J/ApJ/795/L21ivo://CDS.VizieR/J/ApJ/795/L21doi:10.26093/cds/vizier.17959021CDSGriffin R.D.Dai X.Kochanek C.S.2017-06-12T08:59:28Z2017-05-22T12:01:13ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesredshiftedgamma-ray-astronomyGalaxy clusters are predicted to produce {gamma}-rays through cosmic ray interactions and/or dark matter annihilation, potentially detectable by the Fermi Large Area Telescope (Fermi-LAT). We present a new, independent stacking analysis of Fermi-LAT photon count maps using the 78 richest nearby clusters (z<0.12) from the Two Micron All Sky Survey cluster catalog. We obtain the lowest limit on the photon flux to date, 2.3x10^-11^ photons/cm2/s (95% confidence) per cluster in the 0.8-100 GeV band, which corresponds to a luminosity limit of 3.5x10^44^ photons/s. We also constrain the emission limits in a range of narrower energy bands. Scaling to recent cosmic ray acceleration and {gamma}-ray emission models, we find that cosmic rays represent a negligible contribution to the intra-cluster energy density and gas pressure.2014ApJ...795L..21Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/795/L21CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/145 : Nearby Galaxies Catalogue (NBG) (Tully 1988)I/110A : Rich Clusters of Galaxies (Abell+ 1989)VIII/50 : VLA Survey of Rich Clusters of Galaxies (Slee+ 1996)J/AJ/149/171 : 2MASS galaxy group catalog (Tully, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/795/L21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/795/L21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/795/L21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/795/L21https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/795/L21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/795/L21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/795/L21/table1 (Galaxy Cluster Sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/795/L21/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/795/L21/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/795/L21/table1?GETtext/xml+votable180.050000true52.59-52.5850.0055555555555555566/206 207 986 1006 2173 5373 5606 5988 6922 7026 7887 8212 8217 8220 8258 8264 8266 8288 8442 8515 8520 8526 8693 8735 9036 9048 9072 9168 9329 9354 9366 9468 9504 9508 10379 10823 11182 11229 11413 11591 11615 11809 12121 15290 16096 16407 16411 16642 16713 16765 16953 17044 17237 17300 18016 18026 18060 18415 18584 18596 18683 19170 19204 19780 19905 19930 19993 20083 20112 20125 20302 20358 20706 20707 21061 21133 21134 21847 21971 22577 23406 23451 24650 24943 25042 25081 25410 25466 25481 25852 26135 26165 26167 26185 26208 26302 26432 27081 27226 27420 27671 27685 27736 27765 27777 27966 31200 31396 32327 33208 33235 33466 33614 33628 33648 33649 33756 34126 34443 34726 35758 36048 38828 39077 39079 40809 43757 43830 43835 43836 43837 43838 43848 43905 43939 43950 43977 45095 45542 45543 45562 45893 45942 45981 45984 45997 46101 47188 47573 47961 48171 48456 48594 48622 48639https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/795/L21?format=asciiOpticalGamma-raydefaultJ/ApJ/795/L21/table1Galaxy Cluster SamplezRedshiftsrc.redshiftfloatRichRichness (1)src.class.richnessfloatDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource identifier (JHHMM-DDMM) (1)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.main