{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YBNMINKHJVODMKWT52CS7YEJ7N","short_pith_number":"pith:YBNMINKH","canonical_record":{"source":{"id":"1804.03114","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T17:26:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"64044c3d87720b81cae3a99d66d531cb6681cc43d27128bd6a917367c54eb99a","abstract_canon_sha256":"50337f5a4fe27eeec4881fd8670d651ff08d17f8ba3ba99b9989309a34f44aea"},"schema_version":"1.0"},"canonical_sha256":"c05ac435474d5c362ad3ee852fe089fb61883a77bafa75cac13bab545dda8ca2","source":{"kind":"arxiv","id":"1804.03114","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.03114","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.03114v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.03114","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"YBNMINKHJVOD","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YBNMINKHJVODMKWT","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YBNMINKH","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YBNMINKHJVODMKWT52CS7YEJ7N","target":"record","payload":{"canonical_record":{"source":{"id":"1804.03114","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T17:26:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"64044c3d87720b81cae3a99d66d531cb6681cc43d27128bd6a917367c54eb99a","abstract_canon_sha256":"50337f5a4fe27eeec4881fd8670d651ff08d17f8ba3ba99b9989309a34f44aea"},"schema_version":"1.0"},"canonical_sha256":"c05ac435474d5c362ad3ee852fe089fb61883a77bafa75cac13bab545dda8ca2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:14.696758Z","signature_b64":"UTvO7uKl8IWX0mMD+q8WnXgR9atPg23f5cJDjcbxp/Q3CwiMj2vALagM3YX4jff3qHDnMRkXL95sqaq2fRPVBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c05ac435474d5c362ad3ee852fe089fb61883a77bafa75cac13bab545dda8ca2","last_reissued_at":"2026-05-18T00:15:14.696053Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:14.696053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.03114","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/XmDeEosRdY1iwjd0qZU6lNPTOhDYIjTMslfshBus3z6KYptwbFH3H3Ym86xA1RhajxRfxmHZej2aG+HeJO6CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:57:58.450191Z"},"content_sha256":"b87b955434fb3ec5d7cf27a33cf8341b38104bc7cd1924575ba85419a783bea4","schema_version":"1.0","event_id":"sha256:b87b955434fb3ec5d7cf27a33cf8341b38104bc7cd1924575ba85419a783bea4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YBNMINKHJVODMKWT52CS7YEJ7N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The $R$-Process Alliance: First Release from the Southern Search for $r$-Process-Enhanced Stars in the Galactic Halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Anna Frebel, Charli M. Sakari, Erika M. Holmbeck, Ian B. Thompson, Ian U. Roederer, Joshua D. Simon, Terese T. Hansen, Timothy C. Beers, Vinicius M. Placco","submitted_at":"2018-04-09T17:26:13Z","abstract_excerpt":"The recent detection of a binary neutron star merger and the clear evidence for the decay of radioactive material observed in this event have, after sixty years of effort, provided an astrophysical site for the rapid neutron-capture ($r$-) process which is responsible for the production of the heaviest elements in our Universe. However, observations of metal-poor stars with highly-enhanced $r$-process elements have revealed abundance patterns suggesting that multiple sites may be involved. To address this issue, and to advance our understanding of the $r$-process, we have initiated an extensiv"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.03114","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QBGRVrS7rxivT3wwQbtx7gaSvgRKq4EBpqz4X+saNz6zJh1nKV064HB8Wt83d//ZneTdmRWhZzZe7kTV3U4nAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:57:58.450707Z"},"content_sha256":"dfa6dc889e468010d479f2748630d5a0491208a5eb967b2e3e6c456bc34ad30d","schema_version":"1.0","event_id":"sha256:dfa6dc889e468010d479f2748630d5a0491208a5eb967b2e3e6c456bc34ad30d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YBNMINKHJVODMKWT52CS7YEJ7N/bundle.json","state_url":"https://pith.science/pith/YBNMINKHJVODMKWT52CS7YEJ7N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YBNMINKHJVODMKWT52CS7YEJ7N/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":"2026-05-30T20:57:58Z","links":{"resolver":"https://pith.science/pith/YBNMINKHJVODMKWT52CS7YEJ7N","bundle":"https://pith.science/pith/YBNMINKHJVODMKWT52CS7YEJ7N/bundle.json","state":"https://pith.science/pith/YBNMINKHJVODMKWT52CS7YEJ7N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YBNMINKHJVODMKWT52CS7YEJ7N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YBNMINKHJVODMKWT52CS7YEJ7N","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":"50337f5a4fe27eeec4881fd8670d651ff08d17f8ba3ba99b9989309a34f44aea","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T17:26:13Z","title_canon_sha256":"64044c3d87720b81cae3a99d66d531cb6681cc43d27128bd6a917367c54eb99a"},"schema_version":"1.0","source":{"id":"1804.03114","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.03114","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.03114v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.03114","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"YBNMINKHJVOD","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YBNMINKHJVODMKWT","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YBNMINKH","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:dfa6dc889e468010d479f2748630d5a0491208a5eb967b2e3e6c456bc34ad30d","target":"graph","created_at":"2026-05-18T00:15:14Z","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 recent detection of a binary neutron star merger and the clear evidence for the decay of radioactive material observed in this event have, after sixty years of effort, provided an astrophysical site for the rapid neutron-capture ($r$-) process which is responsible for the production of the heaviest elements in our Universe. However, observations of metal-poor stars with highly-enhanced $r$-process elements have revealed abundance patterns suggesting that multiple sites may be involved. To address this issue, and to advance our understanding of the $r$-process, we have initiated an extensiv","authors_text":"Anna Frebel, Charli M. Sakari, Erika M. Holmbeck, Ian B. Thompson, Ian U. Roederer, Joshua D. Simon, Terese T. Hansen, Timothy C. Beers, Vinicius M. Placco","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T17:26:13Z","title":"The $R$-Process Alliance: First Release from the Southern Search for $r$-Process-Enhanced Stars in the Galactic Halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.03114","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:b87b955434fb3ec5d7cf27a33cf8341b38104bc7cd1924575ba85419a783bea4","target":"record","created_at":"2026-05-18T00:15:14Z","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":"50337f5a4fe27eeec4881fd8670d651ff08d17f8ba3ba99b9989309a34f44aea","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T17:26:13Z","title_canon_sha256":"64044c3d87720b81cae3a99d66d531cb6681cc43d27128bd6a917367c54eb99a"},"schema_version":"1.0","source":{"id":"1804.03114","kind":"arxiv","version":1}},"canonical_sha256":"c05ac435474d5c362ad3ee852fe089fb61883a77bafa75cac13bab545dda8ca2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c05ac435474d5c362ad3ee852fe089fb61883a77bafa75cac13bab545dda8ca2","first_computed_at":"2026-05-18T00:15:14.696053Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:14.696053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UTvO7uKl8IWX0mMD+q8WnXgR9atPg23f5cJDjcbxp/Q3CwiMj2vALagM3YX4jff3qHDnMRkXL95sqaq2fRPVBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:14.696758Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.03114","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b87b955434fb3ec5d7cf27a33cf8341b38104bc7cd1924575ba85419a783bea4","sha256:dfa6dc889e468010d479f2748630d5a0491208a5eb967b2e3e6c456bc34ad30d"],"state_sha256":"b9af4e4c4166013f1725fb7b12f6bfe81d02a46d1bd579d9e053163616fd67a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5j9c9nD17Q8K4TsCle38XWz9Ao2PtAVwDJBBnRhqSCtwHIubGL7oC3XME0zpLoZIprq8+cRdschi5OMJmWtqDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T20:57:58.454093Z","bundle_sha256":"3def0d24c5d8ebddd9a7e497cb60773eaed4a2e1740dff6b9d46e5a70ad9193b"}}