{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:DWT7DIXY4C23T5GUCO2ZFFNTDX","short_pith_number":"pith:DWT7DIXY","canonical_record":{"source":{"id":"1411.1185","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-11-05T08:28:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"3baff5faaa59fd071d7fd057576a146721e76bf421815844060cb8587529d5d9","abstract_canon_sha256":"3a54a32992b3e4d3c1cad8bc0095a43c658522b7ed377d2662e9f33e6310874d"},"schema_version":"1.0"},"canonical_sha256":"1da7f1a2f8e0b5b9f4d413b59295b31dc9fada20748375ebdd2d2484b3f1fc6e","source":{"kind":"arxiv","id":"1411.1185","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.1185","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"arxiv_version","alias_value":"1411.1185v1","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1185","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"pith_short_12","alias_value":"DWT7DIXY4C23","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DWT7DIXY4C23T5GU","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DWT7DIXY","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:DWT7DIXY4C23T5GUCO2ZFFNTDX","target":"record","payload":{"canonical_record":{"source":{"id":"1411.1185","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-11-05T08:28:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"3baff5faaa59fd071d7fd057576a146721e76bf421815844060cb8587529d5d9","abstract_canon_sha256":"3a54a32992b3e4d3c1cad8bc0095a43c658522b7ed377d2662e9f33e6310874d"},"schema_version":"1.0"},"canonical_sha256":"1da7f1a2f8e0b5b9f4d413b59295b31dc9fada20748375ebdd2d2484b3f1fc6e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:35.002130Z","signature_b64":"UlnbE1F+4geJLe9Sz/kudLfe5cn4OUpADs68quJTAI4WNcD4WWXXVLm7FA44Uiy020I3MK1PSKE0vJS/CUxJBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1da7f1a2f8e0b5b9f4d413b59295b31dc9fada20748375ebdd2d2484b3f1fc6e","last_reissued_at":"2026-05-18T01:41:35.001528Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:35.001528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.1185","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":"2026-05-18T01:41:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ru93mp63dpHMyUGEDDgkdJ+qdZkMiJxS1MFKnNloo/UhvwykQz2r+OYRlP18xYCxwNkKLWB+h3Q3EzahujT2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:36:05.200520Z"},"content_sha256":"02ab9d3200cb54863bcb19cc5c2aa706263cd07376f3ce8900e3900d85f094f9","schema_version":"1.0","event_id":"sha256:02ab9d3200cb54863bcb19cc5c2aa706263cd07376f3ce8900e3900d85f094f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:DWT7DIXY4C23T5GUCO2ZFFNTDX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"O, Na, Ba and Eu abundance patterns in open clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"B. T. MacLean, G. M. De Silva, J. Lattanzio","submitted_at":"2014-11-05T08:28:12Z","abstract_excerpt":"Open clusters are historically regarded as single-aged stellar populations representative of star formation within the Galactic disk. Recent literature has questioned this view, based on discrepant Na abundances relative to the field, and concerns about the longevity of bound clusters contributing to a selection bias: perhaps long-lived open clusters are chemically different to the star formation events that contributed to the Galactic disk. We explore a large sample of high resolution Na, O, Ba & Eu abundances from the literature, homogenized as much as reasonable including accounting for NLT"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1185","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":"2026-05-18T01:41:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s44yvJ+g1Oeshoq5Z5aN7rlQLw8pqUEIH1A27gsKM6xBS4MNoAHWCLdd743MRDge5CpMkpR1piJbELuVuyIxAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:36:05.201175Z"},"content_sha256":"ba1ad8b13b2364c0f30883b066e3c9965a6acdf2a7e25456b2292961979aa9c4","schema_version":"1.0","event_id":"sha256:ba1ad8b13b2364c0f30883b066e3c9965a6acdf2a7e25456b2292961979aa9c4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/bundle.json","state_url":"https://pith.science/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/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":"2026-05-27T17:36:05Z","links":{"resolver":"https://pith.science/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX","bundle":"https://pith.science/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/bundle.json","state":"https://pith.science/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DWT7DIXY4C23T5GUCO2ZFFNTDX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DWT7DIXY4C23T5GUCO2ZFFNTDX","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":"3a54a32992b3e4d3c1cad8bc0095a43c658522b7ed377d2662e9f33e6310874d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-11-05T08:28:12Z","title_canon_sha256":"3baff5faaa59fd071d7fd057576a146721e76bf421815844060cb8587529d5d9"},"schema_version":"1.0","source":{"id":"1411.1185","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.1185","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"arxiv_version","alias_value":"1411.1185v1","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1185","created_at":"2026-05-18T01:41:35Z"},{"alias_kind":"pith_short_12","alias_value":"DWT7DIXY4C23","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DWT7DIXY4C23T5GU","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DWT7DIXY","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:ba1ad8b13b2364c0f30883b066e3c9965a6acdf2a7e25456b2292961979aa9c4","target":"graph","created_at":"2026-05-18T01:41:35Z","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":"Open clusters are historically regarded as single-aged stellar populations representative of star formation within the Galactic disk. Recent literature has questioned this view, based on discrepant Na abundances relative to the field, and concerns about the longevity of bound clusters contributing to a selection bias: perhaps long-lived open clusters are chemically different to the star formation events that contributed to the Galactic disk. We explore a large sample of high resolution Na, O, Ba & Eu abundances from the literature, homogenized as much as reasonable including accounting for NLT","authors_text":"B. T. MacLean, G. M. De Silva, J. Lattanzio","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-11-05T08:28:12Z","title":"O, Na, Ba and Eu abundance patterns in open clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1185","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":"sha256:02ab9d3200cb54863bcb19cc5c2aa706263cd07376f3ce8900e3900d85f094f9","target":"record","created_at":"2026-05-18T01:41:35Z","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":"3a54a32992b3e4d3c1cad8bc0095a43c658522b7ed377d2662e9f33e6310874d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-11-05T08:28:12Z","title_canon_sha256":"3baff5faaa59fd071d7fd057576a146721e76bf421815844060cb8587529d5d9"},"schema_version":"1.0","source":{"id":"1411.1185","kind":"arxiv","version":1}},"canonical_sha256":"1da7f1a2f8e0b5b9f4d413b59295b31dc9fada20748375ebdd2d2484b3f1fc6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1da7f1a2f8e0b5b9f4d413b59295b31dc9fada20748375ebdd2d2484b3f1fc6e","first_computed_at":"2026-05-18T01:41:35.001528Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:35.001528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UlnbE1F+4geJLe9Sz/kudLfe5cn4OUpADs68quJTAI4WNcD4WWXXVLm7FA44Uiy020I3MK1PSKE0vJS/CUxJBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:35.002130Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.1185","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02ab9d3200cb54863bcb19cc5c2aa706263cd07376f3ce8900e3900d85f094f9","sha256:ba1ad8b13b2364c0f30883b066e3c9965a6acdf2a7e25456b2292961979aa9c4"],"state_sha256":"73007382103d9c3aad6acf733f316ab382d320e351e7067c37a9a3623e746246"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s1kb1uBqo75sPNI13dKxSa3FwiUMxHwiEtVlwWMqR6Gn5Ul4sLSqljgqawZXepwr+qxxr5+rHW3Pc03H0ZwNAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:36:05.204581Z","bundle_sha256":"429accad7bddab8caff7d9be381bf9d197338ef0887137e10b00f0e773816b20"}}