{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:BDSMGKAE4GEQ2CK3WJMIW5V7ZX","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8d82a94dea881cdcd1d45f20260555f490a4a139590109622d9df0e44449b0a7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-18T09:38:29Z","title_canon_sha256":"c2bcd42b0a849012fd503d3197014347b9562e79e34e164d779f54a6ad300016"},"schema_version":"1.0","source":{"id":"astro-ph/0405340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405340","created_at":"2026-07-04T15:20:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405340v1","created_at":"2026-07-04T15:20:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405340","created_at":"2026-07-04T15:20:14Z"},{"alias_kind":"pith_short_12","alias_value":"BDSMGKAE4GEQ","created_at":"2026-07-04T15:20:14Z"},{"alias_kind":"pith_short_16","alias_value":"BDSMGKAE4GEQ2CK3","created_at":"2026-07-04T15:20:14Z"},{"alias_kind":"pith_short_8","alias_value":"BDSMGKAE","created_at":"2026-07-04T15:20:14Z"}],"graph_snapshots":[{"event_id":"sha256:b1b5e13c3ff2ae476cdceaac121cbc1e145a716fa0a762c25abfc2d76e3ecfda","target":"graph","created_at":"2026-07-04T15:20:14Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0405340/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present constraints on the mean dark energy density, Omega_X and dark energy equation of state parameter, w_X, based on Chandra measurements of the X-ray gas mass fraction in 26 X-ray luminous, dynamically relaxed galaxy clusters spanning the redshift range 0.07<z<0.9. Under the assumption that the X-ray gas mass fraction measured within r_2500 is constant with redshift and using only weak priors on the Hubble constant and mean baryon density of the Universe, we obtain a clear detection of the effects of dark energy on the distances to the clusters, confirming (at comparable significance) p","authors_text":"A.C. Fabian (IoA Cambridge), Hawaii), H. Ebeling (IfA, L. van Speybroeck (CfA), R.W. Schmidt (Potsdam University), S.W. Allen (IoA Cambridge)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-05-18T09:38:29Z","title":"Constraints on dark energy from Chandra observations of the largest relaxed galaxy clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405340","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:33d3d1310012ca4ed523efa2f4e2fe972cad9eae75e341f8bff6f9d04016c1ee","target":"record","created_at":"2026-07-04T15:20:14Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8d82a94dea881cdcd1d45f20260555f490a4a139590109622d9df0e44449b0a7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-18T09:38:29Z","title_canon_sha256":"c2bcd42b0a849012fd503d3197014347b9562e79e34e164d779f54a6ad300016"},"schema_version":"1.0","source":{"id":"astro-ph/0405340","kind":"arxiv","version":1}},"canonical_sha256":"08e4c32804e1890d095bb2588b76bfcdc350ca7375a8a82554b3805771a6ae4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"08e4c32804e1890d095bb2588b76bfcdc350ca7375a8a82554b3805771a6ae4a","first_computed_at":"2026-07-04T15:20:14.009873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:20:14.009873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zGt2HgUWoF2/R9VuQ0E7grzm6UCrT2L1mGl4SEZTBITA2UdnzLbsju9zp1voWtG/AltW70otJqW5+aqrXZpUDw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:20:14.010266Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0405340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33d3d1310012ca4ed523efa2f4e2fe972cad9eae75e341f8bff6f9d04016c1ee","sha256:b1b5e13c3ff2ae476cdceaac121cbc1e145a716fa0a762c25abfc2d76e3ecfda"],"state_sha256":"8eecc7b1141f49bc09444aab521877f68a3a88aa806429c021cb554f6e96c6f1"}