Northern Optical Cluster Survey. II. J/AJ/125/2064 ivo://CDS.VizieR/J/AJ/125/2064 doi:10.26093/cds/vizier.51252064 CDS Gal R.R. de Carvalho R.R. Lopes P.A.A. Djorgovski S.G. Brunner R.J.,Mahabal A. Odewahn S.C. 2023-04-06T16:50:54Z 2003-08-26T16:36:22Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr surveys galaxy-clusters redshifted We present a new, objectively defined catalog of candidate galaxy clusters based on the galaxy catalogs from the digitized Second Palomar Observatory Sky Survey. This cluster catalog, derived from the best calibrated plates in the high-latitude (|b|>30{deg}) northern Galactic cap region, covers 5800deg^2^ and contains 8155 candidate clusters. A simple adaptive kernel density mapping technique, combined with the SExtractor object detection algorithm, is used to detect galaxy overdensities, which we identify as clusters. Simulations of the background galaxy distribution and clusters of varying richnesses and redshifts allow us to optimize detection parameters and measure the completeness and contamination rates for our catalog. Cluster richnesses and photometric redshifts are measured, using integrated colors and magnitudes for each cluster. An extensive spectroscopic survey is used to confirm the photometric results. This catalog, with well-characterized sample properties, provides a sound basis for future studies of cluster physics and large-scale structure. 2003AJ....125.2064G https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/125/2064 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000) J/ApJS/115/1 : MX northern Abell cluster redshift survey (Slinglend+ 1998) J/AJ/128/1017 : Northern Optical Survey. IV. (Lopes+, 2004) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/125/2064 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/125/2064 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/125/2064 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/125/2064 https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/125/2064 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/125/2064 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/AJ/125/2064/table6 (The Northern Sky Cluster Catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/125/2064/table6? https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/125/2064/table6? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/125/2064/table6? 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31638 31640-31641 31644-31645 31647-31648 31651 31656-31657 31669-31670 31675-31676 31678-31679 31686-31687 31696-31697 31699 31704 31706 31708 31714 31717-31718 31720-31722 31724 31726-31727 31729 31733-31734 31738-31739 32270 32289 32297 32300 32302-32303 32306 32317-32319 32354 32360 32362 32389-32390 32394-32396 32398 32401 32407-32408 32411 32413 32415-32416 32418 32430-32432 32437 32439 32442 32452-32454 32461 32463 32465-32467 32476 32479-32480 32482 32485-32486 32489 32491-32492 32494-32495 32497-32498 32500-32501 32503 32505-32506 32508-32509 32511 32650 32672 32674-32675 32678 32681-32683 45045 45047 45052-45053 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/125/2064?format=ascii Optical default J/AJ/125/2064/table6 The Northern Sky Cluster Catalog recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NSC Cluster designation, JHHMMSS+DDMMSS (1) meta.id;meta.main char RAJ2000 Right ascension expressed in degrees (J2000) deg pos.eq.ra;meta.main DEJ2000 Declination expressed in degrees (J2000) deg pos.eq.dec;meta.main z Photometric redshift estimate (2) src.redshift float u_z [:] Uncertainty flag meta.code.error char Ngals Measured richness (3) meta.number float Nmaps Number of simulated maps in which the cluster was detected (4) meta.number int Plate POSS2 plate number from which the cluster is drawn obs.field int