{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2ZRTATAQV5GOCPQNQGXAUL3BKD","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":"7ee482aa4c72c1f90ab55e79b07500e4ef3aaf3ce535c316fb3bc5976051ec83","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-05-20T18:32:14Z","title_canon_sha256":"cde986043b0c1a0cc4709c4a4f742ddb2503b1069d5e85c3cd4dd0bbe955a564"},"schema_version":"1.0","source":{"id":"1205.4444","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.4444","created_at":"2026-05-18T01:57:25Z"},{"alias_kind":"arxiv_version","alias_value":"1205.4444v1","created_at":"2026-05-18T01:57:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.4444","created_at":"2026-05-18T01:57:25Z"},{"alias_kind":"pith_short_12","alias_value":"2ZRTATAQV5GO","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2ZRTATAQV5GOCPQN","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2ZRTATAQ","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:73f6b88b302b4c33ff165e30cfe157d2f4a544943dba34968f8ebe73387a792d","target":"graph","created_at":"2026-05-18T01:57:25Z","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 third 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 provide first theoretical predictions for the NIV4058/NIII4640 emission line ratio in dependence of various parameters, and confront them with results from the analysis of a sample of early LMC/SMC O-stars. Stellar and wind parameters are determined by line profile fitting of H/He/N lines, exploiting the helium and nitrogen ionization balance. Corresponding synthetic spectra are calculated using the NLTE atmospheric code FA","authors_text":"F. Najarro, J.G. Rivero Gonzalez, J. Puls, P. Massey","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-05-20T18:32:14Z","title":"Nitrogen line spectroscopy in O-stars -- III. The earliest O-stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.4444","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":"sha256:69d2cfe4d83232fe919bca9365ad4bdba9bdf04ba879737e23c28d75b1a5aa42","target":"record","created_at":"2026-05-18T01:57:25Z","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":"7ee482aa4c72c1f90ab55e79b07500e4ef3aaf3ce535c316fb3bc5976051ec83","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-05-20T18:32:14Z","title_canon_sha256":"cde986043b0c1a0cc4709c4a4f742ddb2503b1069d5e85c3cd4dd0bbe955a564"},"schema_version":"1.0","source":{"id":"1205.4444","kind":"arxiv","version":1}},"canonical_sha256":"d663304c10af4ce13e0d81ae0a2f6150e1bda1445ab3331e0e72124ce7936cf5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d663304c10af4ce13e0d81ae0a2f6150e1bda1445ab3331e0e72124ce7936cf5","first_computed_at":"2026-05-18T01:57:25.264684Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:25.264684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pcmd4ASgibhFO4QFPuW7l9OzPz5FnEDeCQK6N92Pcu57V7wYjH7nUeUM+jfAHOZXbhOdklGD71zrGSdsh9HpCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:25.265813Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.4444","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69d2cfe4d83232fe919bca9365ad4bdba9bdf04ba879737e23c28d75b1a5aa42","sha256:73f6b88b302b4c33ff165e30cfe157d2f4a544943dba34968f8ebe73387a792d"],"state_sha256":"e4d0ac74d751ec071822a8441fff6893e4b5042e482edfde342cec54ea338caa"}