{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:5PWFL5ITRZHU2CQTF5BMKBKQAN","short_pith_number":"pith:5PWFL5IT","canonical_record":{"source":{"id":"1110.5148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-10-24T07:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"286f0071788ccfcfff70b2c508713787e43ec243a5bbede554414496deb1d653","abstract_canon_sha256":"39796e1d5afb306d5174e4510764c2630d53ac228e58f0310279f6f64a060a4c"},"schema_version":"1.0"},"canonical_sha256":"ebec55f5138e4f4d0a132f42c5055003629b1d2117f437003c66eab66d9dcb39","source":{"kind":"arxiv","id":"1110.5148","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.5148","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"arxiv_version","alias_value":"1110.5148v1","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.5148","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"pith_short_12","alias_value":"5PWFL5ITRZHU","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5PWFL5ITRZHU2CQT","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5PWFL5IT","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:5PWFL5ITRZHU2CQTF5BMKBKQAN","target":"record","payload":{"canonical_record":{"source":{"id":"1110.5148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-10-24T07:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"286f0071788ccfcfff70b2c508713787e43ec243a5bbede554414496deb1d653","abstract_canon_sha256":"39796e1d5afb306d5174e4510764c2630d53ac228e58f0310279f6f64a060a4c"},"schema_version":"1.0"},"canonical_sha256":"ebec55f5138e4f4d0a132f42c5055003629b1d2117f437003c66eab66d9dcb39","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:06.511802Z","signature_b64":"yH25J6iJ5qUpNgEE34bqBkg9YukqKLh62fP+V3SOrNXTFAyfoPNVuafU1ATi5Y/UL5f2JdeEtRq3hhCyO4oTDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ebec55f5138e4f4d0a132f42c5055003629b1d2117f437003c66eab66d9dcb39","last_reissued_at":"2026-05-18T02:00:06.511277Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:06.511277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.5148","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":"2026-05-18T02:00:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oan4uVpkBtzaTjypaLSz9Lp6NpiJY2bGj1SvvBoK0shB1XrrBE5BTHe75B2SDB1lSoDyRoktZ3StX0ELqACgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:22:43.723808Z"},"content_sha256":"1a9b516611bd52fbceba03febc502acbeebaa24946d4a44df5722783d8a65fce","schema_version":"1.0","event_id":"sha256:1a9b516611bd52fbceba03febc502acbeebaa24946d4a44df5722783d8a65fce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:5PWFL5ITRZHU2CQTF5BMKBKQAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nitrogen line spectroscopy in O-stars -- II. Surface nitrogen abundances for O-stars in the Large Magellanic Cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"F. Najarro, I. Brott, J.G. Rivero Gonzalez, J. Puls","submitted_at":"2011-10-24T07:39:26Z","abstract_excerpt":"This is the second paper in a series aiming at the analysis of nitrogen abundances in O-type stars, to enable further constraints on the early evolution of massive stars. We investigate the NIV lambda4058 emission line formation, provide nitrogen abundances for a substantial O-star sample in the LMC, and compare our findings with recent predictions from stellar evolutionary models. Stellar and wind parameters are determined by line profile fitting of hydrogen, helium and nitrogen lines, based on synthetic spectra calculated by FASTWIND. We derive nitrogen abundances for 20 O- and 5 B-stars, by"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.5148","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":"2026-05-18T02:00:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W08MnTJdpyOAkDiHSx45ibvk8DNlDTYmGozln7abOH8n7/b0sBYVjmiqhgfbX2sUO/AUppgiaLVsfUeXRyMJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:22:43.724150Z"},"content_sha256":"0947ab1bdb4fd39001c0c076d90eba42a4fc90f352011ac232a0ad7ee2e189f4","schema_version":"1.0","event_id":"sha256:0947ab1bdb4fd39001c0c076d90eba42a4fc90f352011ac232a0ad7ee2e189f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/bundle.json","state_url":"https://pith.science/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/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":"2026-06-04T19:22:43Z","links":{"resolver":"https://pith.science/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN","bundle":"https://pith.science/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/bundle.json","state":"https://pith.science/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5PWFL5ITRZHU2CQTF5BMKBKQAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:5PWFL5ITRZHU2CQTF5BMKBKQAN","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":"39796e1d5afb306d5174e4510764c2630d53ac228e58f0310279f6f64a060a4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-10-24T07:39:26Z","title_canon_sha256":"286f0071788ccfcfff70b2c508713787e43ec243a5bbede554414496deb1d653"},"schema_version":"1.0","source":{"id":"1110.5148","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.5148","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"arxiv_version","alias_value":"1110.5148v1","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.5148","created_at":"2026-05-18T02:00:06Z"},{"alias_kind":"pith_short_12","alias_value":"5PWFL5ITRZHU","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5PWFL5ITRZHU2CQT","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5PWFL5IT","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:0947ab1bdb4fd39001c0c076d90eba42a4fc90f352011ac232a0ad7ee2e189f4","target":"graph","created_at":"2026-05-18T02:00:06Z","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":"This is the second paper in a series aiming at the analysis of nitrogen abundances in O-type stars, to enable further constraints on the early evolution of massive stars. We investigate the NIV lambda4058 emission line formation, provide nitrogen abundances for a substantial O-star sample in the LMC, and compare our findings with recent predictions from stellar evolutionary models. Stellar and wind parameters are determined by line profile fitting of hydrogen, helium and nitrogen lines, based on synthetic spectra calculated by FASTWIND. We derive nitrogen abundances for 20 O- and 5 B-stars, by","authors_text":"F. Najarro, I. Brott, J.G. Rivero Gonzalez, J. Puls","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-10-24T07:39:26Z","title":"Nitrogen line spectroscopy in O-stars -- II. Surface nitrogen abundances for O-stars in the Large Magellanic Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.5148","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":"sha256:1a9b516611bd52fbceba03febc502acbeebaa24946d4a44df5722783d8a65fce","target":"record","created_at":"2026-05-18T02:00:06Z","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":"39796e1d5afb306d5174e4510764c2630d53ac228e58f0310279f6f64a060a4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-10-24T07:39:26Z","title_canon_sha256":"286f0071788ccfcfff70b2c508713787e43ec243a5bbede554414496deb1d653"},"schema_version":"1.0","source":{"id":"1110.5148","kind":"arxiv","version":1}},"canonical_sha256":"ebec55f5138e4f4d0a132f42c5055003629b1d2117f437003c66eab66d9dcb39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ebec55f5138e4f4d0a132f42c5055003629b1d2117f437003c66eab66d9dcb39","first_computed_at":"2026-05-18T02:00:06.511277Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:06.511277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yH25J6iJ5qUpNgEE34bqBkg9YukqKLh62fP+V3SOrNXTFAyfoPNVuafU1ATi5Y/UL5f2JdeEtRq3hhCyO4oTDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:06.511802Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.5148","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a9b516611bd52fbceba03febc502acbeebaa24946d4a44df5722783d8a65fce","sha256:0947ab1bdb4fd39001c0c076d90eba42a4fc90f352011ac232a0ad7ee2e189f4"],"state_sha256":"05d802e9a7b8b58fe45c42b522df0a378bf0f4aafd666dd8ae4d9cd60ff1e535"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B92vAWihFFZKX+066RUb1UwOxPlasu4/v0oybvMQpcjw2uw8SEVLJy8IJdzOES92dFozKyKwl6Eh4lddppLTAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:22:43.726142Z","bundle_sha256":"af7f65abdc8df497f1bb6c4d58a3a047b1a4e3d8f95550d07670bde9d323484c"}}