{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:UIYAPDR7KTPJAJPL4XUNGS7CXF","short_pith_number":"pith:UIYAPDR7","canonical_record":{"source":{"id":"0806.3267","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-19T20:15:15Z","cross_cats_sorted":[],"title_canon_sha256":"45dc27c7f0c540ee38bd63cfeccd225064ef9a95f52f172dfda3d013c13dd22e","abstract_canon_sha256":"cdfb7a6efd8574021767bae56741f7b6d349d40aca5d2e454b46501cb450dd8b"},"schema_version":"1.0"},"canonical_sha256":"a230078e3f54de9025ebe5e8d34be2b962e7ed1eee0682c7d883cc49a18f3e51","source":{"kind":"arxiv","id":"0806.3267","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.3267","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"arxiv_version","alias_value":"0806.3267v2","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.3267","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"pith_short_12","alias_value":"UIYAPDR7KTPJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"UIYAPDR7KTPJAJPL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"UIYAPDR7","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:UIYAPDR7KTPJAJPL4XUNGS7CXF","target":"record","payload":{"canonical_record":{"source":{"id":"0806.3267","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-19T20:15:15Z","cross_cats_sorted":[],"title_canon_sha256":"45dc27c7f0c540ee38bd63cfeccd225064ef9a95f52f172dfda3d013c13dd22e","abstract_canon_sha256":"cdfb7a6efd8574021767bae56741f7b6d349d40aca5d2e454b46501cb450dd8b"},"schema_version":"1.0"},"canonical_sha256":"a230078e3f54de9025ebe5e8d34be2b962e7ed1eee0682c7d883cc49a18f3e51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:41.151735Z","signature_b64":"3vEsrzmrlkiZ0z9NfuGkBFfX1+Sf//eRuSQyfh4eaj/IEMPpn21M6Q+bK/QHAXN4t/VyPybgBc59KlID8fhXDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a230078e3f54de9025ebe5e8d34be2b962e7ed1eee0682c7d883cc49a18f3e51","last_reissued_at":"2026-05-18T04:36:41.151325Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:41.151325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0806.3267","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:36:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"isnpISKe00nRH6NVupU47lZRKfemqGtEL4yXDFcGQQgDUsDvgjsRG18uJbXLYg3SC8mbuRbNuThMxgkNK/3JAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:12:25.195403Z"},"content_sha256":"58f3208903f2ff5edfcdef6dad84ea9fcff154529e1760aaf804057980ac4688","schema_version":"1.0","event_id":"sha256:58f3208903f2ff5edfcdef6dad84ea9fcff154529e1760aaf804057980ac4688"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:UIYAPDR7KTPJAJPL4XUNGS7CXF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Implications of Two Type Ia Supernova Populations for Cosmological Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) LANL), Alexandre Amblard (1), Asantha Cooray (1), Daniel E. Holz (2) ((1) UC Irvine, Devdeep Sarkar (1)","submitted_at":"2008-06-19T20:15:15Z","abstract_excerpt":"Recent work suggests that Type Ia supernovae (SNe) are composed of two distinct populations: prompt and delayed. By explicitly incorporating properties of host galaxies, it may be possible to target and eliminate systematic differences between these two putative populations. However, any resulting {\\em post}-calibration shift in luminosity between the components will cause a redshift-dependent systematic shift in the Hubble diagram. Utilizing an existing sample of 192 SNe Ia, we find that the average luminosity difference between prompt and delayed SNe is constrained to be $(4.5 \\pm 8.9)%$. If"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.3267","kind":"arxiv","version":2},"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":"2026-05-18T04:36:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7DC9RvjVwuvjyowcCqR1jDs8c7z2JqNtjt5pL5cVa+8LtZ7NEpcX17JCM23gkRPPW7opmuPsjVSFInI7NDyuCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:12:25.196160Z"},"content_sha256":"e326812661dd9b09ffe294d5378e454f15c2a7167d9fddeb425914b63ad446bf","schema_version":"1.0","event_id":"sha256:e326812661dd9b09ffe294d5378e454f15c2a7167d9fddeb425914b63ad446bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/bundle.json","state_url":"https://pith.science/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/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":"2026-06-01T04:12:25Z","links":{"resolver":"https://pith.science/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF","bundle":"https://pith.science/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/bundle.json","state":"https://pith.science/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UIYAPDR7KTPJAJPL4XUNGS7CXF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:UIYAPDR7KTPJAJPL4XUNGS7CXF","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":"cdfb7a6efd8574021767bae56741f7b6d349d40aca5d2e454b46501cb450dd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-19T20:15:15Z","title_canon_sha256":"45dc27c7f0c540ee38bd63cfeccd225064ef9a95f52f172dfda3d013c13dd22e"},"schema_version":"1.0","source":{"id":"0806.3267","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.3267","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"arxiv_version","alias_value":"0806.3267v2","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.3267","created_at":"2026-05-18T04:36:41Z"},{"alias_kind":"pith_short_12","alias_value":"UIYAPDR7KTPJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"UIYAPDR7KTPJAJPL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"UIYAPDR7","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:e326812661dd9b09ffe294d5378e454f15c2a7167d9fddeb425914b63ad446bf","target":"graph","created_at":"2026-05-18T04:36:41Z","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":"Recent work suggests that Type Ia supernovae (SNe) are composed of two distinct populations: prompt and delayed. By explicitly incorporating properties of host galaxies, it may be possible to target and eliminate systematic differences between these two putative populations. However, any resulting {\\em post}-calibration shift in luminosity between the components will cause a redshift-dependent systematic shift in the Hubble diagram. Utilizing an existing sample of 192 SNe Ia, we find that the average luminosity difference between prompt and delayed SNe is constrained to be $(4.5 \\pm 8.9)%$. If","authors_text":"(2) LANL), Alexandre Amblard (1), Asantha Cooray (1), Daniel E. Holz (2) ((1) UC Irvine, Devdeep Sarkar (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-19T20:15:15Z","title":"Implications of Two Type Ia Supernova Populations for Cosmological Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.3267","kind":"arxiv","version":2},"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":"sha256:58f3208903f2ff5edfcdef6dad84ea9fcff154529e1760aaf804057980ac4688","target":"record","created_at":"2026-05-18T04:36:41Z","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":"cdfb7a6efd8574021767bae56741f7b6d349d40aca5d2e454b46501cb450dd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-19T20:15:15Z","title_canon_sha256":"45dc27c7f0c540ee38bd63cfeccd225064ef9a95f52f172dfda3d013c13dd22e"},"schema_version":"1.0","source":{"id":"0806.3267","kind":"arxiv","version":2}},"canonical_sha256":"a230078e3f54de9025ebe5e8d34be2b962e7ed1eee0682c7d883cc49a18f3e51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a230078e3f54de9025ebe5e8d34be2b962e7ed1eee0682c7d883cc49a18f3e51","first_computed_at":"2026-05-18T04:36:41.151325Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:41.151325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3vEsrzmrlkiZ0z9NfuGkBFfX1+Sf//eRuSQyfh4eaj/IEMPpn21M6Q+bK/QHAXN4t/VyPybgBc59KlID8fhXDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:41.151735Z","signed_message":"canonical_sha256_bytes"},"source_id":"0806.3267","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58f3208903f2ff5edfcdef6dad84ea9fcff154529e1760aaf804057980ac4688","sha256:e326812661dd9b09ffe294d5378e454f15c2a7167d9fddeb425914b63ad446bf"],"state_sha256":"18c5411d6e7b08fc8c37f6bc867524259819983501fdcbfd7b2de34d58a0d120"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rwXGnC4EDYmm1oN1s9pot36JZfw9cJfU1MaE+9F8RtVFxbzNsw8fUnQxcHulJmPrOwZMdHFjCfwL/rGFku+nCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T04:12:25.199598Z","bundle_sha256":"d82a71786a466c65b9022ecde2c4eb4d34c99c8c0a707a83e6cb0a75214777b0"}}