{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:NVFFL3ZZGRKWVFVB52D3NXKVQ4","short_pith_number":"pith:NVFFL3ZZ","canonical_record":{"source":{"id":"1510.05908","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-20T14:23:44Z","cross_cats_sorted":[],"title_canon_sha256":"76ae425f905c881c774cf842bd1171f4c789c54a2368ee3043f9b865e95ac33a","abstract_canon_sha256":"2639ae50aefe7c3fd6602149c93062f76d2ab0b0ffb81eba85cbe75646bca90f"},"schema_version":"1.0"},"canonical_sha256":"6d4a55ef3934556a96a1ee87b6dd55871f36d5babda9e37986c885afb14259a3","source":{"kind":"arxiv","id":"1510.05908","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.05908","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"arxiv_version","alias_value":"1510.05908v1","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.05908","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"pith_short_12","alias_value":"NVFFL3ZZGRKW","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"NVFFL3ZZGRKWVFVB","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"NVFFL3ZZ","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:NVFFL3ZZGRKWVFVB52D3NXKVQ4","target":"record","payload":{"canonical_record":{"source":{"id":"1510.05908","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-20T14:23:44Z","cross_cats_sorted":[],"title_canon_sha256":"76ae425f905c881c774cf842bd1171f4c789c54a2368ee3043f9b865e95ac33a","abstract_canon_sha256":"2639ae50aefe7c3fd6602149c93062f76d2ab0b0ffb81eba85cbe75646bca90f"},"schema_version":"1.0"},"canonical_sha256":"6d4a55ef3934556a96a1ee87b6dd55871f36d5babda9e37986c885afb14259a3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:04.349912Z","signature_b64":"ts/qShaUb+biHhWoFXx8tIsnGrfFJKXjbsLq/2M0GcKi6mxazr0rjHCLmlnXhwnuJVTJ6fAJR0UuCjSDUt28Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d4a55ef3934556a96a1ee87b6dd55871f36d5babda9e37986c885afb14259a3","last_reissued_at":"2026-05-18T01:21:04.349195Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:04.349195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.05908","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":"2026-05-18T01:21:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2hnB/epqRhJF0iO06pDRwrsgWh8CNJ8fZmBg3bc2KMoRmtw7DSAK6ACA288S/Y/J9wWyZU0cHIWUkxFHImw6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:15:15.077865Z"},"content_sha256":"3139326fe1d3142e2ed9b0e1bf6feb1520c57df9c870ae79fe556f75911e1246","schema_version":"1.0","event_id":"sha256:3139326fe1d3142e2ed9b0e1bf6feb1520c57df9c870ae79fe556f75911e1246"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:NVFFL3ZZGRKWVFVB52D3NXKVQ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"To Ba or not to Ba: Enrichment in s-process elements in binary systems with WD companions of various masses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Jorissen, H. Van Winckel, S. Van Eck, T. Masseron, T. Merle","submitted_at":"2015-10-20T14:23:44Z","abstract_excerpt":"The enrichment in s-process elements of barium stars is known to be due to pollution by mass transfer from a companion formerly on the thermally-pulsing asymptotic giant branch (AGB), now a carbon-oxygen white-dwarf (WD). This paper investigates the relationship between the s-process enrichment in the barium star and the mass of its WD companion. It is expected that helium WDs, which have masses smaller than about 0.5 Msun and never reached the AGB phase, should not pollute with s-process elements their giant companion, which should thus never turn into a barium star. Spectra with a resolution"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05908","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":"2026-05-18T01:21:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cL7nWdOlOoSETwjJfZVUPdy04yhhaiKNKfGsuRNToSjR4LXvK2iREM6VkMtJyFpaTWYs0RoO0bjaHLOgGwdbBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:15:15.078223Z"},"content_sha256":"fd97842992102ac9345b9b4229796024dba89690a2e4e5b6dc46b02a34ac563a","schema_version":"1.0","event_id":"sha256:fd97842992102ac9345b9b4229796024dba89690a2e4e5b6dc46b02a34ac563a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/bundle.json","state_url":"https://pith.science/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/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":"2026-05-28T12:15:15Z","links":{"resolver":"https://pith.science/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4","bundle":"https://pith.science/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/bundle.json","state":"https://pith.science/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NVFFL3ZZGRKWVFVB52D3NXKVQ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:NVFFL3ZZGRKWVFVB52D3NXKVQ4","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":"2639ae50aefe7c3fd6602149c93062f76d2ab0b0ffb81eba85cbe75646bca90f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-20T14:23:44Z","title_canon_sha256":"76ae425f905c881c774cf842bd1171f4c789c54a2368ee3043f9b865e95ac33a"},"schema_version":"1.0","source":{"id":"1510.05908","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.05908","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"arxiv_version","alias_value":"1510.05908v1","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.05908","created_at":"2026-05-18T01:21:04Z"},{"alias_kind":"pith_short_12","alias_value":"NVFFL3ZZGRKW","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"NVFFL3ZZGRKWVFVB","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"NVFFL3ZZ","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:fd97842992102ac9345b9b4229796024dba89690a2e4e5b6dc46b02a34ac563a","target":"graph","created_at":"2026-05-18T01:21:04Z","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":"The enrichment in s-process elements of barium stars is known to be due to pollution by mass transfer from a companion formerly on the thermally-pulsing asymptotic giant branch (AGB), now a carbon-oxygen white-dwarf (WD). This paper investigates the relationship between the s-process enrichment in the barium star and the mass of its WD companion. It is expected that helium WDs, which have masses smaller than about 0.5 Msun and never reached the AGB phase, should not pollute with s-process elements their giant companion, which should thus never turn into a barium star. Spectra with a resolution","authors_text":"A. Jorissen, H. Van Winckel, S. Van Eck, T. Masseron, T. Merle","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-20T14:23:44Z","title":"To Ba or not to Ba: Enrichment in s-process elements in binary systems with WD companions of various masses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05908","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":"sha256:3139326fe1d3142e2ed9b0e1bf6feb1520c57df9c870ae79fe556f75911e1246","target":"record","created_at":"2026-05-18T01:21:04Z","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":"2639ae50aefe7c3fd6602149c93062f76d2ab0b0ffb81eba85cbe75646bca90f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-20T14:23:44Z","title_canon_sha256":"76ae425f905c881c774cf842bd1171f4c789c54a2368ee3043f9b865e95ac33a"},"schema_version":"1.0","source":{"id":"1510.05908","kind":"arxiv","version":1}},"canonical_sha256":"6d4a55ef3934556a96a1ee87b6dd55871f36d5babda9e37986c885afb14259a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d4a55ef3934556a96a1ee87b6dd55871f36d5babda9e37986c885afb14259a3","first_computed_at":"2026-05-18T01:21:04.349195Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:04.349195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ts/qShaUb+biHhWoFXx8tIsnGrfFJKXjbsLq/2M0GcKi6mxazr0rjHCLmlnXhwnuJVTJ6fAJR0UuCjSDUt28Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:04.349912Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.05908","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3139326fe1d3142e2ed9b0e1bf6feb1520c57df9c870ae79fe556f75911e1246","sha256:fd97842992102ac9345b9b4229796024dba89690a2e4e5b6dc46b02a34ac563a"],"state_sha256":"c18a9e5d09d031e3ce905aab6fb7cbd55a57b34570e7390137030b686380768f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9cigh7CihrmesNQ7f9SHfwbDK093ANr8lElCABQHZTFaMoFSQREW3qiiOp/EFtjdw4yy9G5InlYbheMSLTirAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T12:15:15.080108Z","bundle_sha256":"1d9e7e0e2e11ccf717a9ed78f62f9e3f94a194795826dfd57df4206f804f8ed3"}}