{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:XZPOGE7PLE57KSLEUPOLWWNW47","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":"682add8fcf091d5c0822ab12de7a44458d8de7508aa5d153c8e20e66559d62ed","cross_cats_sorted":["gr-qc","hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-05-16T20:01:52Z","title_canon_sha256":"803f67b6b8da2cb3955c48dcac2b7e824fd50acb4543713a9211b34a359344c2"},"schema_version":"1.0","source":{"id":"astro-ph/0505329","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0505329","created_at":"2026-07-04T17:16:30Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0505329v4","created_at":"2026-07-04T17:16:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0505329","created_at":"2026-07-04T17:16:30Z"},{"alias_kind":"pith_short_12","alias_value":"XZPOGE7PLE57","created_at":"2026-07-04T17:16:30Z"},{"alias_kind":"pith_short_16","alias_value":"XZPOGE7PLE57KSLE","created_at":"2026-07-04T17:16:30Z"},{"alias_kind":"pith_short_8","alias_value":"XZPOGE7P","created_at":"2026-07-04T17:16:30Z"}],"graph_snapshots":[{"event_id":"sha256:347e66ec0d6cd538174e73686965f5d842b07fcb2a219a1af9594db72f27108f","target":"graph","created_at":"2026-07-04T17:16:30Z","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/0505329/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose a non-parametric method of smoothing supernova data over redshift using a Gaussian kernel in order to reconstruct important cosmological quantities including H(z) and w(z) in a model independent manner. This method is shown to be successful in discriminating between different models of dark energy when the quality of data is commensurate with that expected from the future SuperNova Acceleration Probe (SNAP). We find that the Hubble parameter is especially well-determined and useful for this purpose. The look back time of the universe may also be determined to a very high degree of a","authors_text":"Alexei A. Starobinsky, Arman Shafieloo, Ujjaini Alam, Varun Sahni","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-05-16T20:01:52Z","title":"Smoothing Supernova Data to Reconstruct the Expansion History of the Universe and its Age"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0505329","kind":"arxiv","version":4},"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":"sha256:1b61d66cb2d273a7ef2e1a885e7f75174cdf7a4f866150c4e6e96578cdc5663a","target":"record","created_at":"2026-07-04T17:16:30Z","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":"682add8fcf091d5c0822ab12de7a44458d8de7508aa5d153c8e20e66559d62ed","cross_cats_sorted":["gr-qc","hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-05-16T20:01:52Z","title_canon_sha256":"803f67b6b8da2cb3955c48dcac2b7e824fd50acb4543713a9211b34a359344c2"},"schema_version":"1.0","source":{"id":"astro-ph/0505329","kind":"arxiv","version":4}},"canonical_sha256":"be5ee313ef593bf54964a3dcbb59b6e7fccf429edc0628b2f4cc7684b9e92c2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be5ee313ef593bf54964a3dcbb59b6e7fccf429edc0628b2f4cc7684b9e92c2d","first_computed_at":"2026-07-04T17:16:30.998469Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:16:30.998469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kRoLVJZ4vMUyWu/CZwSoTiuyStx/4l1NMRcaThLE9pFHIJENxSaosA2CBzpNZMtY5JX4G8pJapa4GfY/1VctDw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:16:30.998867Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0505329","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b61d66cb2d273a7ef2e1a885e7f75174cdf7a4f866150c4e6e96578cdc5663a","sha256:347e66ec0d6cd538174e73686965f5d842b07fcb2a219a1af9594db72f27108f"],"state_sha256":"af19474920d12b817822e456e6ffb860b751ea08bc383f4ac3befc8b0a0da805"}