J/AJ/137/3942ivo://CDS.VizieR/J/AJ/137/3942doi:10.26093/cds/vizier.51373942CDSLa Barbera F.De Carvalho R.R.De La Rosa I.G.Sorrentino G.Gal R.R.,Kohl-moreira J.L.2011-12-03T15:50:45Z2011-11-20T18:42:25ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesWe use SDSS-DR4 photometric and spectroscopic data out to redshift z~0.1 combined with ROSAT All Sky Survey X-ray data to produce a sample of 25 fossil groups (FGs), defined as bound systems dominated by a single, luminous elliptical galaxy with extended X-ray emission. We examine possible biases introduced by varying the parameters used to define the sample, and the main pitfalls are also discussed.2009AJ....137.3942Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/3942CatalogResearchIsServedByTAP 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/137/3942https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/137/3942http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/137/3942https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/137/3942https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/137/3942http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/137/3942GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/137/3942/table2 (Properties of fossil group (FG) and field galaxies (FS) galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/137/3942/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/137/3942/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/137/3942/table2?GETtext/xml+votable180.050000true197.32954-1.62250.0055555555555555566/4098 4114 4786 4995 5005 5012 5013 5991 5996 6551 6554 6583 7274 8695 9180 9607 9739 9943 10594 10693 10928 11287 11341 17303 17321 18006 18073 18956 19757 20033 25843 25940 26053 26141 26188 26218 26271 26322 27325 27387 27649 27681 27748 27835https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/137/3942?format=asciiX-raydefaultJ/AJ/137/3942/table2Properties of fossil group (FG) and field galaxies (FS) galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number, [LDD2009] NN in Simbadmeta.recordintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainzSDSS-DR4 spectroscopic redshiftsrc.redshiftfloatrMAGr band absolute magnitude of the first-rank galaxy (z=0.1 k-corrected)magphys.magAbsfloatDMMagnitude gap of the fossil group, {Delta}Mmagphot.mag;arith.difffloatg-rg-r colour index (z=0.1 k-corrected)) (1)magphot.color;em.opt.B;em.opt.RfloatdNDensity excess around each galaxy, {delta}Nphys.densityfloatgReffEffective radii in g bandarcsecphys.angSize;srcfloatrReffEffective radii in r bandarcsecphys.angSize;srcfloatnrSersic index in r bandstat.fit.paramfloata4a_4_ parameter (describes boxy/disky departures from elliptical shape)%src.morph.paramfloatn(g-r)Internal color gradient, {nabla}(g-r) (mag/dex)magarith.grad;phot.colorfloatlogLXX-ray luminositylog(1e+37W)phys.luminosity;em.X-rayfloatdCMDistance of the galaxy to the red sequence, {delta}CM (3)pos.distance;src.class.starGalaxy;obs.sequencefloatlog(sig)Velocity dispersionlog(km.s**-1)phys.veloc.dispersionfloatlogAgeAgelog(yr)time.agefloat[Z/H]Metallicitylog(Sun)phys.abund.Zfloat[a/Fe]Abundance of {alpha}-elements [{alpha}/Fe]phys.abundfloatFlag[0/2] Pecularities, 1=fossil group (2)meta.code.errorcharngSersic index in g bandstat.fit.paramfloat