{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:YOOFUYYNIJSQYB3WKIOGB234UM","short_pith_number":"pith:YOOFUYYN","canonical_record":{"source":{"id":"2109.00277","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-01T09:39:10Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d01191258cd6e1e5474d8feb5df8223602bb71908ca697f07f393350c7dc6e9a","abstract_canon_sha256":"ca759c1677f849be9c36c25e66b43a2717f5049ff8a8973314c699fa0ab9db5e"},"schema_version":"1.0"},"canonical_sha256":"c39c5a630d42650c0776521c60eb7ca3010d7be630f7a5516578f9105682bbf2","source":{"kind":"arxiv","id":"2109.00277","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00277","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00277v1","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00277","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_12","alias_value":"YOOFUYYNIJSQ","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"YOOFUYYNIJSQYB3W","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"YOOFUYYN","created_at":"2026-07-05T03:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:YOOFUYYNIJSQYB3WKIOGB234UM","target":"record","payload":{"canonical_record":{"source":{"id":"2109.00277","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-01T09:39:10Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d01191258cd6e1e5474d8feb5df8223602bb71908ca697f07f393350c7dc6e9a","abstract_canon_sha256":"ca759c1677f849be9c36c25e66b43a2717f5049ff8a8973314c699fa0ab9db5e"},"schema_version":"1.0"},"canonical_sha256":"c39c5a630d42650c0776521c60eb7ca3010d7be630f7a5516578f9105682bbf2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:26:06.303070Z","signature_b64":"no931duRBEZLhppTADsLDuMG06s3U4hh2/6GJWjPXM7FsN+e9TaDTCA7PYnbnFkZVahjCieGbFmR4kqWTWdnDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c39c5a630d42650c0776521c60eb7ca3010d7be630f7a5516578f9105682bbf2","last_reissued_at":"2026-07-05T03:26:06.302723Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:26:06.302723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.00277","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":"2026-07-05T03:26:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JtJDnoHekRUVnKGwR9WjG2FKX4b6qAFu/ezu86GufdtDyOXA9+mmRQGSxyrBBFNky2YNMy/3cCVM18G4NsGMAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T02:36:14.444456Z"},"content_sha256":"44754ce9828036c14740cafc5451128241c946eb57803be0f510ba4e2c5cd911","schema_version":"1.0","event_id":"sha256:44754ce9828036c14740cafc5451128241c946eb57803be0f510ba4e2c5cd911"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:YOOFUYYNIJSQYB3WKIOGB234UM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Barium lines in high-quality spectra of two metal-poor giants in the Galactic halo","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Chiappini, C. Cort\\'es, C. Kobayashi, C. Morossi, E. Depagne, G. Cescutti, M. Franchini, M. Steffen, M. Valentini, N. Christlieb, P. Di Marcantonio, P. Fran\\c{c}ois","submitted_at":"2021-09-01T09:39:10Z","abstract_excerpt":"Context. Theoretical results showed the possibility that neutron capture elements were produced in the early Universe by two different sources: a frequent s-process source hosted by rotating massive stars, and a rare r-process source hosted most likely by neutron star mergers. The two sources produce barium with different isotopic compositions. Aims. We aim to investigate the lines of barium in two halo stars, HD 6268 and HD 4306. The spectra present an exquisite quality, both in terms of resolution (R > 100'000) and signal-to-noise (400). Due to hyperfine splitting (hfs) effects, barium lines"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00277","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.00277/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:26:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fKfsrPVGQGryhz8NKpUQ1+lr3k8YjFjFroTyqzuN3c2Ul7xYU46ppsfVUmmBXC3Aq1NzijEdCXPxIlW8Tk2JCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T02:36:14.444833Z"},"content_sha256":"eef4adeb30d99fc21af086c463b60ec148a01b3c31277c97376fe2b6305a1824","schema_version":"1.0","event_id":"sha256:eef4adeb30d99fc21af086c463b60ec148a01b3c31277c97376fe2b6305a1824"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YOOFUYYNIJSQYB3WKIOGB234UM/bundle.json","state_url":"https://pith.science/pith/YOOFUYYNIJSQYB3WKIOGB234UM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YOOFUYYNIJSQYB3WKIOGB234UM/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":"2026-07-21T02:36:14Z","links":{"resolver":"https://pith.science/pith/YOOFUYYNIJSQYB3WKIOGB234UM","bundle":"https://pith.science/pith/YOOFUYYNIJSQYB3WKIOGB234UM/bundle.json","state":"https://pith.science/pith/YOOFUYYNIJSQYB3WKIOGB234UM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YOOFUYYNIJSQYB3WKIOGB234UM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:YOOFUYYNIJSQYB3WKIOGB234UM","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":"ca759c1677f849be9c36c25e66b43a2717f5049ff8a8973314c699fa0ab9db5e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-01T09:39:10Z","title_canon_sha256":"d01191258cd6e1e5474d8feb5df8223602bb71908ca697f07f393350c7dc6e9a"},"schema_version":"1.0","source":{"id":"2109.00277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00277","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00277v1","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00277","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_12","alias_value":"YOOFUYYNIJSQ","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"YOOFUYYNIJSQYB3W","created_at":"2026-07-05T03:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"YOOFUYYN","created_at":"2026-07-05T03:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:eef4adeb30d99fc21af086c463b60ec148a01b3c31277c97376fe2b6305a1824","target":"graph","created_at":"2026-07-05T03:26:06Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2109.00277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Context. Theoretical results showed the possibility that neutron capture elements were produced in the early Universe by two different sources: a frequent s-process source hosted by rotating massive stars, and a rare r-process source hosted most likely by neutron star mergers. The two sources produce barium with different isotopic compositions. Aims. We aim to investigate the lines of barium in two halo stars, HD 6268 and HD 4306. The spectra present an exquisite quality, both in terms of resolution (R > 100'000) and signal-to-noise (400). Due to hyperfine splitting (hfs) effects, barium lines","authors_text":"C. Chiappini, C. Cort\\'es, C. Kobayashi, C. Morossi, E. Depagne, G. Cescutti, M. Franchini, M. Steffen, M. Valentini, N. Christlieb, P. Di Marcantonio, P. Fran\\c{c}ois","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-01T09:39:10Z","title":"Barium lines in high-quality spectra of two metal-poor giants in the Galactic halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00277","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":"sha256:44754ce9828036c14740cafc5451128241c946eb57803be0f510ba4e2c5cd911","target":"record","created_at":"2026-07-05T03:26:06Z","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":"ca759c1677f849be9c36c25e66b43a2717f5049ff8a8973314c699fa0ab9db5e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-01T09:39:10Z","title_canon_sha256":"d01191258cd6e1e5474d8feb5df8223602bb71908ca697f07f393350c7dc6e9a"},"schema_version":"1.0","source":{"id":"2109.00277","kind":"arxiv","version":1}},"canonical_sha256":"c39c5a630d42650c0776521c60eb7ca3010d7be630f7a5516578f9105682bbf2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c39c5a630d42650c0776521c60eb7ca3010d7be630f7a5516578f9105682bbf2","first_computed_at":"2026-07-05T03:26:06.302723Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:26:06.302723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"no931duRBEZLhppTADsLDuMG06s3U4hh2/6GJWjPXM7FsN+e9TaDTCA7PYnbnFkZVahjCieGbFmR4kqWTWdnDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:26:06.303070Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.00277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44754ce9828036c14740cafc5451128241c946eb57803be0f510ba4e2c5cd911","sha256:eef4adeb30d99fc21af086c463b60ec148a01b3c31277c97376fe2b6305a1824"],"state_sha256":"3916a5ce012101a1987af40123a3055d100e8420ac20f5abffb6f4ff680c158f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fr60YyG9MnwMX5iEgslRmy8KOpcLzEd+uLCv17wMhufDfOx+FVF4Bvh6OkcKPX854VGdOU52XYO1U4kn2oFOAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-21T02:36:14.446953Z","bundle_sha256":"884b3a465624e59964b4bdd289fa214578578fe790eddf8505b944a0fbe62756"}}