{"paper":{"title":"The XMM deep survey in the CDFS IV. Candidate Compton-thick AGN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Comastri (INAF/OABO), C. Vignali (BolognaU), D. Elbaz (CEA-Saclay), E. Rovilos (Dureham U.), F. Carrera (IFCA), I. Balestra (MPE), I. Georgantopoulos (INAF/OABO, INAF/OABO, INAF/Padova), J. Fritz (Gent U., K. Iwasawa, M. Brusa (Bologna U., MPE), N. Cappelluti (INAF/OABO), N. Castello-Mor (IFCA), NOA), P. Ranalli (NOA), P. Tozzi (INAF/Trieste), R. Gilli (INAF/OABO), R. J. Mullaney (CEA-Saclay), S. Falocco (IFCA), X. Barcons (IFCA)","submitted_at":"2013-03-22T09:37:00Z","abstract_excerpt":"The Chandra Deep Field is the region of the sky with the highest concentration of X-ray data available: 4Ms of Chandra and 3Ms of XMM data, allowing excellent quality spectra to be extracted even for faint sources. We take advantage of this in order to compile a sample of heavily obscured Active Galactic Nuclei (AGN) using X-ray spectroscopy. We select our sample among the 176 brightest XMM sources, searching for either a) flat X-ray spectra (Photon index<1.4 at the 90% confidence level) suggestive of a reflection dominated continuum or b) an absorption turn-over suggestive of a column density"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.5556","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}