{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:J67KXW2L5UY3HE2VRQ34NZURID","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":"468a352b63c25fd3187653d724e7d17150aadb4e92b16975d736d860638d2d6d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-11T20:00:06Z","title_canon_sha256":"c6fc78e9b1365ee67041b2e7bc9a7d25328e3dd04b3ab9bcc365e3274458fbaf"},"schema_version":"1.0","source":{"id":"1104.2041","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.2041","created_at":"2026-05-18T02:02:35Z"},{"alias_kind":"arxiv_version","alias_value":"1104.2041v1","created_at":"2026-05-18T02:02:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2041","created_at":"2026-05-18T02:02:35Z"},{"alias_kind":"pith_short_12","alias_value":"J67KXW2L5UY3","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"J67KXW2L5UY3HE2V","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"J67KXW2L","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:6b0b6877eaad633c3157abd6f3af107788c9afb688c4bc44eedf487ddf185139","target":"graph","created_at":"2026-05-18T02:02:35Z","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"},"paper":{"abstract_excerpt":"The cause of the accelerated expansion of the Universe poses one of the most fundamental questions in physics today. In the absence of a compelling theory to explain the observations, a first task is to develop a robust phenomenology. If the acceleration is driven by some form of dark energy, then, the phenomenology is determined by the dark energy equation of state w. A major aim of ongoing and upcoming cosmological surveys is to measure w and its time dependence at high accuracy. Since w(z) is not directly accessible to measurement, powerful reconstruction methods are needed to extract it re","authors_text":"Bruno Sanso, David Higdon, Herbie Lee, Katrin Heitmann, Salman Habib, Tracy Holsclaw, Ujjaini Alam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-11T20:00:06Z","title":"Nonparametric Reconstruction of the Dark Energy Equation of State from Diverse Data Sets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2041","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:c3086c58ad3142e38a67d607325dc50dc9cd7ae864775ac9ebc8dbe761e8481c","target":"record","created_at":"2026-05-18T02:02:35Z","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":"468a352b63c25fd3187653d724e7d17150aadb4e92b16975d736d860638d2d6d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-11T20:00:06Z","title_canon_sha256":"c6fc78e9b1365ee67041b2e7bc9a7d25328e3dd04b3ab9bcc365e3274458fbaf"},"schema_version":"1.0","source":{"id":"1104.2041","kind":"arxiv","version":1}},"canonical_sha256":"4fbeabdb4bed31b393558c37c6e69140e68d1e06ab0b5e21de5732afc7dfc04e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4fbeabdb4bed31b393558c37c6e69140e68d1e06ab0b5e21de5732afc7dfc04e","first_computed_at":"2026-05-18T02:02:35.192414Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:35.192414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+UC3rUwJ1bHomLDQ+/4MibdnIeHATtb9gs2CBU/euqzhh+dTyoxYFkTTPlKQGVW7RssbpuPpPtk52SVQdkpWAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:35.193214Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.2041","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3086c58ad3142e38a67d607325dc50dc9cd7ae864775ac9ebc8dbe761e8481c","sha256:6b0b6877eaad633c3157abd6f3af107788c9afb688c4bc44eedf487ddf185139"],"state_sha256":"898bf00a552f7ee60bfe5cd256be5271f94d5cf105de5a6888c166b77dfb9401"}