{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:J67KXW2L5UY3HE2VRQ34NZURID","short_pith_number":"pith:J67KXW2L","schema_version":"1.0","canonical_sha256":"4fbeabdb4bed31b393558c37c6e69140e68d1e06ab0b5e21de5732afc7dfc04e","source":{"kind":"arxiv","id":"1104.2041","version":1},"attestation_state":"computed","paper":{"title":"Nonparametric Reconstruction of the Dark Energy Equation of State from Diverse Data Sets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Bruno Sanso, David Higdon, Herbie Lee, Katrin Heitmann, Salman Habib, Tracy Holsclaw, Ujjaini Alam","submitted_at":"2011-04-11T20:00:06Z","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"},"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":"1104.2041","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-11T20:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"c6fc78e9b1365ee67041b2e7bc9a7d25328e3dd04b3ab9bcc365e3274458fbaf","abstract_canon_sha256":"468a352b63c25fd3187653d724e7d17150aadb4e92b16975d736d860638d2d6d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:35.193214Z","signature_b64":"+UC3rUwJ1bHomLDQ+/4MibdnIeHATtb9gs2CBU/euqzhh+dTyoxYFkTTPlKQGVW7RssbpuPpPtk52SVQdkpWAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4fbeabdb4bed31b393558c37c6e69140e68d1e06ab0b5e21de5732afc7dfc04e","last_reissued_at":"2026-05-18T02:02:35.192414Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:35.192414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonparametric Reconstruction of the Dark Energy Equation of State from Diverse Data Sets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Bruno Sanso, David Higdon, Herbie Lee, Katrin Heitmann, Salman Habib, Tracy Holsclaw, Ujjaini Alam","submitted_at":"2011-04-11T20:00:06Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2041","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":"1104.2041","created_at":"2026-05-18T02:02:35.192549+00:00"},{"alias_kind":"arxiv_version","alias_value":"1104.2041v1","created_at":"2026-05-18T02:02:35.192549+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2041","created_at":"2026-05-18T02:02:35.192549+00:00"},{"alias_kind":"pith_short_12","alias_value":"J67KXW2L5UY3","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_16","alias_value":"J67KXW2L5UY3HE2V","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_8","alias_value":"J67KXW2L","created_at":"2026-05-18T12:26:32.869790+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.21456","citing_title":"Negative neutrino mass or negative dark energy?","ref_index":50,"is_internal_anchor":true},{"citing_arxiv_id":"2604.12987","citing_title":"Do equation of state parametrizations of dark energy faithfully capture the dynamics of the late universe?","ref_index":68,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID","json":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID.json","graph_json":"https://pith.science/api/pith-number/J67KXW2L5UY3HE2VRQ34NZURID/graph.json","events_json":"https://pith.science/api/pith-number/J67KXW2L5UY3HE2VRQ34NZURID/events.json","paper":"https://pith.science/paper/J67KXW2L"},"agent_actions":{"view_html":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID","download_json":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID.json","view_paper":"https://pith.science/paper/J67KXW2L","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1104.2041&json=true","fetch_graph":"https://pith.science/api/pith-number/J67KXW2L5UY3HE2VRQ34NZURID/graph.json","fetch_events":"https://pith.science/api/pith-number/J67KXW2L5UY3HE2VRQ34NZURID/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID/action/timestamp_anchor","attest_storage":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID/action/storage_attestation","attest_author":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID/action/author_attestation","sign_citation":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID/action/citation_signature","submit_replication":"https://pith.science/pith/J67KXW2L5UY3HE2VRQ34NZURID/action/replication_record"}},"created_at":"2026-05-18T02:02:35.192549+00:00","updated_at":"2026-05-18T02:02:35.192549+00:00"}