{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:3RZPGOZWH5QTUMUN4SYOGP56TQ","short_pith_number":"pith:3RZPGOZW","canonical_record":{"source":{"id":"2102.03377","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:02:51Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"49539da84aa596dabb0b13a9da793a68216126de748a601e0c4074e5229cdbd5","abstract_canon_sha256":"54b6ee1d4689c55cb879e8577b628fff2164f4b729e3c8504ad09944dacfb513"},"schema_version":"1.0"},"canonical_sha256":"dc72f33b363f613a328de4b0e33fbe9c3c9b60943837e3e7c2cdfaa6d55673d0","source":{"kind":"arxiv","id":"2102.03377","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.03377","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"arxiv_version","alias_value":"2102.03377v1","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.03377","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_12","alias_value":"3RZPGOZWH5QT","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_16","alias_value":"3RZPGOZWH5QTUMUN","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_8","alias_value":"3RZPGOZW","created_at":"2026-07-05T02:13:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:3RZPGOZWH5QTUMUN4SYOGP56TQ","target":"record","payload":{"canonical_record":{"source":{"id":"2102.03377","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:02:51Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"49539da84aa596dabb0b13a9da793a68216126de748a601e0c4074e5229cdbd5","abstract_canon_sha256":"54b6ee1d4689c55cb879e8577b628fff2164f4b729e3c8504ad09944dacfb513"},"schema_version":"1.0"},"canonical_sha256":"dc72f33b363f613a328de4b0e33fbe9c3c9b60943837e3e7c2cdfaa6d55673d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:13:23.145607Z","signature_b64":"VtcfsgrwZ8MxdDyC9A/pl5SFmFBxdJFDdCNgWMppwwrT2HwUFu34DH23c9gAJwNJUu4nGAo/OxM/DPGoDNmnDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc72f33b363f613a328de4b0e33fbe9c3c9b60943837e3e7c2cdfaa6d55673d0","last_reissued_at":"2026-07-05T02:13:23.145197Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:13:23.145197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.03377","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":"2026-07-05T02:13:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/CmmHfl/dY5TwEX8w8W9r4kf6As74Qgo8u+tuYi/sONC14oND2m3JLA725pVoazMesjaVYJ2WMSpt+9R9zz0Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:10:01.056484Z"},"content_sha256":"36ccb3b51bbcb3b93ca9e9f98b4496e0ff946110292c701848714bc53db00797","schema_version":"1.0","event_id":"sha256:36ccb3b51bbcb3b93ca9e9f98b4496e0ff946110292c701848714bc53db00797"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:3RZPGOZWH5QTUMUN4SYOGP56TQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Intermediate-age Alpha-rich Galactic Population in K2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Beno\\^it Mosser, D. A. Garc\\'ia-Hern\\'andez, Dennis Stello, Jack T. Warfield, Jennifer A. Johnson, Joel C. Zinn, Marc H. Pinsonneault, Rachael L. Beaton, Rafael A. Garc\\'ia, Savita Mathur, Thomas Kallinger, Yvonne Elsworth","submitted_at":"2021-02-05T19:02:51Z","abstract_excerpt":"We explore the relationships between the chemistry, ages, and locations of stars in the Galaxy using asteroseismic data from the K2 mission and spectroscopic data from the Apache Point Galactic Evolution Experiment survey. Previous studies have used giant stars in the Kepler field to map the relationship between the chemical composition and the ages of stars at the solar circle. Consistent with prior work, we find that stars with high [Alpha/Fe] have distinct, older ages in comparison to stars with low [Alpha/Fe]. We provide age estimates for red giant branch (RGB) stars in the Kepler field, w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03377","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/2102.03377/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":"2026-07-05T02:13:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dKc0o2XweS4jbkJfCZt9o7rhTRPLmya0UkbEo8jozSXosPagXhJ/Pbclfq0wNtxgMzsW2NrM4MvUi3dYccwJBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:10:01.057076Z"},"content_sha256":"59d5925dd01649caf97498f932e902f49b2fd75d33dff478fe5e63da68e78c82","schema_version":"1.0","event_id":"sha256:59d5925dd01649caf97498f932e902f49b2fd75d33dff478fe5e63da68e78c82"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/bundle.json","state_url":"https://pith.science/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/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":"2026-08-12T05:10:01Z","links":{"resolver":"https://pith.science/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ","bundle":"https://pith.science/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/bundle.json","state":"https://pith.science/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3RZPGOZWH5QTUMUN4SYOGP56TQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3RZPGOZWH5QTUMUN4SYOGP56TQ","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":"54b6ee1d4689c55cb879e8577b628fff2164f4b729e3c8504ad09944dacfb513","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:02:51Z","title_canon_sha256":"49539da84aa596dabb0b13a9da793a68216126de748a601e0c4074e5229cdbd5"},"schema_version":"1.0","source":{"id":"2102.03377","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.03377","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"arxiv_version","alias_value":"2102.03377v1","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.03377","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_12","alias_value":"3RZPGOZWH5QT","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_16","alias_value":"3RZPGOZWH5QTUMUN","created_at":"2026-07-05T02:13:23Z"},{"alias_kind":"pith_short_8","alias_value":"3RZPGOZW","created_at":"2026-07-05T02:13:23Z"}],"graph_snapshots":[{"event_id":"sha256:59d5925dd01649caf97498f932e902f49b2fd75d33dff478fe5e63da68e78c82","target":"graph","created_at":"2026-07-05T02:13:23Z","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/2102.03377/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We explore the relationships between the chemistry, ages, and locations of stars in the Galaxy using asteroseismic data from the K2 mission and spectroscopic data from the Apache Point Galactic Evolution Experiment survey. Previous studies have used giant stars in the Kepler field to map the relationship between the chemical composition and the ages of stars at the solar circle. Consistent with prior work, we find that stars with high [Alpha/Fe] have distinct, older ages in comparison to stars with low [Alpha/Fe]. We provide age estimates for red giant branch (RGB) stars in the Kepler field, w","authors_text":"Beno\\^it Mosser, D. A. Garc\\'ia-Hern\\'andez, Dennis Stello, Jack T. Warfield, Jennifer A. Johnson, Joel C. Zinn, Marc H. Pinsonneault, Rachael L. Beaton, Rafael A. Garc\\'ia, Savita Mathur, Thomas Kallinger, Yvonne Elsworth","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:02:51Z","title":"An Intermediate-age Alpha-rich Galactic Population in K2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03377","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":"sha256:36ccb3b51bbcb3b93ca9e9f98b4496e0ff946110292c701848714bc53db00797","target":"record","created_at":"2026-07-05T02:13:23Z","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":"54b6ee1d4689c55cb879e8577b628fff2164f4b729e3c8504ad09944dacfb513","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:02:51Z","title_canon_sha256":"49539da84aa596dabb0b13a9da793a68216126de748a601e0c4074e5229cdbd5"},"schema_version":"1.0","source":{"id":"2102.03377","kind":"arxiv","version":1}},"canonical_sha256":"dc72f33b363f613a328de4b0e33fbe9c3c9b60943837e3e7c2cdfaa6d55673d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc72f33b363f613a328de4b0e33fbe9c3c9b60943837e3e7c2cdfaa6d55673d0","first_computed_at":"2026-07-05T02:13:23.145197Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:13:23.145197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VtcfsgrwZ8MxdDyC9A/pl5SFmFBxdJFDdCNgWMppwwrT2HwUFu34DH23c9gAJwNJUu4nGAo/OxM/DPGoDNmnDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:13:23.145607Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.03377","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36ccb3b51bbcb3b93ca9e9f98b4496e0ff946110292c701848714bc53db00797","sha256:59d5925dd01649caf97498f932e902f49b2fd75d33dff478fe5e63da68e78c82"],"state_sha256":"159da03c4ce1050101d72ce443a7c653206506d2fa936b74683fe0a938ba3ce0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hdrDYK4lTiVfNBe05CSthKJX6SpYyPXRcWdztQL1PbKCWUlP5O/PdMoWZsJBKgg5yRzqkCCruP6nNOLULCKTCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T05:10:01.060727Z","bundle_sha256":"8d2917b9fd5e5e772789c33258111cedf050fbbe8109e2cb53a4449f8a334dbd"}}