{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:OJDA2DLYTRCKYSVSYJ26GPECNV","short_pith_number":"pith:OJDA2DLY","canonical_record":{"source":{"id":"astro-ph/0210217","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-09T21:19:01Z","cross_cats_sorted":[],"title_canon_sha256":"2fec6bdfb885f279de70c71dddcd90c65e35b10e51163e70f67925be5b6b3df3","abstract_canon_sha256":"08bc33debb460cbdb769203493e635c2d4038df12237484bdbc90c3e32ec2250"},"schema_version":"1.0"},"canonical_sha256":"72460d0d789c44ac4ab2c275e33c826d735f929c081e65096fb63e2717a750ce","source":{"kind":"arxiv","id":"astro-ph/0210217","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0210217","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0210217v1","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0210217","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"pith_short_12","alias_value":"OJDA2DLYTRCK","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"OJDA2DLYTRCKYSVS","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"OJDA2DLY","created_at":"2026-05-18T12:25:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:OJDA2DLYTRCKYSVSYJ26GPECNV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0210217","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-09T21:19:01Z","cross_cats_sorted":[],"title_canon_sha256":"2fec6bdfb885f279de70c71dddcd90c65e35b10e51163e70f67925be5b6b3df3","abstract_canon_sha256":"08bc33debb460cbdb769203493e635c2d4038df12237484bdbc90c3e32ec2250"},"schema_version":"1.0"},"canonical_sha256":"72460d0d789c44ac4ab2c275e33c826d735f929c081e65096fb63e2717a750ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:17.719169Z","signature_b64":"sQRM3rEb6EgsPCNuKDodt4wHV5iLNz+JPbhlppHhXyvodQFVEYbJBNEh/M62PP17BK+oG75tJj2nys/v0TxsBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72460d0d789c44ac4ab2c275e33c826d735f929c081e65096fb63e2717a750ce","last_reissued_at":"2026-05-18T00:37:17.718576Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:17.718576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0210217","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:37:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3yF4Ig+ebz0VKqTNyepBsuFf2K06zOhsi+aeqVw5WiE7iuaLNJAJtpp1IxTM42AhuE+51khqWnhGR3tau8W7Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:26:05.489291Z"},"content_sha256":"41fc5d716c3462d8110fdee7201ad7977092d0979336730385d0f8e72423ce3b","schema_version":"1.0","event_id":"sha256:41fc5d716c3462d8110fdee7201ad7977092d0979336730385d0f8e72423ce3b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:OJDA2DLYTRCKYSVSYJ26GPECNV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing Dark Energy with SNAP","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Eric V. Linder","submitted_at":"2002-10-09T21:19:01Z","abstract_excerpt":"The distance-redshift relation observed for supernovae has led to the discovery that the expansion of the universe is accelerating. A next generation experiment, the Supernova/Acceleration Probe (SNAP), can investigate the nature of the dark energy responsible, determining its energy density contribution and equation of state. In addition, indications of time variation in the equation of state could provide critical clues to the underlying fundamental physics; we show how SNAP can achieve 3 sigma detection of such time variation in some cases."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210217","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:37:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+g1p6CwWKB5VprYejRprnrU3IUUEFSRr83kWuIODFbX74yDC6CQDSblF5VJgQLTs3lTiuw+KvdStMlsg22wNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:26:05.489656Z"},"content_sha256":"f60216c29a32fef493f19936ae8fdd438559d9d6f5c64f5e0aae07cf9dbd8e64","schema_version":"1.0","event_id":"sha256:f60216c29a32fef493f19936ae8fdd438559d9d6f5c64f5e0aae07cf9dbd8e64"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/bundle.json","state_url":"https://pith.science/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T01:26:05Z","links":{"resolver":"https://pith.science/pith/OJDA2DLYTRCKYSVSYJ26GPECNV","bundle":"https://pith.science/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/bundle.json","state":"https://pith.science/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJDA2DLYTRCKYSVSYJ26GPECNV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:OJDA2DLYTRCKYSVSYJ26GPECNV","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":"08bc33debb460cbdb769203493e635c2d4038df12237484bdbc90c3e32ec2250","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-09T21:19:01Z","title_canon_sha256":"2fec6bdfb885f279de70c71dddcd90c65e35b10e51163e70f67925be5b6b3df3"},"schema_version":"1.0","source":{"id":"astro-ph/0210217","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0210217","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0210217v1","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0210217","created_at":"2026-05-18T00:37:17Z"},{"alias_kind":"pith_short_12","alias_value":"OJDA2DLYTRCK","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"OJDA2DLYTRCKYSVS","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"OJDA2DLY","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:f60216c29a32fef493f19936ae8fdd438559d9d6f5c64f5e0aae07cf9dbd8e64","target":"graph","created_at":"2026-05-18T00:37:17Z","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 distance-redshift relation observed for supernovae has led to the discovery that the expansion of the universe is accelerating. A next generation experiment, the Supernova/Acceleration Probe (SNAP), can investigate the nature of the dark energy responsible, determining its energy density contribution and equation of state. In addition, indications of time variation in the equation of state could provide critical clues to the underlying fundamental physics; we show how SNAP can achieve 3 sigma detection of such time variation in some cases.","authors_text":"Eric V. Linder","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-10-09T21:19:01Z","title":"Probing Dark Energy with SNAP"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210217","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":"sha256:41fc5d716c3462d8110fdee7201ad7977092d0979336730385d0f8e72423ce3b","target":"record","created_at":"2026-05-18T00:37:17Z","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":"08bc33debb460cbdb769203493e635c2d4038df12237484bdbc90c3e32ec2250","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-09T21:19:01Z","title_canon_sha256":"2fec6bdfb885f279de70c71dddcd90c65e35b10e51163e70f67925be5b6b3df3"},"schema_version":"1.0","source":{"id":"astro-ph/0210217","kind":"arxiv","version":1}},"canonical_sha256":"72460d0d789c44ac4ab2c275e33c826d735f929c081e65096fb63e2717a750ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72460d0d789c44ac4ab2c275e33c826d735f929c081e65096fb63e2717a750ce","first_computed_at":"2026-05-18T00:37:17.718576Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:17.718576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sQRM3rEb6EgsPCNuKDodt4wHV5iLNz+JPbhlppHhXyvodQFVEYbJBNEh/M62PP17BK+oG75tJj2nys/v0TxsBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:17.719169Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0210217","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41fc5d716c3462d8110fdee7201ad7977092d0979336730385d0f8e72423ce3b","sha256:f60216c29a32fef493f19936ae8fdd438559d9d6f5c64f5e0aae07cf9dbd8e64"],"state_sha256":"1b78b4213c93f14fe1852abdaf7e5c27e867c9afd3345ca92ab02f8b89afa78f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SWDEcsqpoqDvj8ED5TkKOTiuy80rfdQ+MPvEUCkHOKulnI4G0NNCMUl0VS18JrpFL/hv1ICO4pn9jSdnEgzlDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:26:05.491673Z","bundle_sha256":"ac87ec0e046ceb22f6d7869690cfa28aa50ce117031c293d68f9ebcf48897c2a"}}