J/ApJ/888/35ivo://CDS.VizieR/J/ApJ/888/35doi:10.26093/cds/vizier.18880035CDSChan B.M.Y.Broadhurst T.Lim J.Wong J.Diego J.M.Coe D.2021-09-29T09:07:56Z2021-07-09T12:58:41ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersgravitational-lensingredshiftedastronomical-modelsWe present an iterative method to construct a freeform lens model that self-consistently reproduces the sky positions, geometrically inferred redshifts, and relative brightnesses of all multiply lensed images toward a galaxy cluster. This method is applied to the cluster RXCJ2248.7-4431 (z=0.348) from the Hubble Frontier Fields program, toward which 10 multiply lensed sources with accurate spectroscopic redshifts and 6 others with inexact photometric redshifts have been identified. Using the spectroscopically secure systems to define an initial lens model, we compute the geometric redshifts of the photometric systems. We then iterate the lens model by incorporating the photometric systems at redshifts shifted by incremental amounts toward their geometric redshifts inferred from the previous step; on convergence, we find geometric redshifts in good agreement with the spectroscopically determined redshifts, but they can depart significantly from the photometrically determined redshifts. In the final lens model, all 16 lensed sources tightly follow the cosmological form of the angular diameter distance relation. Furthermore, although they are not used as model constraints, our lens model predicts relative brightnesses between image pairs for a given set of multiply lensed images in reasonable agreement with observations, thus providing independent validation of this model.2020ApJ...888...35Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/888/35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/621/53 : Multiple arc systems in A1689 (Broadhurst+, 2005)J/ApJ/668/643 : Multiply imaged gravitational lens systems (Limousin+, 2007)J/ApJS/176/19 : COSMOS: strong lens systems (Faure+, 2008)J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)J/A+A/546/A6 : Metal abundances of galaxy clusters (Andreon, 2012)J/ApJ/762/L30 : MCS J0416.1-2403 strong lensing analysis (Zitrin+, 2013)J/ApJ/792/76 : Lensed z~6-8 galaxies behind CLASH clusters (Bradley+, 2014)J/MNRAS/444/268 : HST Frontier Fields clusters (Richard+, 2014)J/MNRAS/446/683 : Free-form lensing grid solution for A1689 (Diego+, 2015)J/ApJ/801/44 : HST lensing analysis of the CLASH sample (Zitrin+, 2015)J/ApJ/819/114 : Lensing mass modeling of 4 HFF clusters (Kawamata+, 2016)J/ApJ/843/41 : HST/WFC3 obs. of z~2-8 gal. in HFF clusters (Bouwens+, 2017)J/ApJ/848/37 : HST UV-IR photometry in CLASH galaxy clusters (Connor+, 2017)J/ApJ/854/73 : Full-data results of HFF: galaxies z~6-9 (Ishigaki+, 2018)J/ApJ/862/156 : High-z galaxy cand. in the HFF cluster fields (Leung+, 2018)J/A+A/613/A72 : AS1063 and MACS1206-08 datacubes (Girard+, 2018)J/A+A/633/A139 : Abundances of RXC J2248.7-4431 galaxies (Ciocan+, 2020)J/A+A/636/A15 : X-ray galaxy cluster sample (Migkas+, 2020)J/A+A/643/A177 : Candidate Cluster Members with Deep learning (Angora+, 2020)J/A+A/646/A71 : CFHTLenS galaxy bias and redshift distribution (Simon+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/888/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/888/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/888/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/888/35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/888/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/888/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/888/35/table1 (Detailed information for individual lensed images in the cluster RXC J2248.7-4431)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/888/35/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/888/35/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/888/35/table1?GETtext/xml+votable180.050000true342.19445-44.527002780.0055555555555555566/46474 46496https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/888/35?format=asciidefaultJ/ApJ/888/35/table1Detailed information for individual lensed images in the cluster RXC J2248.7-4431NoteNotemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDImage identifier (1)meta.id;meta.maincharf_IDFlag on ID (2)meta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainzspec[0.7/6.2]? Spectroscopic redshift of the lensed systemsrc.redshiftfloatnullablezphot[0.9/3.8]? Photometric redshift for individual imagesrc.redshiftfloatnullableb_zphot[0.04/3.5]? Zphot lower limitmeta.notefloatnullableB_zphot[0.9/4.1]? Zphot upper limitmeta.notefloatnullableGeoz[0.8/7] Predicted geometric redshift for individual systemsrc.redshift;meta.modelledfloatmu[2/873] magnification ({mu} value)phot.flux;arith.ratiofloatCL[1/3] Confidence level (3=the highest) (3)meta.code.qualint