fu ?=-9999 PSF flux in u band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXu) (G2)
1661-1672 E12.6 3.63uJy Fg ?=-9999 PSF flux in g band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXg) (G2)
1674-1685 E12.6 3.63uJy Fr ?=-9999 PSF flux in r band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXr) (G2)
1687-1698 E12.6 3.63uJy Fi ?=-9999 PSF flux in i band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXi) (G2)
1700-1711 E12.6 3.63uJy Fz ?=-9999 PSF flux in z band (not corrected
for Galactic extinction) in nnomggies
(PSFFLUXz) (G2)
1713-1722 F10.6 3.63uJy IVFu Inverse variance of of PSF flux in u band
in nnomggies (IVAR_PSFFLUXu) (G2)
1724-1733 F10.6 3.63uJy IVFg Inverse variance of of PSF flux in g band
in nnomggies (IVAR_PSFFLUXg) (G2)
1735-1744 F10.6 3.63uJy IVFr Inverse variance of of PSF flux in r band
in nnomggies (IVAR_PSFFLUXr) (G2)
1746-1755 F10.6 3.63uJy IVFi Inverse variance of of PSF flux in i band
in nnomggies (IVAR_PSFFLUXi) (G2)
1757-1766 F10.6 3.63uJy IVFz Inverse variance of of PSF flux in z band
in nnomggies (G2) (IVAR_PSFFLUXz)
1768-1779 E12.6 mag umag ?=-9999 PSF magnitude in u band (not
corrected for Galactic extinction)
(PSFMAGu)
1781-1792 E12.6 mag gmag ?=-9999 PSF magnitude in g band (not
corrected for Galactic extinction)
(PSFMAGg)
1794-1805 E12.6 mag rmag ?=-9999 PSF magnitude in r band (not
corrected for Galactic extinction)
(PSFMAGr)
1807-1818 E12.6 mag imag ?=-9999 PSF magnitude in i band (not
corrected for Galactic extinction)
(PSFMAGi)
1820-1831 E12.6 mag zmag ?=-9999 PSF magnitude in z band (not
corrected for Galactic extinction)
1833-1844 E12.6 mag e_umag ?=-9999 error in PSF magnitude in u band
(ERR_PSFMAGu)
1846-1857 E12.6 mag e_gmag ?=-9999 error in PSF magnitude in g band
(ERR_PSFMAGg)
1859-1870 E12.6 mag e_rmag ?=-9999 error in PSF magnitude in r band
(ERR_PSFMAGr)
1872-1883 E12.6 mag e_imag ?=-9999 error in PSF magnitude in i band
(ERR_PSFMAGi)
1885-1896 E12.6 mag e_zmag ?=-9999 error in PSF magnitude in z band
(ERR_PSFMAGz)
1898-1909 E12.6 3.63uJy Fut ?=-9999 Target flux in the u band
(not corrected for Galactic extinction)
in nnomggies (G2) (TARGET_FLUXu)
1911-1922 E12.6 3.63uJy Fgt ?=-9999 Target flux in the g band
(not corrected for Galactic extinction)
in nnomggies (G2) (TARGET_FLUXg)
1924-1935 E12.6 3.63uJy Frt ?=-9999 Target flux in the r band
(not corrected for Galactic extinction)
in nnomggies (G2) (TARGET_FLUXr)
1937-1948 E12.6 3.63uJy Fit ?=-9999 Target flux in the i band
(not corrected for Galactic extinction)
in nnomggies (G2) (TARGET_FLUXi)
1950-1961 E12.6 3.63uJy Fzt ?=-9999 Target flux in the z band
(not corrected for Galactic extinction)
in nnomggies (G2) (TARGET_FLUXz)
1963-1975 F13.6 mag iMAG ? Absolute i magnitude (1)
1977-1989 F13.6 mag D(g-i) ? {Delta}(g-i)=(g-i)-<(g-i)>redshift
(Galactic extinction corrected)
(DGMI) (G7)
1991-1998 F8.6 mag Extu ? Galactic extinction in u band
(EXTINCTIONu) (G8)
2000-2007 F8.6 mag Extg ? Galactic extinction in g band
(EXTINCTIONg) (G8)
2009-2016 F8.6 mag Extr ? Galactic extinction in r band
(EXTINCTIONr) (G8)
2018-2025 F8.6 mag Exti ? Galactic extinction in i band
(EXTINCTIONi) (G8)
2027-2034 F8.6 mag Extz ? Galactic extinction in z band
(EXTINCTIONz) (G8)
2036-2043 F8.6 mag ExtuR Recalculated Galactic extinction in u
(EXTINCTION_RECALu) (G9)
2045-2052 F8.6 mag ExtgR Recalculated Galactic extinction in g
(EXTINCTION_RECALg) (G9)
2054-2061 F8.6 mag ExtrR Recalculated Galactic extinction in r
(EXTINCTION_RECALr) (G9)
2063-2070 F8.6 mag ExtiR Recalculated Galactic extinction in i
(EXTINCTION_RECALi) (G9)
2072-2079 F8.6 mag ExtzR Recalculated Galactic extinction in z
(EXTINCTION_RECALz) (G9)
2081-2087 F7.4 [cm-2] logNHI logarithm of Galactic HI column density
(HI_GAL)
2089-2091 I3 --- Varmatch Flag for variability information
(0 if not available) (VAR_MATCHED)
2093-2099 F7.2 --- Varchi2 Reduced {chi}2 when the light curve is
fit with a constant (VAR_CHI2)
2101-2107 F7.5 --- VarA Structure function parameter A as defined
in Palanque-Delabrouille et al.
(2011A&A...530A.122P) (VAR_A)
2109-2116 F8.5 - Vargamma Structure function parameter {gamma} as
defined in Palanque-Delabrouille et al.
(2011A&A...530A.122P) (VAR_GAMMA)
2118-2123 F6.4 [ct/s] logXct log RASS full band count rate
(RASS_COUNTS)
2125-2131 F7.4 --- SNR(X) S/N of the RASS count rate
(RASSCOUNTSSNR)
2133-2139 F7.4 arcsec sepX SDSS-RASS separation in arcsec
(SDSS2ROSAT_SEP)
2141-2146 I6 --- NDetX Number of detections in XMM-Newton
(NDETECTIONXMM)
2148-2158 E11.6 mW/m2 F0.2-12 Total flux (0.2-12keV) from XMM-Newton
computed from the longest observation
FLUX0212KEVSGL)
2160-2170 E11.6 mW/m2 e_F0.2-12 Error in total flux (0.2-12keV) from
XMM-NewtonRFLUX0212KEV_SGL)
2172-2182 E11.6 mW/m2 F0.2-2 Soft (0.2-2keV) X-ray flux from
XMM-Newton (FLUX02_2KEV)
2184-2194 E11.6 mW/m2 e_F0.2-2 Error in soft (0.2-2keV) X-ray flux from
XMM-Newton (ERRFLUX022KEV)
2196-2206 E11.6 mW/m2 F4.5-12 Hard (4.5-12keV) X-ray flux from
XMM-Newton (FLUX2_12KEV)
2208-2218 E11.6 mW/m2 e_F4.5-12 Error in hard (4.5-12keV) X-ray flux
from XMM-Newton (ERRFLUX212KEV)
2220-2230 E11.6 mW/m2 F0.2-12W Total weighted average flux (0.2-12keV)
from XMM-Newton (FLUX02_12KEV)
2232-2242 E11.6 mW/m2 e_F0.2-12W Error in total flux (0.2-12keV)
from XMM-Newton (ERRFLUX0212KEV)
2244-2254 E11.6 10-7W L0.2-12 Total X-ray luminosity (0.2-12keV) from
XMM-Newton using the longest observation
(LUM022KEVSGL) (2)
2256-2266 E11.6 10-7W L0.5-2 Soft (0.2-2keV) X-ray luminosity from
XMM-Newton (LUM05_2KEV) (2)
2268-2278 E11.6 10-7W L4.5-12 Hard (4.5-12keV) X-ray luminosity from
XMM-Newton (LUM2_12KEV) (2)
2280-2290 E11.6 10-7W L0.2-2W Total X-ray luminosity (0.2-12keV) from
XMM-Newton using weighted average flux
(LUM02_2KEV) (2)
2296-2297 I2 --- f_F4.5-12 [0/1]?=-1 Flag for upper limit of hard
X-ray flux (LUMX210UPPER)
2299-2304 F6.4 arcsec sepXM ?=0 SDSS-XMM-Newton separation in arcsec
(SDSS2XMM_SEP)
2306 I1 --- GALEX GALEX match (GALEX_MATCHED)
2308-2316 F9.4 3.63uJy FFUV ?=0 FUV flux (GALEX) (FUV)
2318-2327 F10.4 3.63uJy-2 IVFUV ?=0 Inverse variance of FUV flux
(in nnomggies-2) (FUV_IVAR)
2329-2337 F9.4 3.63uJy FNUV ?=0 NUV flux (GALEX) (NUV)
2339-2348 F10.4 3.63uJy-2 IVNUV ?=0 Inverse variance of NUV flux
(in nnomggies-2) (NUV_IVAR)
2350-2356 F7.4 mag Jmag ?=0 2MASS J magnitude (Vega) (JMAG)
2358-2367 F10.4 mag e_Jmag ?=0 Error in J magnitude (Vega)
(ERR_JMAG)
2369-2378 F10.4 --- SNR(J) ?=0 J-band S/N (JSNR)
2380 I1 --- f_Jmag ?=0 J-band photometry flag (JRDFLAG)
2382-2388 F7.4 mag Hmag ?=0 2MASS H magnitude (Vega) (HMAG)
2390-2399 F10.4 mag e_Hmag ?=0 Error in H magnitude (ERR_HMAG)
2401-2410 F10.4 --- SNR(H) ?=0 H-band S/N (HSNR)
2412 I1 --- f_Hmag ?=0 H-band photometry flag (HRDFLAG)
2414-2420 F7.4 mag Kmag ?=0 2MASS K magnitude (Vega) (KMAG)
2422-2431 F10.4 mag e_Kmag ?=0 Error in K magnitude (ERR_KMAG)
2433-2442 F10.4 --- SNR(K) ?=0 K-band S/N (KSNR)
2444 I1 --- f_Kmag ?=0 K-band photometry flag (KRDFLAG)
2446-2452 F7.4 arcsec Sep2 ?=0 SDSS-2MASS separation in arcsec
(SDSS2MASS_SEP)
2454-2460 F7.4 mag W1mag ?=0 WISE W1 magnitude (Vega) (W1MAG)
2462-2470 F9.4 mag e_W1mag ?=0 Error in W1 magnitude (ERR_W1MAG)
2472-2478 F7.4 --- W1SNR ?=0 S/N in W1 band (W1SNR)
2480-2486 F7.4 --- W1chi2 ?=0 {chi}2 in W1 band (W1CHI2)
2488-2494 F7.4 mag W2mag ?=0 WISE W2 magnitude (Vega) (W2MAG)
2496-2504 F9.4 mag e_W2mag ?=0 Error in W2 magnitude (ERR_W2MAG)
2506-2513 F8.4 --- W2SNR ?=0 S/N in W2 band (W2SNR)
2515-2521 F7.4 --- W2chi2 ?=0 {chi}2 in W2 band (W2CHI2)
2523-2529 F7.4 mag W3mag ?=0 WISE W3 magnitude (Vega) (W3MAG)
2531-2539 F9.4 mag e_W3mag ?=0 Error in W3 magnitude
(ERR_W3MAG)
2541-2548 F8.4 --- W3SNR ?=0 S/N in W3 band (W3SNR)
2550-2557 F8.4 --- W3chi2 ?=0 {chi}2 in W3 band (W3CHI2)
2559-2565 F7.4 mag W4mag ?=0 WISE W4 magnitude (Vega) (W4MAG)
2567-2575 F9.4 mag e_W4mag ?=0 Error in W4 magnitude
(ERR_W4MAG)
2577-2583 F7.4 --- W4SNR S/N in W4 band (W4SNR)
2585-2587 F3.1 --- W4chi2 {chi}2 in W4 band (W4CHI2)
2589-2592 A4 --- CCflags WISE contamination and confusion flag
(CC_FLAGS)
2594-2597 A4 --- PHflag WISE photometric quality flag (PH_FLAG)
2599-2604 F6.4 arcsec sepW SDSS-WISE separation in arcsec
(SDSS2WISE_SEP)
2606 I1 --- UKIDSS UKIDSS Matched (UKIDSS_MATCHED)
2608-2619 E12.6 W/m2/Hz FY Y-band flux density from UKIDSS (YFLUX)
2621-2632 E12.6 W/m2/Hz e_FY ?=0 Error in Y-band density flux from
UKIDSS (YFLUX_ERR)
2634-2645 E12.6 W/m2/Hz FJ ?=0 J-band flux density from UKIDSS
(JFLUX)
2647-2658 E12.6 W/m2/Hz e_FJ ?=0 Error in J-band flux density from
UKIDSS (JFLUX_ERR)
2660-2671 E12.6 W/m2/Hz FH ?=0 H-band flux density from UKIDSS
(HFLUX)
2673-2684 E12.6 W/m2/Hz e_FH ?=0 Error in H-band flux density from
UKIDSS (HFLUX_ERR)
2686-2697 E12.6 W/m2/Hz FK ?=0 K-band flux density from UKIDSS
(KFLUX)
2699-2710 E12.6 W/m2/Hz e_FK ?=0 Error in K-band flux density from
UKIDSS (KFLUX_ERR)
2712-2713 I2 --- FIRST FIRST matched (FIRST_MATCHED)
2715-2724 F10.4 mJy F1p ?=0 FIRST peak flux density at 20 cm
expressed in mJy (FIRST_FLUX)
2726-2735 F10.4 --- SNR(1) ?=0 S/N of the FIRST flux density
(FIRST_SNR)
2737-2742 F6.4 arcsec sep1 ?=0 SDSS-FIRST separation in arcsec
(SDSS2FIRST_SEP)
Note (1): [z=2](H0=67.8km/s/Mpc, {OMEGA}M=0.308, {OMEGA}_{lambda}=0.692,
{alpha}v=-0.5 (MI)
Note (2): using Z_VI and H0=70km/s/Mpc, {OMEGA}M=0.3, {OMEGA}_{lambda}=0.7
Byte-by-byte Description of file: dr12qbal.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) corrected by CDS
(SDSS_NAMEc) (G1)
20- 37 A18 --- SDSSo SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) (SDSS_NAME) (G1)
39- 48 F10.6 deg RAdeg Right Ascension (J2000) (RA)
50- 59 F10.6 deg DEdeg Declination (J2000) (DEC)
61- 70 I10 --- THINGID Thing_ID (unique SDSS source identifier)
(THING_ID)
72- 75 I4 --- Plate Spectroscopic Plate number (PLATE)
77- 81 I5 --- MJD Spectroscopic MJD (MJD)
83- 86 I4 --- Fiber Spectroscopic Fiber number (FIBERID)
88- 95 F8.6 --- z.v Redshift from visual inspection (Z_VI)
97-105 F9.6 --- z.b ?=-1 Redshift from BOSS pipeline (Z_PIPE)
107-116 F10.6 --- e_z.b []?=-1 Error on BOSS pipeline redshift
(error codes -4, -5, -6) (ERR_ZPIPE)
118-120 I3 --- f_z.b ZWARNING flag (ZWARNING) (G3)
122-130 F9.6 --- z.PCA ?=-1 PCA redshift (Z_PCA) (G4)
132-140 F9.6 --- e_z.PCA ?=-1 Error on PCA redshift (ERR_ZPCA)
142-143 I2 --- Morph [0/1]?=-1 SDSS morphology flag
0=point source 1=extended (SDSS_MORPHO)
145-158 I14 --- Btarg1 BOSS target flag for main survey
(BOSS_TARGET1) (G5)
160-178 I19 --- Atarg1 BOSS target flag for ancillary programs
(ANCILLARY_TARGET1) (G5)
180-196 I17 --- Atarg2 BOSS target flag for ancillary programs
(ANCILLARY_TARGET2) (G5)
198-210 I13 --- eBtarg0 Target selection flag for eBOSS pilot
survey (EBOSS_TARGET0)
212-222 F11.6 3.63uJy Fu PSF flux in the u band (not corrected for
Galactic extinction) in nnomggies unit
(PSFFLUXu) (G2)
224-234 F11.6 3.63uJy Fg PSF flux in the g band (not corrected for
Galactic extinction) in nnomggies unit
(PSFFLUXg) (G2)
236-246 F11.6 3.63uJy Fr PSF flux in the r band (not corrected for
Galactic extinction) in nnomggies unit
(PSFFLUXr) (G2)
248-258 F11.6 3.63uJy Fi PSF flux in the i band (not corrected for
Galactic extinction) in nnomggies unit
(PSFFLUXi) (G2)
260-270 F11.6 3.63uJy Fz PSF flux in the z band (not corrected for
Galactic extinction) in nnomggies unit
(PSFFLUXz) (G2)
272-281 F10.6 --- IVFu Inverse variance of u flux (IVAR_PSFFLUXu)
283-292 F10.6 --- IVFg Inverse variance of g flux (IVAR_PSFFLUXg)
294-303 F10.6 --- IVFr Inverse variance of r flux (IVAR_PSFFLUXr)
305-314 F10.6 --- IVFi Inverse variance of i flux (IVAR_PSFFLUXi)
316-325 F10.6 --- IVFz Inverse variance of z flux (IVAR_PSFFLUXz)
327-335 F9.6 mag umag PSF magnitude in u band (not corrected for
Galactic extinction) (PSFMAGu)
337-345 F9.6 mag gmag PSF magnitude in g band (not corrected for
Galactic extinction) (PSFMAGg)
347-355 F9.6 mag rmag PSF magnitude in r band (not corrected for
Galactic extinction) (PSFMAGr)
357-365 F9.6 mag imag PSF magnitude in i band (not corrected for
Galactic extinction) (PSFMAGi)
367-375 F9.6 mag zmag PSF magnitude in z band (not corrected for
Galactic extinction) (PSFMAGz)
377-386 F10.6 mag e_umag Error in u PSF magnitude (ERR_PSFMAGu)
388-397 F10.6 mag e_gmag Error in g PSF magnitude (ERR_PSFMAGg)
399-408 F10.6 mag e_rmag Error in r PSF magnitude (ERR_PSFMAGr)
410-419 F10.6 mag e_imag Error in i PSF magnitude (ERR_PSFMAGi)
421-430 F10.6 mag e_zmag Error in z PSF magnitude (ERR_PSFMAGz)
432-439 F8.6 mag Extu Galactic extinction in u band
(EXTINCTIONu) (G8)
441-448 F8.6 mag Extg Galactic extinction in g band
(EXTINCTIONg) (G8)
450-457 F8.6 mag Extr Galactic extinction in r band
(EXTINCTIONr) (G8)
459-466 F8.6 mag Exti Galactic extinction in i band
(EXTINCTIONi) (G8)
468-475 F8.6 mag Extz Galactic extinction in z band
(EXTINCTIONz) (G8)
477-485 F9.6 --- SNRspec Median signal-to-noise ratio per pixel
over the whole spectrum (SNR_SPEC)
487-496 F10.6 --- SNR1700 Median signal-to-noise ratio per pixel in
the window 1650-1750Å (rest frame)
(SNR_1700)
498-506 F9.6 --- SNR3000 Median signal-to-noise ratio per pixel in
the window 2950-3050Å (rest frame)
(SNR_3000)
508-517 F10.4 km/s BI(CIVt) ?=-1 Balnicity Index (BI) (BI_CIV)
519-528 F10.4 km/s e_BI(CIVt) ?=-1 Error on Balnicity index (ERRBICIV)
530-531 I2 --- N2t Number of troughs wider than 2000km/s
(NCIV_2000)
533-542 F10.4 --- Vmin2t1 Minimum velocity of each detected
absorption trough (VMINCIV2000_1)
544-553 F10.4 --- Vmin2t2 Minimum velocity of each detected
absorption trough (VMINCIV2000_2)
555-564 F10.4 --- Vmin2t3 Minimum velocity of each detected
absorption trough (VMINCIV2000_3)
566-575 F10.4 --- Vmin2t4 Minimum velocity of each detected
absorption trough (VMINCIV2000_4)
577-586 F10.4 --- Vmin2t5 Minimum velocity of each detected
absorption trough (VMINCIV2000_5)
588-597 F10.4 --- Vmax2t1 Maximum velocity of each detected
absorption trough (VMAXCIV2000_1)
599-608 F10.4 --- Vmax2t2 Maximum velocity of each detected
absorption trough (VMAXCIV2000_2)
610-619 F10.4 --- Vmax2t3 Maximum velocity of each detected
absorption trough (VMAXCIV2000_3)
621-630 F10.4 --- Vmax2t4 Maximum velocity of each detected
absorption trough (VMAXCIV2000_4)
632-641 F10.4 --- Vmax2t5 Maximum velocity of each detected
absorption trough (VMAXCIV2000_5)
643-652 F10.4 km/s posmin2t1 Position of the minimum of each absorption
trough (POSMINCIV2000_1)
654-663 F10.4 km/s posmin2t2 Position of the minimum of each absorption
trough (POSMINCIV2000_2)
665-674 F10.4 km/s posmin2t3 Position of the minimum of each absorption
trough (POSMINCIV2000_3)
676-685 F10.4 km/s posmin2t4 Position of the minimum of each absorption
trough (POSMINCIV2000_4)
687-696 F10.4 km/s posmin2t5 Position of the minimum of each absorption
trough (POSMINCIV2000_5)
698-707 F10.4 --- Fmin2t1 Normalized flux density at the minimum of
each absorption trough (FMINCIV2000_1)
709-718 F10.4 --- Fmin2t2 Normalized flux density at the minimum of
each absorption trough (FMINCIV2000_2)
720-729 F10.4 --- Fmin2t3 Normalized flux density at the minimum of
each absorption trough (FMINCIV2000_3)
731-740 F10.4 --- Fmin2t4 Normalized flux density at the minimum of
each absorption trough (FMINCIV2000_4)
742-751 F10.4 --- Fmin2t5 Normalized flux density at the minimum of
each absorption trough (FMINCIV2000_5)
753-762 F10.4 km/s AI(CIVt) ?=-1 Absorption index (AI) (AI_CIV)
764-773 F10.4 km/s e_AI(CIVt) ?=-1 Error on absorption index
(ERRAICIV)
775-777 I3 --- N.45t ?=-1 Number of absorption trough wider
than 450km/s (NCIV_450)
778-788 F11.4 --- Vmin.45t1 ?=-1 Minimum velocity of first detected
absorption trough (VMINCIV450)
789-964 16F11.4 --- Vmin.45to ?=-1 Minimum velocity of others detected
absorption troughs (VMINCIV450)
965-975 F11.4 --- Vmax.45t1 ?=-1 Maximum velocity of first detected
absorption trough (VMAXCIV450)
976-1151 16F11.4 --- Vmax.45to ?=-1 Maximum velocity of other detected
absorption troughs (VMAXCIV450)
1152-1162 F11.4 km/s posmin.45t1 ?=-1 Position of the minimum of first
absorption trough (POSMINCIV450)
1163-1338 16F11.4 km/s posmin.45to ?=-1 Position of the minimum of other
absorption troughs (POSMINCIV450)
1339-1349 F11.4 --- Fmin.45t1 ?=-1 Normalized flux density at the
minimum of first absorption trough
(FMINCIV450)
1350-1525 16F11.4 --- Fmin.45to ?=-1 Normalized flux density at the
minimum of other absorption troughs
(FMINCIV450)
Byte-by-byte Description of file: dr12qsp.dat dr12qspb.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) corrected by CDS (SDSS_NAMEc) (G1)
20- 37 A18 --- SDSSo SDSS-DR12 designation HHMMSS.ss+DDMMSS.s
(J2000) (SDSS_NAME) (G1)
39- 48 F10.6 deg RAdeg Right Ascension (J2000) (RA)
50- 59 F10.6 deg DEdeg Declination (J2000) (DEC)
61- 70 I10 --- THINGID Thing_ID (THING_ID)
72- 75 I4 --- Plate Spectroscopic Plate number (PLATE)
77- 81 I5 --- MJD Spectroscopic MJD (MJD)
83- 86 I4 --- Fiber Spectroscopic Fiber number (FIBERID)
88- 95 F8.6 --- z.v Redshift from visual inspection (Z_VI)
97-105 F9.6 --- z.b ?=-1 Redshift from BOSS pipeline (Z_PIPE)
107-116 F10.6 --- e_z.b []?=-1 Error on BOSS pipeline redshift
(error codes -4, -5, -6) (ERR_ZPIPE)
118-120 I3 --- f_z.b ZWARNING flag|(ZWARNING) (G4)
122-123 I2 --- Morph SDSS morphology flag
0=point source 1=extended|(SDSS_MORPHO)
125-138 I14 --- Btarg1 BOSS target flag for main survey
(BOSS_TARGET1)
140-158 I19 --- Atarg1 BOSS target flag for ancillary programs
(ANCILLARY_TARGET1)
160-178 I19 --- Atarg2 BOSS target flag for ancillary programs
(ANCILLARY_TARGET2)
180-189 I10 --- eBtarg0 Target selection flag for eBOSS pilot survey
(EBOSS_TARGET0)
191 I1 --- BAL-VI BAL flag from visual inspection|(BALFLAGVI)
193-211 A19 --- objID SDSS Object Identification Number|(OBJ_ID)
213-223 F11.6 3.63uJy Fu ?=0 PSF flux in u band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXu)(G2)
225-235 F11.6 3.63uJy Fg ?=0 PSF flux in g band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXg)(G2)
237-247 F11.6 3.63uJy Fr ?=0 PSF flux in r band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXr)(G2)
249-259 F11.6 3.63uJy Fi ?=0 PSF flux in i band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXi)(G2)
261-271 F11.6 3.63uJy Fz ?=0 PSF flux in z band (not corrected
for Galactic extinction)
in nnomggies (PSFFLUXz)(G2)
273-282 F10.6 3.63uJy IVFu Inverse variance of PSF flux in u band
in nnomggies (IVAR_PSFFLUXu) (G2)
284-293 F10.6 3.63uJy IVFg Inverse variance of PSF flux in g band
in nnomggies (IVAR_PSFFLUXg) (G2)
295-304 F10.6 3.63uJy IVFr Inverse variance of PSF flux in r band
in nnomggies (IVAR_PSFFLUXr) (G2)
306-315 F10.6 3.63uJy IVFi Inverse variance of PSF flux in i band
in nnomggies (IVAR_PSFFLUXi) (G2)
317-326 F10.6 3.63uJy IVFz Inverse variance of PSF flux in z band
in nnomggies (G2) (IVAR_PSFFLUXz)
328-336 F9.6 mag umag PSF magnitude in u band (not corrected for
Galactic extinction) (PSFMAGu)
338-346 F9.6 mag gmag PSF magnitude in g band (not corrected for
Galactic extinction) (PSFMAGg)
348-356 F9.6 mag rmag PSF magnitude in r band (not corrected for
Galactic extinction) (PSFMAGr)
358-366 F9.6 mag imag PSF magnitude in i band (not corrected for
Galactic extinction) (PSFMAGi)
368-376 F9.6 mag zmag PSF magnitude in z band (not corrected for
Galactic extinction) (PSFMAGz)
378-386 F9.6 mag e_umag Error in PSF magnitude in u band (ERR_PSFMAGu)
388-396 F9.6 mag e_gmag Error in PSF magnitude in g band (ERR_PSFMAGg)
398-406 F9.6 mag e_rmag Error in PSF magnitude in r band (ERR_PSFMAGr)
408-416 F9.6 mag e_imag Error in PSF magnitude in i band (ERR_PSFMAGi)
418-426 F9.6 mag e_zmag Error in PSF magnitude in z band (ERR_PSFMAGz)
428-436 F9.6 mag Extu Galactic extinction in u band
(EXTINCTIONu) (G8)
438-446 F9.6 mag Extg Galactic extinction in g band
(EXTINCTIONg) (G8)
448-456 F9.6 mag Extr Galactic extinction in r band
(EXTINCTIONr) (G8)
458-466 F9.6 mag Exti Galactic extinction in i band
(EXTINCTIONi) (G8)
468-476 F9.6 mag Extz Galactic extinction in z band
(EXTINCTIONz) (G8)
Global notes:
Note (G1): Some SDSS names were erroneous. The corrected names have been
added by CDS.
Note (G2): 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 (G3): 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 5{sigma} 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, H{beta}, or H{alpha} has
lineArea+3{sigma}(lineArea)<0)
128 [7] = the fiber was unplugged, so no spectrum obtained
Note (G4): 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)
Note (G5): See Dawson et al. 2013AJ....145...10D for the description
of the target selection flags.
Note (G6): quasars selected by XDQSO (eXtreme Deconvolution method):
a positive "uniform" flag indicates QSOs in a sufficiently
statistical sample for, e.g., clustering measurements.
1 indicates a core target, and 2 a quite complete core.
Note (G7): {Delta}(g-i) is the difference in (g-i), Galactic extinction
corrected, between the quasar and the mean of the quasars at that
redshift. {Delta}(g-i) is not defined for quasars at either z<0.12
or z>5.12.
Note (G8): from Schlegel et al. (1998ApJ...500..525S)
Note (G9): from Schlafly & Finkbeiner (2011ApJ...737..103S)
History:
Copied at http://www.sdss.org/dr12/algorithms/boss-dr12-quasar-catalog/
================================================================================
(End) Patricia Vannier [CDS] 28-Jun-2017