Paterno-Mahler, RachelRachelPaterno-MahlerSharon, KerenKerenSharonCoe, DanDanCoeMahler, GuillaumeGuillaumeMahlerCerny, CatherineCatherineCernyJohnson, Traci L.Traci L.JohnsonSchrabback, TimTimSchrabbackAndrade-Santos, FelipeFelipeAndrade-SantosAvila, Roberto J.Roberto J.AvilaBradač, MarušaMarušaBradačBradley, Larry D.Larry D.BradleyCarrasco, DanielaDanielaCarrascoCzakon, Nicole G.Nicole G.CzakonDawson, William A.William A.DawsonFrye, Brenda L.Brenda L.FryeHoag, Austin T.Austin T.HoagHuang, Kuang-HanKuang-HanHuangJones, ChristineChristineJonesLam, DanielDanielLamLivermore, RachaelRachaelLivermoreLOVISARI, LORENZOLORENZOLOVISARIMainali, RameshRameshMainaliOesch, Pascal A.Pascal A.OeschOgaz, SaraSaraOgazPast, MatthewMatthewPastPeterson, AveryAveryPetersonRyan, Russell E.Russell E.RyanSalmon, BrettBrettSalmonSendra-Server, IreneIreneSendra-ServerStark, Daniel P.Daniel P.StarkUmetsu, KeiichiKeiichiUmetsuVulcani, BenedettaBenedettaVulcaniZitrin, AdiAdiZitrin2020-10-272020-10-2720180004-637Xhttp://hdl.handle.net/20.500.12386/28020We present a lens model for the cluster SPT-CLJ0615-5746, which is the highest-redshift (z = 0.972) system in the Reionization of Lensing Clusters Survey, making it the highest-redshift cluster for which a full, strong lens model is published. We identify three systems of multiply imaged lensed galaxies, two of which we spectroscopically confirm at z = 1.358 and z = 4.013, which we use as constraints for the model. We find a foreground structure at z ∼ 0.4, which we include as a second cluster-sized halo in one of our models; however, two different statistical tests find the best-fit model consists of one cluster-sized halo combined with three individually optimized galaxy-sized halos, as well as contributions from the cluster galaxies themselves. We find the total projected mass density within r = 26.″7 (the region where the strong lensing constraints exist) to be M={2.51}<SUB>-0.09</SUB><SUP>+0.15</SUP>× {10}<SUP>14</SUP> M <SUB>☉</SUB>. If we extrapolate out to r <SUB>500</SUB>, our projected mass density is consistent with the mass inferred from weak lensing and from the Sunyaev-Zel’dovich effect (M ∼ 10<SUP>15</SUP> M <SUB>☉</SUB>). This cluster is lensing a previously reported z ∼ 10 galaxy, which, if spectroscopically confirmed, will be the highest-redshift strongly lensed galaxy known.STAMPAenArticle10.3847/1538-4357/aad2392-s2.0-85052375673000442222700016https://iopscience.iop.org/article/10.3847/1538-4357/aad2392018ApJ...863..154PFIS/05 - ASTRONOMIA E ASTROFISICA