{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:CYNNH2EIYDKOMEHFEHUZMO5AC7","short_pith_number":"pith:CYNNH2EI","canonical_record":{"source":{"id":"1610.03852","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-12T20:00:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"63e63e4a98416a317ffa1333edf24c25c2ca014af4593d0418d27c38cb80c567","abstract_canon_sha256":"23fc28232b653b84fab38900b7ea9a6141d948acc302b05c360b4bed1696174f"},"schema_version":"1.0"},"canonical_sha256":"161ad3e888c0d4e610e521e9963ba017c9e55b4fa637f3184d6f14be77261155","source":{"kind":"arxiv","id":"1610.03852","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.03852","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"arxiv_version","alias_value":"1610.03852v1","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.03852","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"pith_short_12","alias_value":"CYNNH2EIYDKO","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CYNNH2EIYDKOMEHF","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CYNNH2EI","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:CYNNH2EIYDKOMEHFEHUZMO5AC7","target":"record","payload":{"canonical_record":{"source":{"id":"1610.03852","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-12T20:00:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"63e63e4a98416a317ffa1333edf24c25c2ca014af4593d0418d27c38cb80c567","abstract_canon_sha256":"23fc28232b653b84fab38900b7ea9a6141d948acc302b05c360b4bed1696174f"},"schema_version":"1.0"},"canonical_sha256":"161ad3e888c0d4e610e521e9963ba017c9e55b4fa637f3184d6f14be77261155","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:16.470011Z","signature_b64":"5jhl5GnMRkkBOoPyw7ON2dv8Fefr3UPHJwTJnQThpE8vARXCH1QGZ42AtrMf6ekwYnheDMmGYrl8ljgjRwscBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"161ad3e888c0d4e610e521e9963ba017c9e55b4fa637f3184d6f14be77261155","last_reissued_at":"2026-05-18T00:54:16.469579Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:16.469579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.03852","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":"2026-05-18T00:54:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pOm61FWxiDPZSnZI+0TBcZKgio8TOnLm8qOiq5WyXonq5lVoVr+SJhz1bqAokhzDzl//EQUM7T9OCs1SzKAcAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:51:11.062514Z"},"content_sha256":"fc4a45a1f045298c9ccc483173211e7b6f96d03de12caac70c05eefa9f0b04a5","schema_version":"1.0","event_id":"sha256:fc4a45a1f045298c9ccc483173211e7b6f96d03de12caac70c05eefa9f0b04a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:CYNNH2EIYDKOMEHFEHUZMO5AC7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the metallicity dependance of the [Y/Mg] - age relation for solar type stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"2) ((1) Lund Observatory, (2) Institute of Theoretical Physics, Astronomy, E. Stonkute (1, Lithuania), L.M. Howes (1), Lund University, P.J. McMillan (1), S. Feltzing (1), Sweden, Vilnius University","submitted_at":"2016-10-12T20:00:02Z","abstract_excerpt":"Several recent studies of Solar twins in the Solar neighbourhood have shown a tight correlation between various elemental abundances and age, in particular [Y/Mg]. If this relation is real and valid for other types of stars as well as elsewhere in the Galaxy it would provide a very powerful tool to derive ages of stars without the need to resort to determining their masses (evolutionary stage) very precisely. The method would also likely work if the stellar parameters have relatively large errors. The studies presented in the recent literature span a narrow range of [Fe/H]. By studying a large"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.03852","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":"2026-05-18T00:54:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AaYvoctdEaGGl710abmDO9FU2NeEEjasFksEUEFfgjb5MkeSsjCFfyt5fMJT3MCqNcIJg+IZpSWCxAXgfeqSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:51:11.062878Z"},"content_sha256":"5568be6e002768ff29eebaa24591e1fc63ef49d0f62e77efb44fa648554f616e","schema_version":"1.0","event_id":"sha256:5568be6e002768ff29eebaa24591e1fc63ef49d0f62e77efb44fa648554f616e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/bundle.json","state_url":"https://pith.science/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/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":"2026-05-28T04:51:11Z","links":{"resolver":"https://pith.science/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7","bundle":"https://pith.science/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/bundle.json","state":"https://pith.science/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CYNNH2EIYDKOMEHFEHUZMO5AC7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CYNNH2EIYDKOMEHFEHUZMO5AC7","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":"23fc28232b653b84fab38900b7ea9a6141d948acc302b05c360b4bed1696174f","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-12T20:00:02Z","title_canon_sha256":"63e63e4a98416a317ffa1333edf24c25c2ca014af4593d0418d27c38cb80c567"},"schema_version":"1.0","source":{"id":"1610.03852","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.03852","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"arxiv_version","alias_value":"1610.03852v1","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.03852","created_at":"2026-05-18T00:54:16Z"},{"alias_kind":"pith_short_12","alias_value":"CYNNH2EIYDKO","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CYNNH2EIYDKOMEHF","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CYNNH2EI","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:5568be6e002768ff29eebaa24591e1fc63ef49d0f62e77efb44fa648554f616e","target":"graph","created_at":"2026-05-18T00:54:16Z","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":"Several recent studies of Solar twins in the Solar neighbourhood have shown a tight correlation between various elemental abundances and age, in particular [Y/Mg]. If this relation is real and valid for other types of stars as well as elsewhere in the Galaxy it would provide a very powerful tool to derive ages of stars without the need to resort to determining their masses (evolutionary stage) very precisely. The method would also likely work if the stellar parameters have relatively large errors. The studies presented in the recent literature span a narrow range of [Fe/H]. By studying a large","authors_text":"2) ((1) Lund Observatory, (2) Institute of Theoretical Physics, Astronomy, E. Stonkute (1, Lithuania), L.M. Howes (1), Lund University, P.J. McMillan (1), S. Feltzing (1), Sweden, Vilnius University","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-12T20:00:02Z","title":"On the metallicity dependance of the [Y/Mg] - age relation for solar type stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.03852","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:fc4a45a1f045298c9ccc483173211e7b6f96d03de12caac70c05eefa9f0b04a5","target":"record","created_at":"2026-05-18T00:54:16Z","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":"23fc28232b653b84fab38900b7ea9a6141d948acc302b05c360b4bed1696174f","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-12T20:00:02Z","title_canon_sha256":"63e63e4a98416a317ffa1333edf24c25c2ca014af4593d0418d27c38cb80c567"},"schema_version":"1.0","source":{"id":"1610.03852","kind":"arxiv","version":1}},"canonical_sha256":"161ad3e888c0d4e610e521e9963ba017c9e55b4fa637f3184d6f14be77261155","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"161ad3e888c0d4e610e521e9963ba017c9e55b4fa637f3184d6f14be77261155","first_computed_at":"2026-05-18T00:54:16.469579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:16.469579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5jhl5GnMRkkBOoPyw7ON2dv8Fefr3UPHJwTJnQThpE8vARXCH1QGZ42AtrMf6ekwYnheDMmGYrl8ljgjRwscBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:16.470011Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.03852","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc4a45a1f045298c9ccc483173211e7b6f96d03de12caac70c05eefa9f0b04a5","sha256:5568be6e002768ff29eebaa24591e1fc63ef49d0f62e77efb44fa648554f616e"],"state_sha256":"f537ef883890262989d9d45bf59f674fa8cd991cdd06ed4595238387cc8dc6f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TNEaUv9UqEktIdJzdCJFRedBNW1NHQV/CNVOOUrB1JxwUfQEZuBOtbRZfNzpnDt1IcS4rMKGw2dKPfxvX/+OBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:51:11.064885Z","bundle_sha256":"2822f64cfac06d965b7a4e9774531f0989e9da59c37dfd5a83056177906846ae"}}