J/ApJ/681/1017ivo://CDS.VizieR/J/ApJ/681/1017doi:10.26093/cds/vizier.16811017CDSFassnacht C.D.Kocevski D.D.Auger M.W.Lubin L.M.Neureuther J.L.,Jeltema T.E.Mulchaey J.S.McKean J.P.2017-11-10T11:16:23Z2010-11-08T11:14:27ZCDS support team

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

cds-question@unistra.frx-ray-sourcesgalaxy-clustersredshiftedWe present results from a systematic investigation of the X-ray properties of a sample of moderate-redshift (0.3<z<0.6) galaxy groups. These groups were selected not by traditional X-ray or optical search methods, but rather by an association, either physical or along the line of sight, with a strong gravitational lens. We calculate the properties of seven galaxy groups in the fields of six lens systems. Diffuse X-ray emission from the intragroup medium is detected in four of the groups. All of the detected groups have X-ray luminosities greater than 10^42^h^-2^ergs/s and lie on the L_X_^-{sigma}_v_^ relations defined by local groups and clusters. The upper limits for the nondetections are also consistent with the local L_X_^-{sigma}_v_^ relationships. Although the sample size is small and deeper optical and X-ray data are needed, these results suggest that lens-selected groups are similar to X-ray-selected samples and thus are more massive than the typical poor-group environments of local galaxies.2008ApJ...681.1017Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/681/1017CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/ApJ/658/865 : Redshifts of galaxies in X-ray-luminous groups (Jeltema+,J/ApJ/496/39 : Properties of poor groups of galaxies. I. (Zabludoff+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/681/1017https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/681/1017http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/681/1017https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/681/1017https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/681/1017http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/681/1017GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/681/1017/group (Properties of diffuse group emission (tables 2 and 3 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/681/1017/group?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/681/1017/group?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/681/1017/group?GETtext/xml+votable180.050000true109.018333347.14694440.005555555555555556Cone search capability for table J/ApJ/681/1017/sources (Serendipitous sources detected in the field of B0712+472 (table 6) or B2108+213 (table 7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/681/1017/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/681/1017/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/681/1017/sources?GETtext/xml+votable180.050000true109.2260647.18790.0055555555555555566/6926 6927 6948 8912 9837 11667 12719 27127https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/681/1017?format=asciiX-rayOpticaldefaultJ/ApJ/681/1017/groupProperties of diffuse group emission (tables 2 and 3 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupGroup namemeta.idcharRAJ2000? Hour of right ascension (J2000)pos.eq.ranullableDEJ2000? Degree of declination (J2000)pos.eq.decnullablenHNeutral hydrogen column densities of Dickey & Lockman (1990ARA&A..28..215D)1e+20cm**-2phys.abund.XfloatCts? Net counts in x-rayphot.count;em.X-rayintnullableCtR? Count rate in x-ray0.001s**-1phot.count;em.X-rayfloatnullablel_FluxLimit flag on Fluxmeta.code.error;phot.fluxcharFluxSoft band flux corrected from Galactic absorption (1)aW.m**-2phot.flux;em.X-rayfloate_Flux? Uncertainty in FluxaW.m**-2stat.error;phot.fluxfloatnullablel_LxLimit flag on Lxmeta.code.errorcharLxRest-frame bolometric luminosity in 10^42^h^-2^ergs/s units1e+35Wphys.luminosity;em.X-rayfloate_Lx? Uncertainty in Lx1e+35Wstat.errorfloatnullablel_Lx500Limit flag on Lx500meta.code.errorcharLx500? Rest-frame bolometric luminosity within R_500_ (in 10^42^h^-2^ergs/s)phys.luminosityfloatnullablee_Lx500? Uncertainty in Lx500stat.errorfloatnullableN? Group optical number of membersmeta.numberintnullablen_N[a] a = optical data in B2108-1 are for B2108meta.notecharz? Group optical redshiftsrc.redshiftfloatnullablesigma? Group optical radial velocity dispersionkm/sphys.veloc.dispersionintnullablee_sigma? {sigma} uncertaintykm/sstat.errorintnullableR500? Group optical radius at 500 times critical density, in h^-1^kpc units (2)kpcphys.size.radiusintnullablethe500? Group optical position angle at 500 times critical densityarcsecpos.posAngintnullable_RAPositions from authors (this work) or from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from authors (this work) or from Simbad (declination part)degpos.eq.dec;meta.mainJ/ApJ/681/1017/sourcesSerendipitous sources detected in the field of B0712+472 (table 6) or B2108+213 (table 7 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupSimbad column added by the CDSmeta.id.parentcharCXOName (JHHMMSS.s+DDMMSS, <CXOU JHHMMSS.s+DDMMSS> in Simbad)meta.id;meta.maincharf_CXO[b] extended source flagmeta.codecharRAJ2000Right ascension in decimal degree (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degree (J2000)degpos.eq.dec;meta.mainSctsSoft (0.5-2.0keV) band net countsctphot.count;em.X-rayintHctsHard (2.0-8.0keV) band net countsctphot.count;em.X-rayintFctsFull (0.5-8.0keV) band net countsctphot.count;em.X-rayintSsigSoft (0.5-2.0keV) band significance (3)phot.count;em.X-rayfloatHsigHard (2.0-8.0keV) band significance (3)phot.count;em.X-rayfloatFsigFull (0.5-8.0keV) band significance (3)phot.count;em.X-rayfloat