{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:KETWGRA2VE3IDTYXOVZJKP7KT4","short_pith_number":"pith:KETWGRA2","schema_version":"1.0","canonical_sha256":"512763441aa93681cf177572953fea9f0f1b1ebd470652a2ae0e5be3cd18b3df","source":{"kind":"arxiv","id":"0809.3832","version":1},"attestation_state":"computed","paper":{"title":"The X-ray Cluster Normalization of the Matter Power Spectrum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andishieh Mahdavi, Arif Babul, August E. Evrard, Henk Hoekstra, J. Patrick Henry","submitted_at":"2008-09-23T00:10:07Z","abstract_excerpt":"The number density of galaxy clusters provides tight statistical constraints on the matter fluctuation power spectrum normalization, traditionally phrased in terms of sigma_8, the root mean square mass fluctuation in spheres with radius 8 h^-1 Mpc. We present constraints on sigma_8 and the total matter density Omega_m0 from local cluster counts as a function of X-ray temperature, taking care to incorporate and minimize systematic errors that plagued previous work with this method. In particular, we present new determinations of the cluster luminosity - temperature and mass - temperature relati"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0809.3832","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-23T00:10:07Z","cross_cats_sorted":[],"title_canon_sha256":"3268319fab44199aa0a9f0f5994b94edee777690537ba2362274943a6a7a065e","abstract_canon_sha256":"19d65119a56c068344448d0cb9f76bfffbc59987c90db933101c3ed0d1f2f083"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:26.566043Z","signature_b64":"gKBdJFyhCfDevKKLjSU7+4tBt3I+hKSubDFNiXbY3mvKQEPyMndI4LpzOyyXFPpFYR6P3ESnGrloM/T9dboKBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"512763441aa93681cf177572953fea9f0f1b1ebd470652a2ae0e5be3cd18b3df","last_reissued_at":"2026-05-18T04:29:26.565679Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:26.565679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The X-ray Cluster Normalization of the Matter Power Spectrum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andishieh Mahdavi, Arif Babul, August E. Evrard, Henk Hoekstra, J. Patrick Henry","submitted_at":"2008-09-23T00:10:07Z","abstract_excerpt":"The number density of galaxy clusters provides tight statistical constraints on the matter fluctuation power spectrum normalization, traditionally phrased in terms of sigma_8, the root mean square mass fluctuation in spheres with radius 8 h^-1 Mpc. We present constraints on sigma_8 and the total matter density Omega_m0 from local cluster counts as a function of X-ray temperature, taking care to incorporate and minimize systematic errors that plagued previous work with this method. In particular, we present new determinations of the cluster luminosity - temperature and mass - temperature relati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.3832","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0809.3832","created_at":"2026-05-18T04:29:26.565731+00:00"},{"alias_kind":"arxiv_version","alias_value":"0809.3832v1","created_at":"2026-05-18T04:29:26.565731+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.3832","created_at":"2026-05-18T04:29:26.565731+00:00"},{"alias_kind":"pith_short_12","alias_value":"KETWGRA2VE3I","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"KETWGRA2VE3IDTYX","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"KETWGRA2","created_at":"2026-05-18T12:25:57.157939+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4","json":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4.json","graph_json":"https://pith.science/api/pith-number/KETWGRA2VE3IDTYXOVZJKP7KT4/graph.json","events_json":"https://pith.science/api/pith-number/KETWGRA2VE3IDTYXOVZJKP7KT4/events.json","paper":"https://pith.science/paper/KETWGRA2"},"agent_actions":{"view_html":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4","download_json":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4.json","view_paper":"https://pith.science/paper/KETWGRA2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0809.3832&json=true","fetch_graph":"https://pith.science/api/pith-number/KETWGRA2VE3IDTYXOVZJKP7KT4/graph.json","fetch_events":"https://pith.science/api/pith-number/KETWGRA2VE3IDTYXOVZJKP7KT4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4/action/storage_attestation","attest_author":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4/action/author_attestation","sign_citation":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4/action/citation_signature","submit_replication":"https://pith.science/pith/KETWGRA2VE3IDTYXOVZJKP7KT4/action/replication_record"}},"created_at":"2026-05-18T04:29:26.565731+00:00","updated_at":"2026-05-18T04:29:26.565731+00:00"}