J/ApJ/844/78ivo://CDS.VizieR/J/ApJ/844/78doi:10.26093/cds/vizier.18440078CDSPaterno-Mahler R.Blanton E.L.Brodwin M.Ashby M.L.N.Golden-Marx E.,Decker B.Wing J.D.Anand G.2018-05-17T11:15:28Z2018-04-05T13:37:42ZCDS support team

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

cds-question@unistra.frgalaxy-clustersinfrared-photometryredshiftedradio-continuum-emissionquasarsWe present 190 galaxy cluster candidates (most at high redshift) based on galaxy overdensity measurements in the Spitzer/IRAC imaging of the fields surrounding 646 bent, double-lobed radio sources drawn from the Clusters Occupied by Bent Radio AGN (COBRA) Survey. The COBRA sources were chosen as objects in the Very Large Array FIRST survey that lack optical counterparts in the Sloan Digital Sky Survey to a limit of m_r_=22, making them likely to lie at high redshift. This is confirmed by our observations: the redshift distribution of COBRA sources with estimated redshifts peaks near z=1 and extends out to z~3. Cluster candidates were identified by comparing our target fields to a background field and searching for statistically significant (>=2{sigma}) excesses in the galaxy number counts surrounding the radio sources; 190 fields satisfy the >=2{sigma} limit. We find that 530 fields (82.0%) have a net positive excess of galaxies surrounding the radio source. Many of the fields with positive excesses but below the 2{sigma} cutoff are likely to be galaxy groups. Forty-one COBRA sources are quasars with known spectroscopic redshifts, which may be tracers of some of the most distant clusters known.2017ApJ...844...78Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/844/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974)II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)J/A+A/461/823 : Candidate Ly{alpha} emitting galaxies (Venemans+, 2007)J/ApJ/684/905 : z>1 gal. clusters from IRAC Shallow Survey (Eisenhardt+, 2008)J/ApJ/686/966 : Spitzer-FLS catalog of clusters of galaxies (Muzzin+, 2008)J/AJ/141/88 : Galaxy cluster environments of radio sources (Wing+, 2011)J/ApJ/769/79 : Spitzer obs. of radio-loud AGNs (CARLA) (Wylezalek+, 2013)J/ApJS/213/25 : WISE Massive & Distant Clusters (MaDCoWS) II. (Stanford+, 2014)J/ApJ/786/17 : Luminosity functions for 1.3<z<3.2 galaxies (Wylezalek+, 2014)J/ApJS/218/33 : Spitzer-CANDELS catalog within 5 deep fields (Ashby+, 2015)J/ApJS/216/27 : Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/844/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/844/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/844/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/844/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/844/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/844/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/844/78/table1 (COBRA cluster survey catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/844/78/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/844/78/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/844/78/table1?GETtext/xml+votable180.050000true5.549583-9.8369440.0055555555555555566/4134 4148 4161 4180 4184 4185 4220 4227 4264 4293 4341 4373 4379 4383 4387 4413 4417 4472 4490 4541 4572 4583 4594 4617 4627 4629 4630 4649 4712 4725 4732 4734 4742 4806 4817 4826 4843 4848 4851 4859 4863 4885 4905 4910 4914 4916 4928 4937 4940 4942 4945 4970 4996 5002 5010 5011 5018 5022 5032 5034 5064 5069 5088 5098 5108 5109 5117 5126 5137 5147 5169 5175 5181 5183 5195 5196 5206 5219 5227 5235 5242 5252 5258 5259 5261 5267 5274 5295 5299 5308 5333 5344 5377 5389 5409 5410 5423 5436 5440 5477 5480 5482 5498 5548 5564 5566 5567 5569 5586 5589 5593 5602 5620 5625 5634 5648 5667 5677 5682 5685 5697 5713 5733 5760 5809 5813 5865 5867 5899 5923 5929 5937 5947 5970 5975 6000 6028 6033 6114 6123 6130 6198 6215 6218 6245 6248 6252 6265 6291 6338 6351 6362 6366 6381 6404 6425 6426 6460 6472 6481 6497 6500 6505 6529 6531 6563 6565 6594 6628 6645 6918 6976 6980 7168 7180 7198 7201 7211 7229 7235 7238 7262 7281 7293 7306 7328 7334 7366 7367 7372 7376 7401 7408 7436 7449 7458 7462 7475 7562 8207 8229 8239 8270 8294 8310 8357 8367 8384 8407 8416 8420 8427 8438 8442 8459 8491 8513 8553 8563 8565 8592 8599 8615 8639 8650 8668 8691 8692 8708 8710 8722 8753 8780 8805 8830 8851 8861 8870 8884 8885 8893 8898 8903 8904 8921 8923 8938 8974 8978 8991 8992 9010 9031 9038 9050 9051 9053 9056 9063 9064 9074 9077 9086 9087 9095 9113 9132 9136 9181 9185 9242 9250 9302 9309 9314 9330 9384 9387 9388 9393 9423 9461 9465 9508 9513 9619 9623 9735 9777 9797 9820 9872 9904 9964 9970 9984 9987 9995 9997 10041 10063 10086 10087 10106 10125 10128 10185 10219 10246 10253 10272 10288 10304 10330 10345 10376 10380 10389 10403 10406 10433 10444 10458 10462 10485 10493 10495 10510 10531 10541 10577 10589 10601 10604 10611 10625 10629 10630 10667 10685 10693 10766 10783 10790 10796 10829 10882 10890 10892 10908 10911 10923 10924 10925 10932 10937 10949 10951 10969 10985 11001 11017 11019 11033 11078 11095 11096 11102 11106 11109 11135 11194 11207 11218 11244 11258 11265 11266 11281 11307 11314 11315 11320 11338 11339 11348 11349 11351 11373 11378 11423 11431 11463 11468 11590 11797 11798 11820 11849 11850 11907 17143 17231 17232 17321 17516 17558 17745 17746 17750 17763 17771 17807 17809 17810 17825 17828 17840 18006 18017 18023 18029 18065 18067 18536 18541 18590 18616 18625 18696 18749 18767 18771 18788 18793 18798 18830 18844 18850 18854 19023 19029 19043 19109 19121 19200 21838 21845 21847 21849 21874 21970 21971 22495 23207 23212 25839 25914 25944 25953 26004 26072 26084 26085 26090 26094 26099 26110 26166 26178 26213 26217 26229 26263 26343 26392 26398 26406 26411 26418 26419 26447 26463 26492 26493 26499 26505 26509 26511 26514 26533 26553 26584 26603 26866 26943 26981 26993 27028 27031 27048 27079 27081 27086 27089 27099 27100 27110 27134 27191 27195 27236 27294 27321 27358 27360 27374 27390 27412 27430 27471 27484 27520 27565 27579 27591 27603 27606 27616 27625 27633 27672 27677 27690 27714 27716 27721 27740 27753 27763 27768 27771 27778 27819 27844 27866 27882 27903 27912 27919 27928 27934 27941 27948 27988 28039 28057 28058 28059 28065 28109 28122 28124 28140 28144 28155 28177 28180 28197 28202 28214 28218 28258 28274 28339 28377 28384 28388 28391 28392 28396 28400 28402 28411 28414 28424 28436 28446 28461 28464 28511 28520 28521 28528 28533 28537 28542 28548 28558 28570 28585 28670 31289 31294 31311 31337 31352 31374 31393 31485 31527 31528 31658 31672 31707 31709 31723 31730 32447 32459 32485 32486 32672 36763 36808 36832 45050 45054 490189.932213363424795e-25 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/844/78?format=asciiInfraredRadiodefaultJ/ApJ/844/78/table1COBRA cluster survey catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[1/3] Source selection type (1)meta.codeintCOBRARadio source name (HHMMSS.s+DDMMSS; J2000)meta.id;meta.maincharRAJ2000? Hour of Right Ascension (J2000) (2)pos.eq.ranullableDEJ2000? Degree of Declination (J2000) (2)pos.eq.decnullableS20[2/1503] FIRST survey 20cm flux densitymJyphot.flux.density;em.radio.750-1500MHzfloat3.6mag[12.7/23.8]? Host Spitzer/IRAC 3.6um band mag as determined by SExtractor.magphot.mag;em.IR.3-4umfloatnullable3.6-4.5[-0.6/0.7]? Host Spitzer/IRAC 3.6-4.5um band color indexmagphot.color;em.IR;em.IRfloatnullablef_3.6-4.5Flag on 3.6-4.5 (3)meta.codecharz[0/3]? Redshift (4)src.redshiftfloatnullablef_zFlag on z (5)meta.codecharDelN1[-14/50] Overdensity within 1 arcminsrc.density;arith.ratiofloate_DelN1[3/9] Uncertainty in DelN1 (6)stat.errorfloatSig1[-2.2/7.8] Significance within 1 arcmin (7)stat.fit.goodnessfloatDelN2[-45/120] Overdensity within 2 arcminsrc.density;arith.ratiofloate_DelN2[8/16] Uncertainty in DelN2 (6)stat.errorfloatSig2[-3.1/8.1] Significance within 2 arcmin (7)stat.fit.goodnessfloatDR12Display the SDSS-DR12 data (V/147) within 3" of the optical/IR positionmeta.ref.urlcharFIRSTDisplay data from the FIRST catalog (VIII/92) within 3" from the radio positionmeta.ref.urlchar_RAPositions from the Radio source name (right ascension part)degpos.eq.ra;meta.main_DEPositions from the Radio source name (declination part)degpos.eq.dec;meta.main