dc.contributor.author | Ajello, M. | |
dc.contributor.author | Rebusco, Paola | |
dc.contributor.author | Cappelluti, N. | |
dc.contributor.author | Reimer, O. | |
dc.contributor.author | Böhringer, H. | |
dc.contributor.author | La Parola, V. | |
dc.contributor.author | Cusumano, G. | |
dc.date.accessioned | 2015-03-12T19:21:36Z | |
dc.date.available | 2015-03-12T19:21:36Z | |
dc.date.issued | 2010-12 | |
dc.date.submitted | 2010-04 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.issn | 1538-4357 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/95996 | |
dc.description.abstract | We 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.sponsorship | Massachusetts Institute of Technology (Pappalardo Postdoctoral Fellowship in Physics) | en_US |
dc.description.sponsorship | United States. National Aeronautics and Space Administration (NASA grant NNX07AV03G) | en_US |
dc.language.iso | en_US | |
dc.publisher | Institute of Physics/American Astronomical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1088/0004-637x/725/2/1688 | en_US |
dc.rights | Article 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.source | American Astronomical Society | en_US |
dc.title | GALAXY CLUSTERS IN THE SWIFT /BAT ERA. II. 10 MORE CLUSTERS DETECTED ABOVE 15 keV | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Ajello, 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.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.mitauthor | Rebusco, Paola | en_US |
dc.relation.journal | Astrophysical Journal | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Ajello, M.; Rebusco, P.; Cappelluti, N.; Reimer, O.; Böhringer, H.; La Parola, V.; Cusumano, G. | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-6871-9295 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |