{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:EP4I7J63UMJO7RCJ5U3YKC537P","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":"240881daae9b5f852db68ae072bbc8cf8842d0913b1f12553b9e3a71d896a7f4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-21T18:30:06Z","title_canon_sha256":"d1272441efab229139513e56b8fad7bf7442244555df064337c5f439ce9bb3f3"},"schema_version":"1.0","source":{"id":"astro-ph/0504481","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504481","created_at":"2026-07-04T16:52:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504481v1","created_at":"2026-07-04T16:52:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504481","created_at":"2026-07-04T16:52:14Z"},{"alias_kind":"pith_short_12","alias_value":"EP4I7J63UMJO","created_at":"2026-07-04T16:52:14Z"},{"alias_kind":"pith_short_16","alias_value":"EP4I7J63UMJO7RCJ","created_at":"2026-07-04T16:52:14Z"},{"alias_kind":"pith_short_8","alias_value":"EP4I7J63","created_at":"2026-07-04T16:52:14Z"}],"graph_snapshots":[{"event_id":"sha256:670c99b15161470b727e598101efc0efcfc28b45401b0de1661484576a34fee9","target":"graph","created_at":"2026-07-04T16:52:14Z","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/0504481/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have obtained high-quality Keck optical spectra at three epochs of the Type Ia supernova 1997ex, whose redshift z is 0.361. The elapsed calendar time between the first two spectra was 24.88 d, and that between the first and third spectra was 30.95 d. In an expanding universe where 1 + z represents the factor by which space has expanded between the emission and detection of light, the amount of aging in the supernova rest frame should be a factor of 1 / (1 + z) smaller than the observed-frame aging; thus, we expect SN 1997ex to have aged 18.28 d and 22.74 d between the first epoch and the se","authors_text":"A. G. Riess, A. V. Filippenko, D. C. Leonard, P. Nugent, R. J. Foley, S. Perlmutter","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-04-21T18:30:06Z","title":"A Definitive Measurement of Time Dilation in the Spectral Evolution of the Moderate-Redshift Type Ia Supernova 1997ex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504481","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":"sha256:7ec94b85c6e1bd4c6fc2e5573b82ebd5b25af5f26c0c65c3596b965d67e07e04","target":"record","created_at":"2026-07-04T16:52:14Z","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":"240881daae9b5f852db68ae072bbc8cf8842d0913b1f12553b9e3a71d896a7f4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-21T18:30:06Z","title_canon_sha256":"d1272441efab229139513e56b8fad7bf7442244555df064337c5f439ce9bb3f3"},"schema_version":"1.0","source":{"id":"astro-ph/0504481","kind":"arxiv","version":1}},"canonical_sha256":"23f88fa7dba312efc449ed37850bbbfbcd07091a49710ca0430391c52d2dbd77","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23f88fa7dba312efc449ed37850bbbfbcd07091a49710ca0430391c52d2dbd77","first_computed_at":"2026-07-04T16:52:14.531029Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:52:14.531029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EAGq3/QIWlQB2Cx65AY6R916tWNJFrObOsoNowZGJEWlT69L8vdAC8/Gl0bh+NtO0SlzhiKQyjoL3EBaPILcDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:52:14.531425Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0504481","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ec94b85c6e1bd4c6fc2e5573b82ebd5b25af5f26c0c65c3596b965d67e07e04","sha256:670c99b15161470b727e598101efc0efcfc28b45401b0de1661484576a34fee9"],"state_sha256":"427949b77500c3699b28ce8913fb00313af143304852872053c0dd557f787bfa"}