J/MNRAS/392/1509ivo://CDS.VizieR/J/MNRAS/392/1509doi:10.26093/cds/vizier.73921509CDSGilmour R.Best P.Almaini O.2024-07-08T20:15:04Z2009-10-29T14:31:36ZCDS support team

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

cds-question@unistra.frgalaxy-clustersactive-galactic-nucleix-ray-sourcesWe present an analysis of the X-ray point source populations in 182 Chandra images of galaxy clusters at z>0.1 with exposure time >10ks, as well as 44 non-cluster fields. The analysis of the number and flux of these sources, using a detailed pipeline to predict the distribution of non-cluster sources in each field, reveals an excess of X-ray point sources associated with the galaxy clusters. A sample of 148 galaxy clusters at 0.1<z<0.9 , with no other nearby clusters, shows an excess of 230 cluster sources in total, an average of ~1.5 sources per cluster. The lack of optical data for these clusters limits the physical interpretation of this result, as we cannot calculate the fraction of cluster galaxies hosting X-ray sources. However, the fluxes of the excess sources indicate that over half of them are very likely to be active galactic nuclei (AGN), and the radial distribution shows that they are quite evenly distributed over the central 1Mpc of the cluster, with almost no sources found beyond this radius. We also use this pipeline to successfully reproduce the results of previous studies, particularly the higher density of sources in the central 0.5Mpc of a few cluster fields, but show that these conclusions are not generally valid for this larger sample of clusters. We conclude that some of these differences may be due to the sample properties, such as the size and redshift of the clusters studied, or a lack of publications for cluster fields with no excess sources. This paper also presents the basic X-ray properties of the galaxy clusters, and in subsequent papers in this series the dependence of the AGN population on these cluster properties will be evaluated.2009MNRAS.392.1509Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/392/1509CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/392/1509https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/392/1509http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/392/1509https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/392/1509https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/392/1509http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/392/1509GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/392/1509/table2 (Final cluster sample split by morphological class)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/392/1509/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/392/1509/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/392/1509/table2?GETtext/xml+votable180.050000true4.6416.4368330.005555555555555556Cone search capability for table J/MNRAS/392/1509/table4 (Properties of sources detected in the cluster fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/392/1509/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/392/1509/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/392/1509/table4?GETtext/xml+votable180.050000true213.0412552.0721390.0055555555555555565/7031 6/247 609 612 4206-4207 4215 4406-4407 4859 4924 4964 5016 5066-5067 5088-5089 5094 5099-5100 5299 5483 5536 5538 5569 5585 5701 5712 5731 5793 5795 5798 5842 5848 5881 5883-5884 5886 5985 6337 6382-6383 6441 6539 6561 7242-7243 7273 7323 7345 7371 7510 7604 7753 7756 7768-7769 7888 7904 8033 8066 8072 8555 8644 8914-8915 8921 8969 9049-9050 9052 9168 9272 9455 9464 9466 9476-9477 9496-9498 9742 9764 9997 9999 10386-10387 10527 10529 10544 10658 10664 10692 10694 10743 10822-10823 10877 10879 10936 10938 10992 11040 11042-11043 11048 11050 11080-11081 11194-11195 11624 11626 11632 11791 11802 11807 11974-11975 11980 12253 12255 12597 12599 12640 12642 12653 12664 13312 13314 13341 13384 15003 15006 16486 16609 16953 17222 17456-17457 17472 17499 17502 17692 17819 17840-17841 18473 18475 18534 18667 18746-18747 18779 18800 18878 19009 19097 19220 19540 19542 19846 19848-19849 19935 19950 20292 21016 22007 22605 22607 22661 22672 22915 22949 22959-22960 22966 22970 22972 23173 23192 23321 23324 23326 23349 23474 24759 24765 24785 24853 24855 25100 25102 25188 25451 25673 25675 25981 25983 25990 26037 26080 26082 26177 26180 26189 26298 26753 26755-26756 26758 26784-26785 27009 27073 27075 27428 27476 27571 27574 27664 27740 28174 28220 28359 28365 28370 28376 28426 28430 28448-28449 28452 28483 28486 28488-28489 28535 30946 31282 31288 31509 31536-31537 31552 31730 31736 32500 32502-32503 32686-32687 34139 34157 34159 34168 34170 34264 34503 34512 34534-34535 34540 34668 34670 35147 35683 36082 36098 36104 36131 36137 36423 36545 36547 36826 36844 36846-36847 38973 40613 40615 43945 43947 45044 45046 45791 45962 45984 46474 46496 46571 46924 47043 48423 49012 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/392/1509?format=asciiX-raydefaultJ/MNRAS/392/1509/table2Final cluster sample split by morphological classrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMclMorphological class code (1)meta.code;src.morphcharClusterCluster name (2)meta.id;meta.maincharprimaryObsIDChandra observation identification number(s)meta.id;obs.param;obscharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainCCDACIS detector or CCDs usedmeta.notecharExpGood exposure time, after filtering (average over the selected chips)kstime.duration;obs.exposurefloatFX? Observed X-ray flux in 0.5-8keV band (4)fW.m**-2phot.flux;em.X-rayfloatnullableLX1? Rest frame 0.5-8keV luminosity (4)1e+37Wphys.luminosity;em.X-rayfloatnullableLX2? Rest frame 0.1-2.4keV luminosity (4)1e+37Wphys.luminosity;em.X-rayfloatnullablerchi2? Reduced chi^2^ valuestat.fit.chi2floatnullablezRedshiftsrc.redshiftfloatr_zReferences for redshift, in refs.dat filemeta.ref;pos.framecharn_z[1/3] Note on z (3)meta.notecharExcessExcess number of sources in the central 1Mpc (compared to the prediction)meta.numberfloatE_ExcessError on Excess (upper value)stat.error;stat.maxfloate_ExcessError on Excess (lower value)stat.error;phot.color.excessfloatCentre? log luminosity of any source detected within 25 kpc of the cluster centrelog(1e-07W)phys.luminosity;em.X-rayfloatnullablen_Centre[2]? Note on Centre (3)meta.noteintnullableSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDScharJ/MNRAS/392/1509/table4Properties of sources detected in the cluster fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharCXOGBASource name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainCtNet Countsctphot.count;em.X-rayfloatFXX-ray flux (1)aW.m**-2phot.flux;em.X-rayfloatSigSource significance (2)stat.fit.goodnessfloatHR? Hardness ratio (3)phot.flux;arith.ratiofloatnullablee_HR? rms uncertainty on HRstat.errorfloatnullableJ/MNRAS/392/1509/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar