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dc.contributor.authorAjello, M.
dc.contributor.authorRebusco, Paola
dc.contributor.authorCappelluti, N.
dc.contributor.authorReimer, O.
dc.contributor.authorBöhringer, H.
dc.contributor.authorLa Parola, V.
dc.contributor.authorCusumano, G.
dc.date.accessioned2015-03-12T19:21:36Z
dc.date.available2015-03-12T19:21:36Z
dc.date.issued2010-12
dc.date.submitted2010-04
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://hdl.handle.net/1721.1/95996
dc.description.abstractWe report on the discovery of 10 additional galaxy clusters detected in the ongoing Swift/Burst Alert Telescope (BAT) all-sky survey. Among the newly BAT-discovered clusters there are Bullet, A85, Norma, and PKS 0745-19. Norma is the only cluster, among those presented here, which is resolved by BAT. For all the clusters, we perform a detailed spectral analysis using XMM-Newton and Swift/BAT data to investigate the presence of a hard (non-thermal) X-ray excess. We find that in most cases the clusters' emission in the 0.3-200 keV band can be explained by a multi-temperature thermal model confirming our previous results. For two clusters (Bullet and A3667), we find evidence for the presence of a hard X-ray excess. In the case of the Bullet cluster, our analysis confirms the presence of a non-thermal, power-law-like, component with a 20-100 keV flux of 3.4 × 10[superscript –12] erg cm[superscript –2] s[superscript –1] as detected in previous studies. For A3667, the excess emission can be successfully modeled as a hot component (kT ~ 13 keV). We thus conclude that the hard X-ray emission from galaxy clusters (except the Bullet) has most likely a thermal origin.en_US
dc.description.sponsorshipMassachusetts Institute of Technology (Pappalardo Postdoctoral Fellowship in Physics)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA grant NNX07AV03G)en_US
dc.language.isoen_US
dc.publisherInstitute of Physics/American Astronomical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/725/2/1688en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleGALAXY CLUSTERS IN THE SWIFT /BAT ERA. II. 10 MORE CLUSTERS DETECTED ABOVE 15 keVen_US
dc.typeArticleen_US
dc.identifier.citationAjello, M., P. Rebusco, N. Cappelluti, O. Reimer, H. Böhringer, V. La Parola, and G. Cusumano. “ GALAXY CLUSTERS IN THE SWIFT /BAT ERA. II. 10 MORE CLUSTERS DETECTED ABOVE 15 keV .” The Astrophysical Journal 725, no. 2 (December 1, 2010): 1688–1706. © 2010 American Astronomical Society.en_US
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorRebusco, Paolaen_US
dc.relation.journalAstrophysical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsAjello, M.; Rebusco, P.; Cappelluti, N.; Reimer, O.; Böhringer, H.; La Parola, V.; Cusumano, G.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-6871-9295
mit.licensePUBLISHER_POLICYen_US


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