J/MNRAS/274/1071ivo://CDS.VizieR/J/MNRAS/274/1071doi:10.26093/cds/vizier.72741071CDSCollins C.A.Guzzo L.Nichol R.C.Lumsden S.L.2024-06-24T20:14:29Z1998-09-07T14:27:57ZCDS support team

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

cds-question@unistra.frredshiftedgalaxy-clustersIn this paper, we present the redshifts of the galaxies and galaxy clusters which form the Edinburgh-Milano (EM) cluster redshift survey. A total of 777 galaxy redshifts have been measured in 94 clusters extracted from the digitized Edinburgh-Durham Cluster Catalogue. We also present the radial velocity dispersions for 37 clusters. Observational and data reduction techniques are discussed in detail, together with the strategy adopted to determine the mean redshift of a cluster and to identify and discard plausible phantom clusters. Some 10 per cent of our clusters show heavy contamination, indicating that projection is a serious problem for optically selected, rich clusters. The median velocity dispersion estimated for a subsample of richness R>=1 clusters is 742+/-63km/s. From a simple comparison with {OMEGA}=1 cold dark matter models of structure formation, these results favour a biasing parameter b=1.6-2.0 and are inconsistent with a bias outside of the range b=1.3-2.5.1995MNRAS.274.1071Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/274/1071CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/175 : Edingburgh-Durham Cluster Catalogue (Lumdsen+ 1992)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/274/1071https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/274/1071http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/274/1071https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/274/1071https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/274/1071http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/274/1071GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/274/1071/table2 (Results for galaxies in the survey with two independent observations either at the ESO 3.6-m and 2.2-m telescopes or at the AAT.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/274/1071/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/274/1071/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/274/1071/table2?GETtext/xml+votable180.050000true345.663638-33.3503520.005555555555555556Cone search capability for table J/MNRAS/274/1071/table3 (The galaxies observed in the EM cluster redshift survey ESO and AAT)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/274/1071/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/274/1071/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/274/1071/table3?GETtext/xml+votable180.050000true323.008716-22.5383650.005555555555555556Cone search capability for table J/MNRAS/274/1071/table4 (The clusters observed in the EM redshift survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/274/1071/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/274/1071/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/274/1071/table4?GETtext/xml+votable180.050000true323.102743-22.6622550.005555555555555556Cone search capability for table J/MNRAS/274/1071/table5 (*List of selected clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/274/1071/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/274/1071/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/274/1071/table5?GETtext/xml+votable180.050000true329.103789-30.1453010.0055555555555555565/11610 6/16387 16389 16399 16407 16409-16411 16433-16434 16444 16456 16472-16473 16475 16477 16492 16510-16511 16538-16539 16542-16543 16564 16582 16584 16593 16599 16605 16625 16641-16642 16644 16648 16651 16654 16656 16661 16663 16677 16683 16706 16898 16902 16924 16952 34461 34463 34480 34490 35161 35228 35235 35242 35266 35275 35421 35434 35441-35442 35455 35493 35516 35530 35536 35538 35563 35586 35592 35595 35606 35645 35653 35733 35735 35747 35750 35754-35756 35758 35782 35845 35853 35855 35858-35859 35864 35896 35943 35976 35978 36012 36023 36048 36062 36065-36066 36069-36070 36088 36368 46456 46460 46503 46514 46530 46538 46540 46548 46575 46687 46694 46709 46855 46858 46864 46866-46868 46879 46888-46889 46891-46892 46911 46926 46936 46974-46975 46997 47011 47013-47014 47016 47022 47030 47067 47084 48431 48450 48456https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/274/1071?format=asciiOpticaldefaultJ/MNRAS/274/1071/table2Results for galaxies in the survey with two independent observations either at the ESO 3.6-m and 2.2-m telescopes or at the AAT.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEDCCEdingburgh-Durham Cluster Catalogue (EDCC, Cat <VII/175>) cluster identification namemeta.id;meta.mainintRAB1950Right ascension (B1950)pos.eq.ra;meta.mainDEB1950Declination (B1950)pos.eq.dec;meta.mainbjApproximate (+/-0.25mag) apparent magnitude of the galaxy in the photographic b, band from the EDSGCmagphot.mag;em.opt.Bfloatcz1Radial velocity determined form Tel1 observationskm/sspect.dopplerVeloc;obsintTel1Telescope (ESO 3.6m, ESO 2.2m or ATT)meta.id;instr.telcharcz2Radial velocity determined form Tel2 observationskm/sspect.dopplerVeloc;obsintTel2Telescope (ESO 3.6m, ESO 2.2m or ATT)meta.id;instr.telcharHVHeliocentric velocitykm/sspect.dopplerVeloc;pos.heliocentricint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/MNRAS/274/1071/table3The galaxies observed in the EM cluster redshift survey ESO and AATrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEDDCEDCC cluster identification namemeta.id;meta.mainintRAB1950? Right ascension (B1950) (see note 1)pos.eq.ra;meta.mainnullableDEB1950? Declination (B1950) (see note 1)pos.eq.dec;meta.mainnullablebj? Approximate (+/-0.25mag) apparent magnitude of the galaxy in the photographic b, band from the EDSGC.magphot.mag;em.opt.BfloatnullableczHeliocentric velocity of each galaxykm/sspect.dopplerVeloc;pos.heliocentricinte_czInternal redshift error from the cross-correlation routine, described in Section 4.2.km/sstat.errorintNoteNote on observations (1)meta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/MNRAS/274/1071/table4The clusters observed in the EM redshift surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEDCCEDCC cluster identification namemeta.id;meta.mainintRAB1950Right ascension (B1950) (1)pos.eq.ra;meta.mainDEB1950Declination (B1950) (1)pos.eq.dec;meta.mainNtotTotal number of redshifts taken for each cluster (listed in Table 3)meta.numberintNclus? Number of cluster members determined from the deprojection algorithm described in Sect. 5.1meta.numberintnullablecz? Mean heliocentric redshift of the galaxy members in each clusterkm/ssrc.redshift;stat.meanintnullablee_cz? 1 sigma errors on the mean redshift of each clusterkm/sstat.errorintnullablesigma? Radial velocity dispersions for clusters with N cluster =>6km/sspect.dopplerVelocintnullableE_sigma? Error in sigma (upper limit)km/sstat.error;stat.maxintnullablee_sigma? Error in sigma (lower limit)km/sstat.errorintnullableNote[p] 'p' indicates that the cluster has been classified as a projection effect (see Sect. 5.1)meta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/MNRAS/274/1071/table5*List of selected clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEDCCEDCC cluster identification namemeta.id;meta.mainintRAB1950Right ascension (B1950) (1)pos.eq.ra;meta.mainDEB1950Declination (B1950) (1)pos.eq.dec;meta.mainR1Number of galaxy members between the magnitudes m_3_ and m_3_+2 calculated using an Abell radius of 1h^-1^Mpcmeta.numberintm10Magnitude of the 10th brightest galaxy, after background correction, within the 1h^-1^Mpc radiusmagphot.magfloatRAbellAngular 'reduced Abell radius' calculated using the equivalent of Abell's m_10_ distance estimatepos.angDistance;meta.modelledPA? Position angle of the cluster as defined in Martin et al. (1995MNRAS.274..623M)degpos.posAngintnullableEps? [0/1] Eccentricity of the clusters, defined and used in Martin et al. (1995MNRAS.274..623M).src.orbital.eccentricityfloatnullablecz? Radial velocity of the clusterkm/sspect.dopplerVelocintnullableo_cz? Number of galaxies used to determine cz (2)meta.numberintnullableRefSource of the cluster radial velocity (3)meta.bibchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed