{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:TF4F5UI6YBYXA7EQJRPH5NLEHU","short_pith_number":"pith:TF4F5UI6","canonical_record":{"source":{"id":"astro-ph/0412213","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-09T14:57:52Z","cross_cats_sorted":[],"title_canon_sha256":"dd263d35fae013ba3cfd5f07a544cddfed44360a1798e89035de799ad71c549c","abstract_canon_sha256":"a0b484c9b1c736eab07a9fe06314b1baf37deabc8d51ec8d1a2535390776b510"},"schema_version":"1.0"},"canonical_sha256":"99785ed11ec071707c904c5e7eb5643d11faa79881368f9aa2b20cf00282390b","source":{"kind":"arxiv","id":"astro-ph/0412213","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0412213","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0412213v1","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0412213","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"pith_short_12","alias_value":"TF4F5UI6YBYX","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"TF4F5UI6YBYXA7EQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"TF4F5UI6","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:TF4F5UI6YBYXA7EQJRPH5NLEHU","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0412213","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-09T14:57:52Z","cross_cats_sorted":[],"title_canon_sha256":"dd263d35fae013ba3cfd5f07a544cddfed44360a1798e89035de799ad71c549c","abstract_canon_sha256":"a0b484c9b1c736eab07a9fe06314b1baf37deabc8d51ec8d1a2535390776b510"},"schema_version":"1.0"},"canonical_sha256":"99785ed11ec071707c904c5e7eb5643d11faa79881368f9aa2b20cf00282390b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:16.344096Z","signature_b64":"bLTRJ8odd1S9o1BPmJgY38B3SR4ygZUGsk/+KgvxfOJRMzyt5pCzRY64l5pT9o1HvvS0+7Ho4lyw8f5hYN2vDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99785ed11ec071707c904c5e7eb5643d11faa79881368f9aa2b20cf00282390b","last_reissued_at":"2026-05-18T01:27:16.343572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:16.343572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0412213","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":"2026-05-18T01:27:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PCNsUaMWemejOh62eh48w+6Z8QSGhmMvY53rzH7HDanJmeeoNY0lnjpajhcXtXvbYUz84cZxCW65Ii2V6VT7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T03:10:42.572763Z"},"content_sha256":"0c1ea0544e932c02015d06919293cab2b4908fd5e22d46d31abeecbfe21510d7","schema_version":"1.0","event_id":"sha256:0c1ea0544e932c02015d06919293cab2b4908fd5e22d46d31abeecbfe21510d7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:TF4F5UI6YBYXA7EQJRPH5NLEHU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Age spreads in clusters and associations: the lithium test","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Francesco Palla, Sofia Randich","submitted_at":"2004-12-09T14:57:52Z","abstract_excerpt":"We report the evidence that several low-mass stars (<~0.4 Msun) of the Orion and Upper Scorpius clusters have lithium abundances well below the interstellar value. Due to time-dependent depletion, our result implies stellar ages greater than ~5 Myr, suggesting that star formation has been proceeding for a long time in these systems."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0412213","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":"2026-05-18T01:27:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T8EW9ddUDDoj7HMQPeQ6SYubUUfASxePVJEXBxLn5QoJv3fsh/pdq09bwJYYBawYAIjpSlhNhF+Prf2nec9TCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T03:10:42.573417Z"},"content_sha256":"ca6d8dd06598282a78f286f9ceef0abece33c0be55297e87e2e075b692b62df9","schema_version":"1.0","event_id":"sha256:ca6d8dd06598282a78f286f9ceef0abece33c0be55297e87e2e075b692b62df9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/bundle.json","state_url":"https://pith.science/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/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":"2026-06-10T03:10:42Z","links":{"resolver":"https://pith.science/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU","bundle":"https://pith.science/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/bundle.json","state":"https://pith.science/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TF4F5UI6YBYXA7EQJRPH5NLEHU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:TF4F5UI6YBYXA7EQJRPH5NLEHU","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":"a0b484c9b1c736eab07a9fe06314b1baf37deabc8d51ec8d1a2535390776b510","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-09T14:57:52Z","title_canon_sha256":"dd263d35fae013ba3cfd5f07a544cddfed44360a1798e89035de799ad71c549c"},"schema_version":"1.0","source":{"id":"astro-ph/0412213","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0412213","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0412213v1","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0412213","created_at":"2026-05-18T01:27:16Z"},{"alias_kind":"pith_short_12","alias_value":"TF4F5UI6YBYX","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"TF4F5UI6YBYXA7EQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"TF4F5UI6","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:ca6d8dd06598282a78f286f9ceef0abece33c0be55297e87e2e075b692b62df9","target":"graph","created_at":"2026-05-18T01:27:16Z","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":"We report the evidence that several low-mass stars (<~0.4 Msun) of the Orion and Upper Scorpius clusters have lithium abundances well below the interstellar value. Due to time-dependent depletion, our result implies stellar ages greater than ~5 Myr, suggesting that star formation has been proceeding for a long time in these systems.","authors_text":"Francesco Palla, Sofia Randich","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-12-09T14:57:52Z","title":"Age spreads in clusters and associations: the lithium test"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0412213","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":"sha256:0c1ea0544e932c02015d06919293cab2b4908fd5e22d46d31abeecbfe21510d7","target":"record","created_at":"2026-05-18T01:27:16Z","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":"a0b484c9b1c736eab07a9fe06314b1baf37deabc8d51ec8d1a2535390776b510","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-09T14:57:52Z","title_canon_sha256":"dd263d35fae013ba3cfd5f07a544cddfed44360a1798e89035de799ad71c549c"},"schema_version":"1.0","source":{"id":"astro-ph/0412213","kind":"arxiv","version":1}},"canonical_sha256":"99785ed11ec071707c904c5e7eb5643d11faa79881368f9aa2b20cf00282390b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99785ed11ec071707c904c5e7eb5643d11faa79881368f9aa2b20cf00282390b","first_computed_at":"2026-05-18T01:27:16.343572Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:16.343572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bLTRJ8odd1S9o1BPmJgY38B3SR4ygZUGsk/+KgvxfOJRMzyt5pCzRY64l5pT9o1HvvS0+7Ho4lyw8f5hYN2vDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:16.344096Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0412213","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c1ea0544e932c02015d06919293cab2b4908fd5e22d46d31abeecbfe21510d7","sha256:ca6d8dd06598282a78f286f9ceef0abece33c0be55297e87e2e075b692b62df9"],"state_sha256":"575d3efab287fbbd48995138f26a659b6b2894b0353151f4ac654aa0edb5d3ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KxGMJljjMgkyFin1lvkidnch63WXejpPNin6BVJW8wP9Zjhv96tkEX2yt1pgScGqxkv+jVwAcE4ueQTVdo+yCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T03:10:42.577153Z","bundle_sha256":"7167ff65f6b6bf6a62e38e19b4aa406ea4ce0781fd715d2159549565b1663c0f"}}