{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:524M6GMVDYBX7Q7CSJZ7CO7ZSO","short_pith_number":"pith:524M6GMV","canonical_record":{"source":{"id":"2410.06246","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-10-08T18:00:00Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"937ea55c06f6c24c6662ef609c67e128895542ab457fd19ce1c31fde9f156be8","abstract_canon_sha256":"230c2b8d2b1b662f7341aa405776bd0a1f039bd535902d3cdb35dbcc228c6d3a"},"schema_version":"1.0"},"canonical_sha256":"eeb8cf19951e037fc3e29273f13bf9938f9c05205493b1f91121f9ccc547a876","source":{"kind":"arxiv","id":"2410.06246","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.06246","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"arxiv_version","alias_value":"2410.06246v1","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.06246","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_12","alias_value":"524M6GMVDYBX","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_16","alias_value":"524M6GMVDYBX7Q7C","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_8","alias_value":"524M6GMV","created_at":"2026-07-05T09:17:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:524M6GMVDYBX7Q7CSJZ7CO7ZSO","target":"record","payload":{"canonical_record":{"source":{"id":"2410.06246","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-10-08T18:00:00Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"937ea55c06f6c24c6662ef609c67e128895542ab457fd19ce1c31fde9f156be8","abstract_canon_sha256":"230c2b8d2b1b662f7341aa405776bd0a1f039bd535902d3cdb35dbcc228c6d3a"},"schema_version":"1.0"},"canonical_sha256":"eeb8cf19951e037fc3e29273f13bf9938f9c05205493b1f91121f9ccc547a876","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:17:58.552155Z","signature_b64":"KGj55pCW0TH7JDcQdh5wo0vNKQmpfbONHlIciP7FYACDk4TNnwJylDySAUhh2Q2fVM0n+1xxkWTMMB9Vr26PDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eeb8cf19951e037fc3e29273f13bf9938f9c05205493b1f91121f9ccc547a876","last_reissued_at":"2026-07-05T09:17:58.551676Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:17:58.551676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2410.06246","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":"2026-07-05T09:17:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2/XYskvV7YMigrssym66/l5a81k+auuUU0GQQ/CIvHh17JBFS9NCnl4v4iG6akTVjWBNHGIEOYJjp3f0BrqFDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T07:18:14.169363Z"},"content_sha256":"a951997f5a0cacdc0fd9ad5c7f410ab3a8eec81e4b17bdaf457988ec981f5b86","schema_version":"1.0","event_id":"sha256:a951997f5a0cacdc0fd9ad5c7f410ab3a8eec81e4b17bdaf457988ec981f5b86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:524M6GMVDYBX7Q7CSJZ7CO7ZSO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ages of Stars and Planets in the Kepler Field Younger Than Four Billion Years","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andrew W. Howard, Elsa K. Palumbo, Howard Isaacson, Kento Masuda, Luke G. Bouma, Lynne A. Hillenbrand","submitted_at":"2024-10-08T18:00:00Z","abstract_excerpt":"Recent analyses of FGK stars in open clusters have helped clarify the precision with which a star's rotation rate and lithium content can be used as empirical indicators for its age. Here we apply this knowledge to stars observed by Kepler. Rotation periods are drawn from previous work; lithium is measured from new and archival Keck/HIRES spectra. We report rotation-based ages for 23,813 stars (harboring 795 known planets) for which our method is applicable. We find that our rotational ages recover the ages of stars in open clusters spanning 0.04-2.5 Gyr; they also agree with over 90% of the i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.06246","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2410.06246/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T09:17:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IDOFouRox2lki+NSchak/gZKPak3XTyL+b6U9avLIHVkPGg0C0uSiuPtx6itGjwqcQWRYdxBnVfiM75Ua/dMBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T07:18:14.169908Z"},"content_sha256":"f8ff85636cce907bea2b0a3ba1474eaf372b4efa195af993719a84c73dab37a6","schema_version":"1.0","event_id":"sha256:f8ff85636cce907bea2b0a3ba1474eaf372b4efa195af993719a84c73dab37a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/bundle.json","state_url":"https://pith.science/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/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":"2026-08-19T07:18:14Z","links":{"resolver":"https://pith.science/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO","bundle":"https://pith.science/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/bundle.json","state":"https://pith.science/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/524M6GMVDYBX7Q7CSJZ7CO7ZSO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:524M6GMVDYBX7Q7CSJZ7CO7ZSO","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":"230c2b8d2b1b662f7341aa405776bd0a1f039bd535902d3cdb35dbcc228c6d3a","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-10-08T18:00:00Z","title_canon_sha256":"937ea55c06f6c24c6662ef609c67e128895542ab457fd19ce1c31fde9f156be8"},"schema_version":"1.0","source":{"id":"2410.06246","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.06246","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"arxiv_version","alias_value":"2410.06246v1","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.06246","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_12","alias_value":"524M6GMVDYBX","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_16","alias_value":"524M6GMVDYBX7Q7C","created_at":"2026-07-05T09:17:58Z"},{"alias_kind":"pith_short_8","alias_value":"524M6GMV","created_at":"2026-07-05T09:17:58Z"}],"graph_snapshots":[{"event_id":"sha256:f8ff85636cce907bea2b0a3ba1474eaf372b4efa195af993719a84c73dab37a6","target":"graph","created_at":"2026-07-05T09:17:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2410.06246/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent analyses of FGK stars in open clusters have helped clarify the precision with which a star's rotation rate and lithium content can be used as empirical indicators for its age. Here we apply this knowledge to stars observed by Kepler. Rotation periods are drawn from previous work; lithium is measured from new and archival Keck/HIRES spectra. We report rotation-based ages for 23,813 stars (harboring 795 known planets) for which our method is applicable. We find that our rotational ages recover the ages of stars in open clusters spanning 0.04-2.5 Gyr; they also agree with over 90% of the i","authors_text":"Andrew W. Howard, Elsa K. Palumbo, Howard Isaacson, Kento Masuda, Luke G. Bouma, Lynne A. Hillenbrand","cross_cats":["astro-ph.EP","astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-10-08T18:00:00Z","title":"Ages of Stars and Planets in the Kepler Field Younger Than Four Billion Years"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.06246","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:a951997f5a0cacdc0fd9ad5c7f410ab3a8eec81e4b17bdaf457988ec981f5b86","target":"record","created_at":"2026-07-05T09:17:58Z","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":"230c2b8d2b1b662f7341aa405776bd0a1f039bd535902d3cdb35dbcc228c6d3a","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-10-08T18:00:00Z","title_canon_sha256":"937ea55c06f6c24c6662ef609c67e128895542ab457fd19ce1c31fde9f156be8"},"schema_version":"1.0","source":{"id":"2410.06246","kind":"arxiv","version":1}},"canonical_sha256":"eeb8cf19951e037fc3e29273f13bf9938f9c05205493b1f91121f9ccc547a876","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eeb8cf19951e037fc3e29273f13bf9938f9c05205493b1f91121f9ccc547a876","first_computed_at":"2026-07-05T09:17:58.551676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:17:58.551676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KGj55pCW0TH7JDcQdh5wo0vNKQmpfbONHlIciP7FYACDk4TNnwJylDySAUhh2Q2fVM0n+1xxkWTMMB9Vr26PDw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:17:58.552155Z","signed_message":"canonical_sha256_bytes"},"source_id":"2410.06246","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a951997f5a0cacdc0fd9ad5c7f410ab3a8eec81e4b17bdaf457988ec981f5b86","sha256:f8ff85636cce907bea2b0a3ba1474eaf372b4efa195af993719a84c73dab37a6"],"state_sha256":"714466868d91e6cc4c29a147231843c61c3aef85e5cede53a983cb992dbea5d6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z8d9QW9yJlQwWQAWVnjMMW9beLe83JAsx6EkwDSw8voUX5dcyLVD6cCsixabe7dIcETTs+bKfwNhlVfS4ndoBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T07:18:14.174845Z","bundle_sha256":"5caafd85c2c5d8b43403df433ae78cb916a07f14b3d33f0347d09d0f50348463"}}