J/AJ/130/968ivo://CDS.VizieR/J/AJ/130/968doi:10.26093/cds/vizier.51300968CDSMiller C.J.Nichol R.C.Reichart D.Wechsler R.H.Evrard A.E.,Annis J.McKay T.A.Bahcall N.A.Bernardi M.Boehringer H.,Connolly A.J.Goto T.Kniazev A.Lamb D.Postman M.Schneider D.P.,Sheth R.K.Voges W.2008-12-02T05:36:00Z2008-12-02T06:31:41ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedgalaxy-kinematicsWe present the C4 Cluster Catalog, a new sample of 748 clusters of galaxies identified in the spectroscopic sample of the Second Data Release (DR2, 2004AJ....128..502A) of the Sloan Digital Sky Survey (SDSS). The C4 cluster-finding algorithm identifies clusters as overdensities in a seven-dimensional position and color space, thus minimizing projection effects that have plagued previous optical cluster selection. The present C4 catalog covers ~2600deg^2^ of sky and ranges in redshift from z=0.02 to 0.17. The mean cluster membership is 36 galaxies (with measured redshifts) brighter than r=17.7, but the catalog includes a range of systems, from groups containing 10 members to massive clusters with over 200 cluster members with measured redshifts. The catalog provides a large number of measured cluster properties including sky location, mean redshift, galaxy membership, summed r-band optical luminosity (L_r_), and velocity dispersion, as well as quantitative measures of substructure and the surrounding large-scale environment. We use new, multicolor mock SDSS galaxy catalogs, empirically constructed from the {Lambda}CDM Hubble Volume (HV) Sky Survey output, to investigate the sensitivity of the C4 catalog to the various algorithm parameters (detection threshold, choice of passbands, and search aperture), as well as to quantify the purity and completeness of the C4 cluster catalog.2005AJ....130..968Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/130/968CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/130/968https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/130/968http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/130/968https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/130/968https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/130/968http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/130/968GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/130/968/table2 (The SDSS-C4 cluster catalog (DR2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/968/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/968/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/968/table2?GETtext/xml+votable180.050000true258.127264.01660.0055555555555555565/2052 2376 2952 4652 6549 6592 6805 6917 6921 6/1 523 554 4098 5102 5614 5622 5623 5625 5627 5629 5932 5933 5955 5956 5960 5964 6039 6045 6047 6049 6056 6067 6070 6071 6073 6076 6086 6088 6089 6090 6093 6095 6101 6140 6226 6227 6230 6436 6437 6445 6458 6471 6473 6485 6487 6515 6529 6532 6533 6535 6544 6546 6551 6554 6577 6605 6609 6611 6624 6640 6641 7220 7223 7224 7226 7228 7229 7230 7262 7263 7266 7267 7269 7270 7271 7277 7299 7301 7315 7317 7360 7372 7445 7452 7466 7476 7513 7516 7517 7536 7552 8199 8212 8214 8226 9303 9333 9471 9483 9508 9513 9514 9518 9601 9607 9613 9632 9650 9813 9815 9877 9913 9940 9941 9943 9949 9983 9987 10061 10114 10120 10144 10146 10147 10152 10179 10180 10211 10743 10749 10983 11001 11003 11005 11065 11133 11197 11198 11229 11240 11242 11245 11250 11251 11253 11254 11255 11257 11260 11341 11348 11349 11356 11357 11375 11426 11446 11473 11497 11498 11499 11502 11591 11602 11812 11816 11822 11833 11843 11907 11908 11912 11913 11915 11926 11930 11936 11937 11939 11942 11943 11947 11952 12375 12380 12404 17233 17237 17239 17300 17301 17303 17321 17493 17494 17498 17507 17508 17512 17513 17515 17556 17569 17570 17571 17572 17665 17810 17832 17841 17922 17981 17983 18003 18009 18019 18020 18022 18026 18028 18061 18062 18063 18072 18084 18086 18091 18176 18299 18367 18386 18388 18389 18395 18402 18410 18411 18412 18515 18521 18523 18535 18542 18583 18585 18586 18588 18589 18590 18606 18607 18616 18685 18686 18802 18840 18842 18850 18851 18854 18856 18860 18948 18960 19029 19044 19092 19114 19202 19424 19670 19674 19692 19696 19698 19700 19704 19740 19760 19761 19983 19987 19993 19996 20006 20016 20035 21847 21877 23057 23059 23192 23204 23208 25583 25593 25598 25823 25845 25846 25849 25851 25852 25854 25908 25911 25915 25917 25919 25930 25931 25942 25944 25952 25958 25959 25962 25964 25965 25970 26001 26017 26019 26022 26023 26042 26043 26048 26049 26051 26053 26054 26061 26063 26064 26067 26071 26075 26085 26087 26088 26143 26164 26167 26169 26173 26184 26185 26187 26188 26193 26194 26195 26200 26203 26206 26208 26215 26218 26221 26235 26238 26250 26271 26276 26298 26299 26300 26302 26304 26307 26313 26318 26339 26354 26360 26372 26373 26384 26385 26389 26406 26412 26432 26433 26434 26942 26943 26948 26949 26951 26962 26965 26982 26987 26989 26990 27037 27042 27045 27046 27048 27053 27054 27058 27060 27064 27070 27074 27081 27082 27084 27087 27219 27224 27225 27226 27228 27235 27239 27245 27246 27247 27248 27279 27325 27362 27394 27402 27406 27408 27417 27420 27649 27651 27660 27661 27664 27665 27672 27673 27676 27677 27689 27691 27692 27693 27694 27777 30038 31290 31291 31292 31319 31323 31324 31332 31333 31371 31378 31379 31384 31385 31394 31395 31396 31398 31401 31404 31406 31413 31415 31418 31419 31422 31435 31458 31464 32500 32501 32502 32508 32509 36725 36732 48988 48989 48990 49014 49091 49092 49097https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/130/968?format=asciiOpticaldefaultJ/AJ/130/968/table2The SDSS-C4 cluster catalog (DR2)DSDressler-Shectman substructure statistics (a low value indicates a significant substructure)stat.fit.paramfloatONamesOther names (5)meta.idcharSimbadget SIMBAD data about this clustermeta.ref.urlcharNEDget NED data about this clustermeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSS-C4Source SDSS C4 identificationmeta.id;meta.mainintRA1Right Ascension from Method 1 (J2000) (1)degpos.eq.ra;meta.mainDE1Declination from Method 1 (J2000) (1)degpos.eq.dec;meta.mainRA2degRight Ascension from Method 2 (J2000) (1)degpos.eq.raDE2degDeclination from Method 2 (J2000) (1)degpos.eq.decdoubleRAbdegRight Ascension of Brightest galaxy (J2000) (1)degpos.eq.raDEbdegDeclination of Brightest galaxy (J2000) (1)degpos.eq.decdoubleSDSSShow the brightest galaxy from the SDSSmeta.ref.urlcharzMean cluster redshiftsrc.redshiftdoublesigmaVelocity dispersion (2)km/sphys.veloc.dispersionintRichRichnessmeta.numberintLrSummed r-band cluster luminosity (3)solLumphys.luminositydoubleSCF[0,2] Structure Contamination Flag (4)meta.codeint