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J/ApJ/723/1678              LensPerfect A1689 analysis              (Coe+, 2010)

A high-resolution mass map of galaxy cluster substructure: LensPerfect analysis of A1689. Coe D., Benitez N., Broadhurst T., Moustakas L.A. <Astrophys. J., 723, 1678-1702 (2010)> =2010ApJ...723.1678C
ADC_Keywords: Gravitational lensing ; Redshifts ; Clusters, galaxy ; Photometry, HST Keywords: dark matter - galaxies: clusters: general - methods: data analysis - galaxies: clusters: individual (A1689) - gravitational lensing: strong - gravitational lensing: weak Abstract: We present a strong lensing (SL) mass model of A1689 which resolves substructures an estimated 25kpc across within the central ∼400kpc diameter. We achieve this resolution by perfectly reproducing the observed (strongly lensed) input positions of 168 multiple images of 55 knots residing within 135 images of 42 galaxies. Our model makes no assumptions about light tracing mass, yet we reproduce the brightest visible structures with some slight deviations. A1689 remains one of the strongest known lenses on the sky, with an Einstein radius of RE=47.0±1.2" (143+3-4kpc) for a lensed source at zs=2. We find that a single Navarro-Frenk-White (NFW) or Sersic profile yields a good fit simultaneously (with only slight tension) to both our SL mass model and published weak lensing (WL) measurements at larger radius (out to the virial radius). Our SL model prefers slightly higher concentrations than previous SL models, bringing our SL+WL constraints in line with other recent derivations. Our results support those of previous studies which find A1689 has either an anomalously large concentration or significant extra mass along the line of sight (perhaps in part due to triaxiality). Description: A1689 (13:11:30.13-01:20:16.2 (J2000)) has been observed in four filters (g'r'i'z') with ACS/WFC and eight more (UBVRIJHKs) from the ground (DuPont Telescope, U Johnson; NOT, B; KeckII/LRIS, VRI and ESO NTT/SOFI, JKs and H Johnson). More details about the ACS observations can be found in Broadhurst et al., 2005, Cat. J/ApJ/621/53. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 49 113 Spectroscopic redshifts of galaxies within the ACS field of view of A1689 used for our photometric redshift tests table5.dat 107 135 Multiple images produced by A1689 of 42 galaxies (corrected version, see table A1 in arXiv:1402.4170) table6.dat 40 33 Extra knots identified in the multiple images table7.dat 39 42 Multiple image systems
See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) J/MNRAS/384/1611 : Submm observations in gravitational lenses (Knudsen+, 2008) J/ApJ/668/643 : Multiply imaged gravitational lens systems (Limousin+, 2007) J/ApJ/665/921 : Redshift survey in the field of A1689 (Frye+, 2007) J/MNRAS/372/1425 : Gravitational lensing analysis of A1689 (Halkola+, 2006) J/ApJ/621/53 : Multiple arc systems in A1689 (Broadhurst+, 2005) J/ApJ/627/32 : Gravitationally lensed arcs in the HST WFPC2 archive (Sand+, 2005) J/MNRAS/335/10 : Hα survey of Abell 1689 (Balogh+, 2002) J/A+A/382/60 : BVR photometry in Abell 1689 (Duc+, 2002) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Gal [1/452] Galaxy running sequence number 5- 6 I2 h RAh [13] Hour of right ascension (J2000) (1) 8- 9 I2 min RAm [11] Minute of right ascension (J2000) 11- 16 F6.3 s RAs Second of right ascension (J2000) 18 A1 --- DE- [-] Sign of declination (J2000) (1) 19 I1 deg DEd [1] Degree of declination (J2000) (1) 21- 22 I2 arcmin DEm [18/22] Arcminute of declination (J2000) 24- 29 F6.3 arcsec DEs Arcsecond of declination (J2000) 31- 40 A10 --- r_zsp Redshift survey reference (2) 42 A1 --- M [*] *: galaxies designated as "spectroscopically confirmed cluster members" in each survey 44- 49 F6.4 --- zsp [0/5.12] Spectroscopic redshift
Note (1): Slight modifications have been made to the previously published coordinates where necessary. Note (2): Redshift surveys are the following: Balogh = Balogh et al. (2002, Cat. J/MNRAS/335/10; <[BCS2002] NNN> in Simbad) MOS = Duc et al. 2002, Cat. J/A+A/382/60. (<[DPF2002] NN> or <[DPF2002] JHHMMSS.ss+DDMMSS.s> in Simbad Teague = Teague et al. (1990ApJS...72..715T, <TCG ACO 1689 NNNa> in Simbad) Broadhurst = Broadhurst et al. (2005, Cat. J/ApJ/621/53, <[BBC2005] NN.N> in Simbad) Frye = Frye et al. (2002ApJ...568..558F, <[FBB2002] A1689 N> in Simbad; 2007, Cat. J/ApJ/665/921, <[FCB2007] JHHMMSS.sss+DDMMSS.ss> in Simbad) Mieske = Mieske et al. 2005A&A...430L..25M (<[MIH2005] N> in Simbad)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 2 I2 --- ID [1/50] Galaxy number as in table 7 3 A1 --- im [a-i] Image identification 5- 8 A4 --- B05 Broadhurst et al. ([BBC2005]) identification (1) 10- 13 I4 pix x Pixel coordinate in x (G1) 15- 18 I4 pix y Pixel coordinate in y (G1) 20- 21 I2 h RAh [13] Hour of right ascension (J2000) 23- 24 I2 min RAm [11] Minute of right ascension (J2000) 26- 31 F6.3 s RAs Second of right ascension (J2000) 33 A1 --- DE- [-] Sign of declination (J2000) 34 I1 deg DEd [1] Degree of declination (J2000) 36- 37 I2 arcmin DEm [19/21] Arcminute of declination (J2000) 39- 43 F5.2 arcsec DEs Arcsecond of declination (J2000) 45- 49 F5.2 mag i'mag ?=99 HST/ACS i'775 AB magnitude 51- 54 F4.2 mag e_i'mag ? i'mag uncertainty 56- 60 F5.1 --- mu Final magnification (2) 62- 65 F4.1 --- <mu> ? Mean magnification (2) 67- 71 F5.1 --- E_<mu> ? Positive error in <mu> 73- 76 F4.1 --- e_<mu> ? Negative error in <mu> 78 A1 --- f_zsp [(] (: assumed from other multiple image(s) 79- 82 F4.2 --- zsp ? Spectroscopic redshift (3) 84- 86 A3 --- r_zsp zsp reference(s) (G2) 88- 91 F4.2 --- zph Photometric redshift (3)(4) 93- 96 F4.2 --- E_zph Positive error in zph 98-101 F4.2 --- e_zph Negative error in zph 103-107 F5.1 --- Chi2 χ2 model fit (5)
Note (1): Flag in this column as follows: a = agreement with the numbering system of Broadhurst et al. (2005, Cat. J/ApJ/621/53, <[BBC2005] NN.N> in Simbad) where our 1a is their 1.1, etc.). L = a system added by L06 (Limousin et al., 2007, Cat. J/ApJ/668/643) = (blank) a system added in this paper HL = systems that were added by Halkola et al., 2006, Cat. J/MNRAS/372/1425, but for which we use L06's numbering (Limousin et al., 2007, Cat. J/ApJ/668/643, <[BBC2005] NN.N> in Simbad). Note (2): Magnification in final model and range across ensemble. Calculated as ratios of lensed and delensed image segment areas. Ranges are only given if the image is included in at least five models. Note (3): See also table 7 or galaxy input (spectroscopic/photometric) and output (lens model) redshifts. Note (4): Bayesian photometric redshift and 95% confidence interval. Based on fits to photometry across 12 filters without subtraction of cluster galaxies. Note (5): Poorness of BPZ fit: observed versus model fluxes with uncertainties.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 2 I2 --- ID [1/50] Galaxy number as in table 7 3 A1 --- im [a-i] Image identification 5 I1 --- Seq [1/3] Knot number 7- 10 I4 pix x Pixel coordinate in x (G1) 12- 15 I4 pix y Pixel coordinate in y (G1) 17- 18 I2 h RAh [13] Hour of right ascension (J2000) 20- 21 I2 min RAm [11] Minute of right ascension (J2000) 23- 28 F6.3 s RAs Second of right ascension (J2000) 30 A1 --- DE- [-] Sign of declination (J2000) 31 I1 deg DEd [1] Degree of declination (J2000) 33- 34 I2 arcmin DEm [19/21] Arcminute of declination (J2000) 36- 40 F5.2 arcsec DEs Arcsecond of declination (J2000)
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 2 I2 --- ID [1/50] Galaxy number (as in table 5 (NN)) 4 I1 --- Ni [2/6] Number of images 6 I1 --- Nk [1/3] Number of knots per image (1) 8- 9 I2 --- IO [1/42] Input order (1) 11- 14 F4.2 --- zsp ? Spectroscopic redshift 16- 18 A3 --- r_zsp zsp reference(s) (G2) 20- 24 A5 --- Tied Number(s) of system that are tied for redshift (2) 26- 29 F4.2 --- zi ? Input redshift (3) 31- 33 F3.1 --- e_zi ? zi uncertainty 35- 39 F5.3 --- zo Output redshift (4)
Note (1): Our mass model was built by iteratively adding our multiple image systems in the order given here. Any additional knots were added immediately after inclusion of the "main knot" for that system. Note (2): Redshifts of some systems are tied to other systems with numbers given here. (For example, the redshift of system 26 is tied to that of system 27 in the optimization.) Note (3): Input redshifts with rough uncertainties where allowed. (Spectroscopic redshifts are given zero uncertainty.) Note (4): Final model redshift, optimized if input value included uncertainty.
Global notes: Note (G1): Pixel coordinates (0.05pix-1) in the original APSIS-reduced ACS images (see Section 3.5). Note (G2): Reference(s) for zsp as follows: 1 = Frye et al. 2002ApJ...568..558F; 2 = Broadhurst et al. (2005, Cat. J/ApJ/621/53); 3 = Frye et al. 2007, Cat. J/ApJ/665/921; 4 = Limousin et al. 2007, Cat. J/ApJ/668/643
History: * 27-Jul-2012: From electronic version of the journal * 05-Sep-2012: Insert into VizieR * 27-Aug-2014: Coordinates corrected for 8 objects of table 5 mailed by the first author (the original table5 was renamed "table5.v00")
(End) Emmanuelle Perret [CDS] 27-Jul-2012
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