J/ApJ/781/2ivo://CDS.VizieR/J/ApJ/781/2doi:10.26093/cds/vizier.17810002CDSAmmons S.M.Wong K.C.Zabludoff A.I.Keeton C.R.2017-09-22T16:15:48Z2015-11-16T13:03:22ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiescatalogsspectroscopyredshiftedvisible-astronomysloan-photometryLines of sight with multiple projected cluster-scale gravitational lenses have high total masses and complex lens plane interactions that can boost the area of magnification, or etendue, making detection of faint background sources more likely than elsewhere. To identify these new "compound" cosmic telescopes, we have found directions in the sky with the highest integrated mass densities, as traced by the projected concentrations of luminous red galaxies (LRGs). We use new galaxy spectroscopy to derive preliminary magnification maps for two such lines of sight with total mass exceeding ~3x10^15^M_{sun}_. From 1151 MMT Hectospec spectra of galaxies down to i_AB_=21.2, we identify two to three group- and cluster-scale halos in each beam. These are well traced by LRGs. The majority of the mass in beam J085007.6+360428 (0850) is contributed by Zwicky 1953, a massive cluster at z=0.3774, whereas beam J130657.5+463219 (1306) is composed of three halos with virial masses of 6x10^14^-2x10^15^M_{sun}_, one of which is A1682. The magnification maps derived from our mass models based on spectroscopy and Sloan Digital Sky Survey photometry alone display substantial etendue: the 68% confidence bands on the lens plane area with magnification exceeding 10 for a source plane of z_s_=10 are [1.2,3.8]arcmin^2^ for 0850 and [2.3,6.7]arcmin^2^ for 1306. In deep Subaru Suprime-Cam imaging of beam 0850, we serendipitously discover a candidate multiply imaged V-dropout source at z_phot_=5.03. The location of the candidate multiply imaged arcs is consistent with the critical curves for a source plane of z=5.03 predicted by our mass model. Incorporating the position of the candidate multiply imaged galaxy as a constraint on the critical curve location in 0850 narrows the 68% confidence band on the lens plane area with {mu}>10 and z_s_=10 to [1.8,4.2]arcmin^2^, an etendue range comparable to that of MACS 0717+3745 and El Gordo, two of the most powerful single cluster lenses known. The significant lensing power of our beams makes them powerful probes of reionization and galaxy formation in the early universe.2014ApJ...781....2Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/781/2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)VII/110 : Rich Clusters of Galaxies (Abell+ 1989)VII/190 : Zwicky Galaxy Catalog (Zwicky+ 1968)J/ApJ/769/52 : SDSS luminous red galaxies concentrations (Wong+, 2013)J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)J/A+A/535/A4 : X-ray galaxy clusters study (Reichert+, 2011)J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)J/ApJS/183/197 : Galaxy clusters identified from the SDSS-DR6 (Wen+, 2009)J/ApJS/182/12 : ICM entropy profiles (ACCEPT) (Cavagnolo+, 2009)J/ApJS/174/117 : Properties and metal abundances of clusters (Maughan+, 2008)J/ApJ/682/821 : Spectral fits of galaxy clusters in X-ray (Cavagnolo+, 2008)J/ApJ/660/239 : MaxBCG catalog of 13823 SDSS galaxy clusters (Koester+, 2007)J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003)J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)J/MNRAS/306/857 : ROSAT Brightest Cluster Sample. III. (Crawford+, 1999)J/MNRAS/301/881 : The ROSAT brightest cluster sample - I. (Ebeling+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/781/2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/781/2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/781/2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/781/2https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/781/2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/781/2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/781/2/table1 (Beam properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/781/2/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/781/2/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/781/2/table1?GETtext/xml+votable180.050000true132.53336.07047220.005555555555555556Cone search capability for table J/ApJ/781/2/table2 (Spectroscopic data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/781/2/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/781/2/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/781/2/table2?GETtext/xml+votable180.050000true132.641833336.01541670.0055555555555555565/2760 6/5094 51002.381800341673347e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/781/2?format=asciiOpticaldefaultJ/ApJ/781/2/table1Beam propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShort beam name (HHMM format) (1)meta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (2)pos.eq.dec;meta.mainLXX-ray luminosity (in 10^44^erg/s) (3)1e+37Wphys.luminosity;em.X-rayfloatLlrgTotal Luminous Red Galaxy (LRG) luminosity (2)1e+11solLumphys.luminosityfloatNlrgNumber of LRGs (2)meta.numberintClusterMost massive cluster (4)meta.notecharJ/ApJ/781/2/table2Spectroscopic dataSimbadNameSimbad column added by the CDSmeta.idcharSloanDisplay the SDSS data for this galaxymeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainz[0/1] Heliocentric redshift (1)src.redshiftdoublee_zError in z (1)stat.error;src.redshiftdoubleimag[14.4/22] SDSS AB i-band magnitude (1)magphot.mag;em.opt.IfloatSDSSDisplay the data from SDSS DR9 photometric catalog (cat. V/139)meta.ref.urlchar