{"paper":{"title":"XMM-Newton and Chandra observations of SHEEP sources","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Georgakakis (Imperial College), I.E. Papadakis (University of Crete), I. Georgantopoulos (National Observatory of Athens), K. Nandra (Imperial College), M. Brotherton (University of Wyoming & Kitt Peak National Observatory), P. O'Neill (Imperial College)","submitted_at":"2006-01-11T16:16:07Z","abstract_excerpt":"We present Chandra and XMM observations of 12 bright (f(2-10 keV)\n > 10^-13 cgs) sources from the ASCA SHEEP (Search for the High Energy\n Extragalactic Population) survey. Most of these have been either not observed or not detected previously with the ROSAT mission and therefore they constitute a sample biased towards hard sources. The Chandra observations are important in locating with accuracy the optical counterpart of the X-ray sources. Optical spectroscopic observations show that our sample is associated with both narrow-line (NL) (six objects), and\n Broad-Line (BL) AGN (five objects) wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0601245","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"}