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J/ApJ/682/964       Sloan lens ACS survey. V.                (Bolton+, 2008)

The Sloan lens ACS survey. V. The full ACS strong-lens sample. Bolton A.S., Burles S., Koopmans L.V.E., Treu T., Gavazzi R., Moustakas L.A., Wayth R., Schlegel D.J. <Astrophys. J., 682, 964-984 (2008)> =2008ApJ...682..964B
ADC_Keywords: Gravitational lensing ; Redshifts ; Photometry, SDSS Keywords: galaxies: elliptical and lenticular, cD - gravitational lensing - surveys Abstract: We present the definitive data for the full sample of 131 strong gravitational lens candidates observed with the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope by the Sloan Lens ACS (SLACS) Survey. All targets were selected for higher redshift emission lines and lower redshift continuum in a single Sloan Digital Sky Survey (SDSS) spectrum. Description: The gravitational lenses presented in this work were all selected from the spectroscopic database of the SDSS based on the presence of absorption-dominated galaxy continuum at one redshift and nebular emission lines (Balmer series, [OII] 3727, or [OIII] 5007) at another, higher redshift. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 113 131 SLACS HST-ACS target observational data notes.dat 79 10 Notes (table 6 of the paper) table5.dat 64 63 SLACS HST-ACS grade-A strong lens model parameters
See also: J/A+A/501/461 : Photometric masses of early-type lens galaxies (Grillo+, 2009) : SDSS Home Page Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS name ( (1) 20- 23 I4 --- Plate SDSS Plate number 24 A1 --- --- [-] 25- 29 I5 --- MJD SDSS MJD number 30 A1 --- --- [-] 31- 33 I3 --- Fiber SDSS Fiber number 35- 40 F6.4 --- zFG Foreground galaxy redshift (directly from SDSS database) 42- 47 F6.4 --- zBG Background galaxy redshift (measured as described in Bolton et al. 2004AJ....127.1860B) 49- 53 F5.2 mag Imag ?=- HST-ACS I814 magnitude (2) 54 A1 --- n_Imag [sd] Origin of Imag (3) 56- 59 F4.2 mag AI I-band Galactic dust extinction values (4) 61- 65 F5.1 GsolLum L(V555) ?=- Rest-frame luminosity in V555 band (5) 67- 71 F5.2 arcsec Re ?=- Effective radius (6) 73- 77 F5.3 --- Le2/LdV ?=- Ratio of luminosity within Re/2 as determined from B-spline models to total de Vaucouleurs model luminosity 79- 82 F4.2 --- b/a ?=- Ratio of minor to major axes for the de Vaucouleurs image models 84- 88 F5.1 deg PA ?=- de Vaucouleurs major-axis position angle measured east from north 90- 92 I3 km/s sigma ?=- Velocity dispersion, uncorrected for aperture effects 94- 95 I2 km/s e_sigma ?=- rms uncertainty on sigma (7) 97 A1 --- Mph [ELU] Foreground-galaxy morphology code (8) 98 A1 --- --- [-] 99 A1 --- Mul [MS] Foreground-galaxy multiplicity code (9) 100 A1 --- --- [-] 101 A1 --- Lens [AXB] Lens status code (10) 102 A1 --- n_Lens [*] Note on Lens status in notes.dat file (11) 104-113 A10 --- Name System name (JHHMM-DDMM), as in table5
Note (1): Nomenclature note: Sources identified as SLACS BG N.NNNN, where BG N.NNNN is the Background galaxy redshift (zBG). Note (2): Apparent magnitudes I814 are from HST-ACS de Vaucouleurs models, and are quoted in the AB system without correction for Galactic extinction. Note (3): Note as follows: s = magnitudes are measured from 420-s Snapshot exposures (s for snap) d = magnitudes are measured from full-orbit multi-exposure images (d for deep) Note (4): I-band Galactic dust extinction values based on Schlegel et al. 1998ApJ...500..525S1998) maps are given separately, and should be subtracted from observed magnitudes to give dust-corrected magnitudes. Note (5): Rest-frame luminosities LV555 are as computed from I814 with corrections for Galactic extinction, evolution, k-correction, and cosmological distance modulus as described in the text, assuming an absolute solar AB magnitude of V555,☉=4.83. Note (6): Effective radii Re are measured from de Vaucouleurs image models, and quoted at the intermediate axis. Note (7): Reported errors are limited to a minimum of 0.05sigma. No sigma values are reported for systems whose median S/N is less than 10 over the range of rest-frame wavelengths used for the fit, or for systems with multiple foreground galaxies. Note (8): Morphology is coded as follows: E = for early-type (elliptical and S0) L = for late-type (Sa and later) U = for unclassified (galaxies that cannot be unambiguously classed as early- or late-type based on the HST-ACS data) Note (9): Multiplicity is S=single, M=multiple Note (10): Lens status is coded as follows: A = for systems with clear and convincing evidence of multiple imaging B = for systems with strong evidence of multiple imaging but insufficient S/N for definite conclusion and/or modeling X = for all other systems (non-lenses and non-detections) Note (11): definite lenses, but are not modeled for reasons specified in notes.dat file
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [SDSS] 6- 15 A10 --- Name System name (JHHMM+DDMM) 17- 79 A63 --- Note Test of the note
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 10 A10 ---- Name System name (JHHMM-DDMM) 12- 15 F4.2 arcsec bSIE SIE (singularisothermal elliposoid) Einstein radius, quoted for an intermediate-axis normalization 17- 20 F4.2 --- qSIE Mass minor-to-major axis ratios of SIE models 22- 26 F5.1 deg PASIE Position angle (of SIE major axis), measured in degrees east of north 28- 32 F5.3 --- LSIE/LdV Luminosity enclosed within SIE Einstein radii (1) 34- 37 F4.2 arcsec bLTM LTM Einstein radius, quoted for an intermediate-axis normalization 39- 42 F4.2 --- gammaLTM External shear value for LTM models 44- 48 F5.1 deg PAgLTM Position angle (of LTM external shear), measured in degrees east of north 50- 54 F5.3 --- LLTM/LdV Luminosity enclosed within LTM Einstein radii (1) 56 I1 --- Nsrc Number of source-plane components used to model background galaxy 58- 60 A3 --- Ring? [Yes/No ] Ring subset? (2) 62- 64 A3 --- Good? [Yes/No ] Good sigmaSDSS ? (3)
Note (1): Evaluated using B-spline luminosity models, as a fraction of de Vaucouleurs total model luminosity. Note (2): "Ring Subset?" column indicates whether lens is included in the subset of systems with full or partial Einstein-ring lensed images Note (3): "Good sigmaSDSS ?" column indicates whether velocity dispersion is well-measured in SDSS data.
History: From electronic version of the journal References; Bolton et al., Paper I 2006ApJ...638..703B Treu et al., Paper II 2006ApJ...640..662T Koopmans et al., Paper III 2006ApJ...649..599K Gavazzi et al., Papar IV 2007ApJ...667..176G Gavazzi et al., Papar VI 2008ApJ...677.1046G Bolton et al., Paper VII 2008ApJ...684..248B
(End) Patricia Vannier [CDS] 31-Aug-2009
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