{"paper":{"title":"The XMM-Newton $\\Omega$ Project","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Blanchard, A.K. Romer, C.A. Collins, C. Adami (associate), C. Pichon, D.H. Lumb, D.J. Burke, D. Neumann, J.G. Bartlett, J. Nevalainen, J.-Ph. Bernard, M. Arnaud, M. Boer, M. Giard, N. Aghanim, Ph. Marty, R.C. Nichol, R. Sadat, S. Majerowicz","submitted_at":"2001-06-06T12:03:36Z","abstract_excerpt":"The abundance of high-redshift galaxy clusters depends sensitively on the matter density $\\OmM$ and, to a lesser extent, on the cosmological constant $\\Lambda$. Measurements of this abundance therefore constrain these fundamental cosmological parameters, and in a manner independent and complementary to other methods, such as observations of the cosmic microwave background and distance measurements. Cluster abundance is best measured by the X-ray temperature function, as opposed to luminosity, because temperature and mass are tightly correlated, as demonstrated by numerical simulations. Taking "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0106098","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0106098/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}