J/AJ/143/119 SDSS Quasar Lens Search. V. Final catalog (Inada+, 2012)
The Sloan Digital Sky Survey Quasar Lens Search.
V. Final catalog from the seventh data release.
Inada N., Oguri M., Shin M.-S., Kayo I., Strauss M.A., Morokuma T.,
Rusu C.E., Fukugita M., Kochanek C.S., Richards G.T., Schneider D.P.,
York D.G., Bahcall N.A., Frieman J.A., Hall P.B., White R.L.
<Astron. J., 143, 119 (2012)>
=2012AJ....143..119I 2012AJ....143..119I
ADC_Keywords: Surveys ; Gravitational lensing ; QSOs ; Spectroscopy ;
Redshifts ; Photometry, SDSS ; Photometry, RI
Keywords: cosmology: observations - gravitational lensing: strong -
quasars: general
Abstract:
We present the final statistical sample of lensed quasars from the
Sloan Digital Sky Survey (SDSS) Quasar Lens Search (SQLS). The
well-defined statistical lens sample consists of 26 lensed quasars
brighter than i=19.1 and in the redshift range of 0.6<z<2.2
selected from 50826 spectroscopically confirmed quasars in the SDSS
Data Release 7 (DR7), where we restrict the image separation range to
1"<θ<20" and the i-band magnitude differences in two images
to be smaller than 1.25mag. The SDSS-DR7 quasar catalog also contains
36 additional lenses identified with various techniques. In addition
to these lensed quasars, we have identified 81 pairs of quasars from
follow-up spectroscopy, 26 of which are physically associated binary
quasars. The statistical lens sample covers a wide range of image
separations, redshifts, and magnitudes, and therefore is suitable for
systematic studies of cosmological parameters and surveys of the
structure and evolution of galaxies and quasars.
Description:
We start with the 105783 quasars in the SDSS-DR7 quasar catalog
selected over 8000 deg2 (Schneider et al., 2010, Cat. VII/260,
superseded by Cat. VII/269). Our selection (see Section 2) lead to a
sample of 50836 source quasars.
174 new lensed quasar candidates were observed using various
telescopic facilities. The observations include optical imaging,
near-infrared imaging and optical spectroscopy, and are tabulated in
Tables 3 and 4.
Together with the results we reported in Paper II (Inada et al., 2008,
Cat. J/AJ/135/496) and Paper IV (Inada et al., 2010,
Cat. J/AJ/140/403), we have constructed a statistical sample of 26
lensed quasar (table 5).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 37 50836 Source quasars
table3.dat 119 54 DR7 morphologically selected candidates
table4.dat 119 243 DR7 color-selected candidates
table5.dat 134 26 DR7 statistical sample
table6.dat 134 36 DR7 additional lensed quasars
refs.dat 98 59 References
--------------------------------------------------------------------------------
See also:
II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/AJ/140/403 : SDSS Quasar Lens Search. IV. (Inada+, 2010)
J/MNRAS/392/19 : The 2dF-SDSS QSO survey (Croom+, 2009)
J/ApJS/176/19 : COSMOS: strong lens systems (Faure+, 2008)
J/ApJ/682/964 : Sloan lens ACS survey. V. (Bolton+, 2008)
J/ApJ/678/635 : Spectroscopy of quasar binary candidates (Myers+, 2008)
J/MNRAS/382/412 : Catalog of SDSS-DR5/2MASS spectroscopic quasars (Ofek, 2007)
J/ApJ/658/99 : Pairs of QSO in SDSS-DR4 (Myers+, 2007)
J/AJ/131/1 : Binary quasars in the SDSS (Hennawi+, 2006)
J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)
J/AJ/131/2788 : Redshifts in the SFQS survey (Jiang+, 2006)
J/ApJS/155/257 : NBC Quasar Candidate Catalog (Richards+, 2004)
J/AJ/112/407 : The FIRST bright QSO survey (Gregg+, 1996)
J/ApJ/409/28 : Gravitationally Lensed Quasars (Maoz + 1993)
http://www.sdss.org/ : SDSS Home Page
http://cfa-www.harvard.edu/castles/ : CASTLES webpage
http://www-utap.phys.s.u-tokyo.ac.jp/~sdss/sqls/ : SQLS Web site
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS identifier (JHHMMSS.ss+DDMMSS.s)
25- 30 F6.4 --- z SDSS-DR7 quasar catalog (Cat. VII/260) redshift
32- 37 F6.3 mag imag [15.084/19.099] SDSS-DR7 quasar catalog i band
magnitude corrected for Galactic extinction
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[34].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS identifier
25- 29 F5.3 --- z ? Redshift (1)
31- 35 F5.2 mag imag [16.8/20.31] SDSS-DR7 quasar catalog
(Cat. VII/260) i-band PSF magnitude corrected
for Galactic extinction
37- 41 F5.2 arcsec theta ? Image separation θSDSS (2)
43- 46 F4.2 mag Di [0.02/2.21]? Absolute i-band magnitude
difference between the expected two
components |Δi| (3)
48- 79 A32 --- Image Instruments (and filters) used for the optical
and near-infrared imaging (4)
81- 85 A5 --- Spec Instruments used for the optical
spectroscopy (4)
87-113 A27 --- Com Comment
115-119 A5 --- Ref Reference (in refs.dat file)
--------------------------------------------------------------------------------
Note (1): redshifts are from the SDSS-DR7 quasar catalog (Cat. VII/260,
obsoleted by Cat. VII/269), or from follow-up spectroscopy (table4)
Note (2): image separation between the expected two components derived
from fitting the SDSS i-band image of each candidate with two PSFs
using GALFIT (table3). In table 4, the image separation between the
two components is from the SDSS imaging data.
Note (3): Derived from fitting the SDSS i-band image of each candidate
with two PSFs using GALFIT.
Note (4): Instrument as follows:
Te = Tek2k CCD at UH88;
Op = Optic CCD at UH88;
8k = UH8k at UH88;
WF = WFGS2 at UH88;
FO = FOCAS at Subaru;
SC = Suprime-Cam at Subaru;
IR = IRCS at Subaru;
SP = SPIcam at ARC 3.5m;
NF = NICFPS at ARC 3.5m;
GM = GMOS at Gemini North;
PA = PANIC at WB 6.5m;
DO = DOLORES at TNG 3.6m;
DA = DIS III at ARC 3.5m;
MS = MMT spectrograph;
MO = MOIRCS at Subaru.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[56].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS identifier
25 A1 --- f_SDSS [g] indicates a non-secure lens (1)
27 I1 --- N Number of images
29- 33 F5.3 --- zs Spectroscopic source redshift from SDSS data
35 A1 --- f_zl [*~] unsecure redshift (2)
36- 40 F5.3 --- zl Lens redshift
41 A1 --- u_zl [?] Uncertainty flag on zl
43- 47 F5.2 mag imag [15.3/20.14] SDSS PSF i band (AB) magnitude
corrected for Galactic extinction
49- 53 F5.2 arcsec thetaM Maximum image separations θmax derived
from the best imaging data.
55- 58 F4.2 --- Irat I-band flux ratio between the brightest
lensed image and the farthest lensed image
from the brightest image (3)
60- 64 F5.2 mag Imag [16.54/21.64]? I-band (Vega) magnitude of the
lensing galaxy (4)
66- 69 F4.2 mag e_Imag ? Statistical errors on Igal
71- 72 A2 --- --- [DR]
73 I1 --- DR [3/7] SDSS Data Release source (3, 5 or 7)
75- 89 A15 --- OName Other name (non-SDSS designation) (5)
91-120 A30 --- Reject The reason that each lens is excluded from the
statistical sample
122-134 A13 --- Ref Reference (see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
g = While our analysis indicates that this is a probable gravitational lens
system, its lensing nature is not as secure as the other lenses.
Note (2): Flag is:
* = Indicates lens redshifts measured from absorption lines in the quasar
spectra rather than direct spectroscopy of the lensing galaxy.
∼ = For lenses without any spectroscopic information, we provide an approximate
redshift with an error bar inferred from the color and magnitude.
Note (3): In table 5, the I-band flux ratio is derived from the discovery papers
for SQLS (SDSS quasar lens search) lenses, and from the best-quality
imaging data (mostly from the HST from the CASTLES Web site if
available) for previously known lenses.
Note (4): Without Galactic extinction corrections. When the system contains
multiple galaxies within the Einstein radius, the magnitude of the
brightest galaxy is shown.
Note (5): In table 5, LBQS 1333+0113 is a misprint for LBQS 1333+0133 and
SBS 0909+523 is a misprint for SBSG 0909+532; corrected at CDS.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 45 A22 --- Aut Author's name
47- 98 A52 --- Com Comments
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Oguri et al. Paper I. 2006AJ....132..999O 2006AJ....132..999O Cat. J/AJ/132/999
Inada et al. Paper II. 2008AJ....135..496I 2008AJ....135..496I Cat. J/AJ/135/496
Oguri et al. Paper III. 2008AJ....135..512O 2008AJ....135..512O
Inada et al. Paper IV. 2010AJ....140..403I 2010AJ....140..403I Cat. J/AJ/140/403
Oguri et al. Paper VI. 2012AJ....143..120O 2012AJ....143..120O
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 06-Jun-2013