{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ZM6DO3QNQAODK6HU6IMNVV4PKY","short_pith_number":"pith:ZM6DO3QN","canonical_record":{"source":{"id":"1312.4144","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-15T12:21:59Z","cross_cats_sorted":[],"title_canon_sha256":"cfe06ca66b75fd30f6d861dec4b1ec72f3b2d0244a2c919fb7ed4fb7595b475b","abstract_canon_sha256":"d06034798f2e600e0c3a72e45e9a9ca09804337ebbf7a054875ee3e12c6db3c3"},"schema_version":"1.0"},"canonical_sha256":"cb3c376e0d801c3578f4f218dad78f5610d2f80a269ade6729f2d2ee02303fbb","source":{"kind":"arxiv","id":"1312.4144","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.4144","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"arxiv_version","alias_value":"1312.4144v1","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.4144","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"pith_short_12","alias_value":"ZM6DO3QNQAOD","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZM6DO3QNQAODK6HU","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZM6DO3QN","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ZM6DO3QNQAODK6HU6IMNVV4PKY","target":"record","payload":{"canonical_record":{"source":{"id":"1312.4144","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-15T12:21:59Z","cross_cats_sorted":[],"title_canon_sha256":"cfe06ca66b75fd30f6d861dec4b1ec72f3b2d0244a2c919fb7ed4fb7595b475b","abstract_canon_sha256":"d06034798f2e600e0c3a72e45e9a9ca09804337ebbf7a054875ee3e12c6db3c3"},"schema_version":"1.0"},"canonical_sha256":"cb3c376e0d801c3578f4f218dad78f5610d2f80a269ade6729f2d2ee02303fbb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:50.446584Z","signature_b64":"lf6Oh3CfrKOn67Qlt0wbWTIWsFI2VzryKGVKs65521U862moE41LJfTBuirPYYDfbxnkKgirgGiJrASsSFqnDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb3c376e0d801c3578f4f218dad78f5610d2f80a269ade6729f2d2ee02303fbb","last_reissued_at":"2026-05-18T01:45:50.446203Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:50.446203Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.4144","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":"2026-05-18T01:45:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uC/qR3+e5Jkz2lXnPQgmjebAZKc/pR7kzTeCv9u8koBRptV1KG5SVMIKmpQPU6gB8e+RrCnHX17brRVeLQ3uBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:33:08.650674Z"},"content_sha256":"3d860d805f9d41b026f868b3735d972a031c7c3c667c950f2118ff93c68eccc4","schema_version":"1.0","event_id":"sha256:3d860d805f9d41b026f868b3735d972a031c7c3c667c950f2118ff93c68eccc4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ZM6DO3QNQAODK6HU6IMNVV4PKY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The surface nitrogen abundance of a massive star in relation to its oscillations, rotation, and magnetic field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Conny Aerts, Coralie Neiner, Geert Molenberghs, Michael G. Kenward","submitted_at":"2013-12-15T12:21:59Z","abstract_excerpt":"We have composed a sample of 68 massive stars in our galaxy whose projected rotational velocity, effective temperature and gravity are available from high-precision spectroscopic measurements. The additional seven observed variables considered here are their surface nitrogen abundance, rotational frequency, magnetic field strength, and the amplitude and frequency of their dominant acoustic and gravity mode of oscillation. Multiple linear regression to estimate the nitrogen abundance combined with principal components analysis, after addressing the incomplete and truncated nature of the data, r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.4144","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":"2026-05-18T01:45:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oOfdMqbuvcq3DBSNEa8f5vRTFItISKo39gPSVS0P2CjIqG/Yr5G3Nusw6rqrPPt4ZYyJBGPzvfvADjx9gX1ACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:33:08.651309Z"},"content_sha256":"1006a7808f6afdcba799a787fcf9ec43e98ea64aab30e8fda4c3b8734fe6a12d","schema_version":"1.0","event_id":"sha256:1006a7808f6afdcba799a787fcf9ec43e98ea64aab30e8fda4c3b8734fe6a12d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/bundle.json","state_url":"https://pith.science/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/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":"2026-05-31T12:33:08Z","links":{"resolver":"https://pith.science/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY","bundle":"https://pith.science/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/bundle.json","state":"https://pith.science/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZM6DO3QNQAODK6HU6IMNVV4PKY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ZM6DO3QNQAODK6HU6IMNVV4PKY","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":"d06034798f2e600e0c3a72e45e9a9ca09804337ebbf7a054875ee3e12c6db3c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-15T12:21:59Z","title_canon_sha256":"cfe06ca66b75fd30f6d861dec4b1ec72f3b2d0244a2c919fb7ed4fb7595b475b"},"schema_version":"1.0","source":{"id":"1312.4144","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.4144","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"arxiv_version","alias_value":"1312.4144v1","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.4144","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"pith_short_12","alias_value":"ZM6DO3QNQAOD","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZM6DO3QNQAODK6HU","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZM6DO3QN","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:1006a7808f6afdcba799a787fcf9ec43e98ea64aab30e8fda4c3b8734fe6a12d","target":"graph","created_at":"2026-05-18T01:45:50Z","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":"We have composed a sample of 68 massive stars in our galaxy whose projected rotational velocity, effective temperature and gravity are available from high-precision spectroscopic measurements. The additional seven observed variables considered here are their surface nitrogen abundance, rotational frequency, magnetic field strength, and the amplitude and frequency of their dominant acoustic and gravity mode of oscillation. Multiple linear regression to estimate the nitrogen abundance combined with principal components analysis, after addressing the incomplete and truncated nature of the data, r","authors_text":"Conny Aerts, Coralie Neiner, Geert Molenberghs, Michael G. Kenward","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-15T12:21:59Z","title":"The surface nitrogen abundance of a massive star in relation to its oscillations, rotation, and magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.4144","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":"sha256:3d860d805f9d41b026f868b3735d972a031c7c3c667c950f2118ff93c68eccc4","target":"record","created_at":"2026-05-18T01:45:50Z","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":"d06034798f2e600e0c3a72e45e9a9ca09804337ebbf7a054875ee3e12c6db3c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-15T12:21:59Z","title_canon_sha256":"cfe06ca66b75fd30f6d861dec4b1ec72f3b2d0244a2c919fb7ed4fb7595b475b"},"schema_version":"1.0","source":{"id":"1312.4144","kind":"arxiv","version":1}},"canonical_sha256":"cb3c376e0d801c3578f4f218dad78f5610d2f80a269ade6729f2d2ee02303fbb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb3c376e0d801c3578f4f218dad78f5610d2f80a269ade6729f2d2ee02303fbb","first_computed_at":"2026-05-18T01:45:50.446203Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:50.446203Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lf6Oh3CfrKOn67Qlt0wbWTIWsFI2VzryKGVKs65521U862moE41LJfTBuirPYYDfbxnkKgirgGiJrASsSFqnDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:50.446584Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.4144","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d860d805f9d41b026f868b3735d972a031c7c3c667c950f2118ff93c68eccc4","sha256:1006a7808f6afdcba799a787fcf9ec43e98ea64aab30e8fda4c3b8734fe6a12d"],"state_sha256":"96894f657c5658eb99c4b7ab0fc9b018e19d67ed16ee94de4730919f994656c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Jne4ZNPZkneAf5CdcuP41/XOap6jaQfPfOv8HZ0FfDb+GVG4q0XbuNEz20hAnMRDRa1QJGCE6N7WWLaMq/oDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T12:33:08.654889Z","bundle_sha256":"5383ecd299d358f90d4db9ea503edb39638263417a3f4846ebdbf36a572780ce"}}