{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:RU4U6SJDY7II73M4ANFTANGRUZ","short_pith_number":"pith:RU4U6SJD","canonical_record":{"source":{"id":"astro-ph/0012072","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-04T12:05:25Z","cross_cats_sorted":[],"title_canon_sha256":"011385bf5e1847c971a722b5311f91962933f1f9c91062e1fcd38dc3ae6202d4","abstract_canon_sha256":"54803fa9e6e81040b2603c26cd1968dfaf148bce1a6ef1a63aef33ec87ad9133"},"schema_version":"1.0"},"canonical_sha256":"8d394f4923c7d08fed9c034b3034d1a673ca53469e7f0cdaf9e7ccd910ff3d88","source":{"kind":"arxiv","id":"astro-ph/0012072","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0012072","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0012072v1","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0012072","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"RU4U6SJDY7II","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"RU4U6SJDY7II73M4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"RU4U6SJD","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:RU4U6SJDY7II73M4ANFTANGRUZ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0012072","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-04T12:05:25Z","cross_cats_sorted":[],"title_canon_sha256":"011385bf5e1847c971a722b5311f91962933f1f9c91062e1fcd38dc3ae6202d4","abstract_canon_sha256":"54803fa9e6e81040b2603c26cd1968dfaf148bce1a6ef1a63aef33ec87ad9133"},"schema_version":"1.0"},"canonical_sha256":"8d394f4923c7d08fed9c034b3034d1a673ca53469e7f0cdaf9e7ccd910ff3d88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:46.221620Z","signature_b64":"Dt7OcpFaN9rT3SZkjPdSTyT7A+ZDOqn5r3/xXCSZaVKw3u66+xVrbyuMAJYC2RQGKpjA+yTN4Wq77Cdx2MqcDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d394f4923c7d08fed9c034b3034d1a673ca53469e7f0cdaf9e7ccd910ff3d88","last_reissued_at":"2026-05-18T01:07:46.221068Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:46.221068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0012072","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":"2026-05-18T01:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZMOoidV+vitEYOXW1ifBFjkHw3F4HNhErv2XVTXGdprMqRWtUt8LZeNvZvSjCZVzqQWrShKXU5KuJ7ttoHz6Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:04:57.829903Z"},"content_sha256":"a7d82c6da32b3824e053fb484f616c2d26592769e86863e4156a8c598cde357c","schema_version":"1.0","event_id":"sha256:a7d82c6da32b3824e053fb484f616c2d26592769e86863e4156a8c598cde357c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:RU4U6SJDY7II73M4ANFTANGRUZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Supernovae as stellar objects","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.C. Niemeyer, M. Reinecke, W. Hillebrandt","submitted_at":"2000-12-04T12:05:25Z","abstract_excerpt":"Type Ia supernovae (SN Ia) are generally believed to be the result of the thermonuclear disruption of Chandrasekhar-mass carbon-oxygen white dwarfs, mainly because such thermonuclear explosions can account for the right amount of nickel, which is needed to explain the light curves and the late-time spectra, and the abundances of intermediate-mass nuclei which dominate the spectra near maximum light. Because of their enormous brightness and apparent homogeneity SN Ia have become an important tool to measure cosmological parameters.\n In this article the present understanding of the physics of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0012072","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":"2026-05-18T01:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xHU/6BARyMZBtopsU81AuJH9cI6bfuqs9a9yG3cK6lwvYjoy96kys0EZUAn5l353oJHIIK6yReEbx8jX9/rzCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:04:57.830570Z"},"content_sha256":"7eb92cbc89c3e1a3ffc787c5e69de7749f9d965504d709baecdf02e03302c1dc","schema_version":"1.0","event_id":"sha256:7eb92cbc89c3e1a3ffc787c5e69de7749f9d965504d709baecdf02e03302c1dc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RU4U6SJDY7II73M4ANFTANGRUZ/bundle.json","state_url":"https://pith.science/pith/RU4U6SJDY7II73M4ANFTANGRUZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RU4U6SJDY7II73M4ANFTANGRUZ/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":"2026-05-26T00:04:57Z","links":{"resolver":"https://pith.science/pith/RU4U6SJDY7II73M4ANFTANGRUZ","bundle":"https://pith.science/pith/RU4U6SJDY7II73M4ANFTANGRUZ/bundle.json","state":"https://pith.science/pith/RU4U6SJDY7II73M4ANFTANGRUZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RU4U6SJDY7II73M4ANFTANGRUZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:RU4U6SJDY7II73M4ANFTANGRUZ","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":"54803fa9e6e81040b2603c26cd1968dfaf148bce1a6ef1a63aef33ec87ad9133","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-04T12:05:25Z","title_canon_sha256":"011385bf5e1847c971a722b5311f91962933f1f9c91062e1fcd38dc3ae6202d4"},"schema_version":"1.0","source":{"id":"astro-ph/0012072","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0012072","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0012072v1","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0012072","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"RU4U6SJDY7II","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"RU4U6SJDY7II73M4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"RU4U6SJD","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:7eb92cbc89c3e1a3ffc787c5e69de7749f9d965504d709baecdf02e03302c1dc","target":"graph","created_at":"2026-05-18T01:07:46Z","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":"Type Ia supernovae (SN Ia) are generally believed to be the result of the thermonuclear disruption of Chandrasekhar-mass carbon-oxygen white dwarfs, mainly because such thermonuclear explosions can account for the right amount of nickel, which is needed to explain the light curves and the late-time spectra, and the abundances of intermediate-mass nuclei which dominate the spectra near maximum light. Because of their enormous brightness and apparent homogeneity SN Ia have become an important tool to measure cosmological parameters.\n In this article the present understanding of the physics of th","authors_text":"J.C. Niemeyer, M. Reinecke, W. Hillebrandt","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-12-04T12:05:25Z","title":"Supernovae as stellar objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0012072","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:a7d82c6da32b3824e053fb484f616c2d26592769e86863e4156a8c598cde357c","target":"record","created_at":"2026-05-18T01:07:46Z","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":"54803fa9e6e81040b2603c26cd1968dfaf148bce1a6ef1a63aef33ec87ad9133","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-04T12:05:25Z","title_canon_sha256":"011385bf5e1847c971a722b5311f91962933f1f9c91062e1fcd38dc3ae6202d4"},"schema_version":"1.0","source":{"id":"astro-ph/0012072","kind":"arxiv","version":1}},"canonical_sha256":"8d394f4923c7d08fed9c034b3034d1a673ca53469e7f0cdaf9e7ccd910ff3d88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d394f4923c7d08fed9c034b3034d1a673ca53469e7f0cdaf9e7ccd910ff3d88","first_computed_at":"2026-05-18T01:07:46.221068Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:46.221068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dt7OcpFaN9rT3SZkjPdSTyT7A+ZDOqn5r3/xXCSZaVKw3u66+xVrbyuMAJYC2RQGKpjA+yTN4Wq77Cdx2MqcDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:46.221620Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0012072","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a7d82c6da32b3824e053fb484f616c2d26592769e86863e4156a8c598cde357c","sha256:7eb92cbc89c3e1a3ffc787c5e69de7749f9d965504d709baecdf02e03302c1dc"],"state_sha256":"afafc04c6c9bc51919e292001407ce8ced6a60c2b67199f16658c8b56496c699"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zlNJLiRHKuKnrEa+j/PkSmjOuWpIpXZT3L8n9h6UqN04XfIUhVMO1GLtSqMEw4T3XyRIqGDQ2k4Pw9dfpwHpBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T00:04:57.833294Z","bundle_sha256":"a993a5eff916486cbc62b12acefbf2b2fe2d5924f1d2bf2b802dac02c80f8eb0"}}