{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:B52EWY23UMOXT4KVR7SF7E3E5O","short_pith_number":"pith:B52EWY23","canonical_record":{"source":{"id":"1302.6122","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-25T15:27:00Z","cross_cats_sorted":[],"title_canon_sha256":"f861e4b2f599a7e40f948f2d78cd06f2b9d388e13f10abacd1f4847f89989455","abstract_canon_sha256":"b5e7e9f2840b1b27ee3598eb949d68d4232cb2cc39ce04cddd8187b0cc51c519"},"schema_version":"1.0"},"canonical_sha256":"0f744b635ba31d79f1558fe45f9364eb8c307f7e8a691ff4e58c9c4123767f1c","source":{"kind":"arxiv","id":"1302.6122","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.6122","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"arxiv_version","alias_value":"1302.6122v1","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.6122","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"pith_short_12","alias_value":"B52EWY23UMOX","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"B52EWY23UMOXT4KV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"B52EWY23","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:B52EWY23UMOXT4KVR7SF7E3E5O","target":"record","payload":{"canonical_record":{"source":{"id":"1302.6122","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-25T15:27:00Z","cross_cats_sorted":[],"title_canon_sha256":"f861e4b2f599a7e40f948f2d78cd06f2b9d388e13f10abacd1f4847f89989455","abstract_canon_sha256":"b5e7e9f2840b1b27ee3598eb949d68d4232cb2cc39ce04cddd8187b0cc51c519"},"schema_version":"1.0"},"canonical_sha256":"0f744b635ba31d79f1558fe45f9364eb8c307f7e8a691ff4e58c9c4123767f1c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:28.852885Z","signature_b64":"hAfyaLFsZSNq2YsGHdwxK98BAVo9LhYWv1XjjYk0NoR70SMXXJTYV4nW/00qrOn61fw/qXSpI5lVAWxCsQbnCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f744b635ba31d79f1558fe45f9364eb8c307f7e8a691ff4e58c9c4123767f1c","last_reissued_at":"2026-05-18T01:51:28.852305Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:28.852305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.6122","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":"2026-05-18T01:51:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1m0i/hqL5NTuAHhiopiBhY0ta8EhnfxrQKr8w+tqUMlAYkN37YheRdc9vhXn6KRUKqbpdqwXa+8Z7eLlmPElAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:36:33.879822Z"},"content_sha256":"63588ad02b5f40166a688aed6545f90737f134e3874e0ebf8fbc63403f4dc587","schema_version":"1.0","event_id":"sha256:63588ad02b5f40166a688aed6545f90737f134e3874e0ebf8fbc63403f4dc587"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:B52EWY23UMOXT4KVR7SF7E3E5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ba & Eu Abundances in M15 giant stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"C.C.Worley, E.Carretta, J.Sobeck, V.Hill","submitted_at":"2013-02-25T15:27:00Z","abstract_excerpt":"To investigate the Ba and Eu abundances for a sample of 63 giant stars in the globular cluster M15. This is the largest sample of M15 giants stars for which Ba abundances have been determined and, due to the target selection of the original research programme, the Ba abundances are complete along the red giant branch. Stellar parameters were taken from the previous key study and a microturbulence-surface gravity relation was determined for precise measurement of the Ba line at 6496.898 Angstroms, which has a high sensitivity to microturbulence. Element abundances for Ba, La, Eu, Ca, Ni and Fe "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.6122","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":"2026-05-18T01:51:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y4ytrbY1eK5LYvjWae9vkoEpNOm66ob4VlFPeBnFpbBIS64SMZjL+JE9blzw0ALQyqILvYLVcf2FHR0mTkzPDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:36:33.880166Z"},"content_sha256":"4c09342caa9b8603e4f31c11737beb4865aac2761f48e1ca94b2c5c2044f8239","schema_version":"1.0","event_id":"sha256:4c09342caa9b8603e4f31c11737beb4865aac2761f48e1ca94b2c5c2044f8239"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B52EWY23UMOXT4KVR7SF7E3E5O/bundle.json","state_url":"https://pith.science/pith/B52EWY23UMOXT4KVR7SF7E3E5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B52EWY23UMOXT4KVR7SF7E3E5O/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":"2026-06-01T11:36:33Z","links":{"resolver":"https://pith.science/pith/B52EWY23UMOXT4KVR7SF7E3E5O","bundle":"https://pith.science/pith/B52EWY23UMOXT4KVR7SF7E3E5O/bundle.json","state":"https://pith.science/pith/B52EWY23UMOXT4KVR7SF7E3E5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B52EWY23UMOXT4KVR7SF7E3E5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:B52EWY23UMOXT4KVR7SF7E3E5O","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":"b5e7e9f2840b1b27ee3598eb949d68d4232cb2cc39ce04cddd8187b0cc51c519","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-25T15:27:00Z","title_canon_sha256":"f861e4b2f599a7e40f948f2d78cd06f2b9d388e13f10abacd1f4847f89989455"},"schema_version":"1.0","source":{"id":"1302.6122","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.6122","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"arxiv_version","alias_value":"1302.6122v1","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.6122","created_at":"2026-05-18T01:51:28Z"},{"alias_kind":"pith_short_12","alias_value":"B52EWY23UMOX","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"B52EWY23UMOXT4KV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"B52EWY23","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:4c09342caa9b8603e4f31c11737beb4865aac2761f48e1ca94b2c5c2044f8239","target":"graph","created_at":"2026-05-18T01:51:28Z","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":"To investigate the Ba and Eu abundances for a sample of 63 giant stars in the globular cluster M15. This is the largest sample of M15 giants stars for which Ba abundances have been determined and, due to the target selection of the original research programme, the Ba abundances are complete along the red giant branch. Stellar parameters were taken from the previous key study and a microturbulence-surface gravity relation was determined for precise measurement of the Ba line at 6496.898 Angstroms, which has a high sensitivity to microturbulence. Element abundances for Ba, La, Eu, Ca, Ni and Fe ","authors_text":"C.C.Worley, E.Carretta, J.Sobeck, V.Hill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-25T15:27:00Z","title":"Ba & Eu Abundances in M15 giant stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.6122","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":"sha256:63588ad02b5f40166a688aed6545f90737f134e3874e0ebf8fbc63403f4dc587","target":"record","created_at":"2026-05-18T01:51:28Z","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":"b5e7e9f2840b1b27ee3598eb949d68d4232cb2cc39ce04cddd8187b0cc51c519","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-25T15:27:00Z","title_canon_sha256":"f861e4b2f599a7e40f948f2d78cd06f2b9d388e13f10abacd1f4847f89989455"},"schema_version":"1.0","source":{"id":"1302.6122","kind":"arxiv","version":1}},"canonical_sha256":"0f744b635ba31d79f1558fe45f9364eb8c307f7e8a691ff4e58c9c4123767f1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f744b635ba31d79f1558fe45f9364eb8c307f7e8a691ff4e58c9c4123767f1c","first_computed_at":"2026-05-18T01:51:28.852305Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:28.852305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hAfyaLFsZSNq2YsGHdwxK98BAVo9LhYWv1XjjYk0NoR70SMXXJTYV4nW/00qrOn61fw/qXSpI5lVAWxCsQbnCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:28.852885Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.6122","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63588ad02b5f40166a688aed6545f90737f134e3874e0ebf8fbc63403f4dc587","sha256:4c09342caa9b8603e4f31c11737beb4865aac2761f48e1ca94b2c5c2044f8239"],"state_sha256":"7c7b7b340d090361bdef25be2b7ac73ffceb3c4acc1b3283a7bfb7bdef628920"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zwFcnm9hW5laf4YxZ4z+OcV8t3nKk8+woeai0dGkcRZTWnmuXqS0iZwvrmbcATuOHEhf5kbhw9OxNyVqe18iBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T11:36:33.882210Z","bundle_sha256":"4531f97d2f2fbb10dee2551d7dafd89f1f33fcfc8d4be2169f933dba31b06802"}}