{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:HYXBYD7HKTFATN7VIKCCHAZ7S5","short_pith_number":"pith:HYXBYD7H","canonical_record":{"source":{"id":"1203.1618","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-07T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"b84673fa8ac84c156c1b7648e936a87addd23c5f1c3dc2124650bedad9bce20c","abstract_canon_sha256":"0c9fd3a33c2aa721f648da9f05cbb5b3072df56a906a0ddf4b1a5a0cb1669437"},"schema_version":"1.0"},"canonical_sha256":"3e2e1c0fe754ca09b7f5428423833f9754c485f77ba1f53fbc9b8f25ec80eeef","source":{"kind":"arxiv","id":"1203.1618","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1618","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1618v2","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1618","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"pith_short_12","alias_value":"HYXBYD7HKTFA","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HYXBYD7HKTFATN7V","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HYXBYD7H","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:HYXBYD7HKTFATN7VIKCCHAZ7S5","target":"record","payload":{"canonical_record":{"source":{"id":"1203.1618","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-07T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"b84673fa8ac84c156c1b7648e936a87addd23c5f1c3dc2124650bedad9bce20c","abstract_canon_sha256":"0c9fd3a33c2aa721f648da9f05cbb5b3072df56a906a0ddf4b1a5a0cb1669437"},"schema_version":"1.0"},"canonical_sha256":"3e2e1c0fe754ca09b7f5428423833f9754c485f77ba1f53fbc9b8f25ec80eeef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:03:44.876815Z","signature_b64":"Zsh7EuAkriEUipU3BvoN3oLdxt3NheDD6bzgOAb0ANrmACjY5Z0txvh6HIOxolkG4bBnaUYvFsc7dpBKWgYNCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e2e1c0fe754ca09b7f5428423833f9754c485f77ba1f53fbc9b8f25ec80eeef","last_reissued_at":"2026-05-18T03:03:44.876265Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:03:44.876265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.1618","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:03:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"02hK3iwDQlEtnFuSKZLZInzkovK/eEc7X+s9nCT5YLC/i9gYb/sSI6VTEbeUgumbl8jqTT8yK5byNExrBtbaBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:13:06.959988Z"},"content_sha256":"baa6d8cafd65e885d66ab514ecac8f87ebc42dec461b44e4803091be5fb39825","schema_version":"1.0","event_id":"sha256:baa6d8cafd65e885d66ab514ecac8f87ebc42dec461b44e4803091be5fb39825"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:HYXBYD7HKTFATN7VIKCCHAZ7S5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How Good a Clock is Rotation? The Stellar Rotation-Mass-Age Relationship for Old Field Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Courtney R. Epstein, Marc H. Pinsonneault","submitted_at":"2012-03-07T21:00:02Z","abstract_excerpt":"The rotation-mass-age relationship offers a promising avenue for measuring the ages of field stars, assuming the attendant uncertainties to this technique can be well characterized. We model stellar angular momentum evolution starting with a rotation distribution from open cluster M37. Our predicted rotation-mass-age relationship shows significant zero-point offsets compared to an alternative angular momentum loss law and published gyrochronology relations. Systematic errors at the 30 percent level are permitted by current data, highlighting the need for empirical guidance. We identify two fun"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1618","kind":"arxiv","version":2},"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":"2026-05-18T03:03:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FxWmAMiAVvoflpqLmHtTY+nmJm/qpGt1asooonwC9iT8VeWohY2PLTz1Apx0IOlYQBm7hEnGZYTC7D6tueTMDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:13:06.960625Z"},"content_sha256":"4867b361f304328deb878b60f501f557d75b438a22370a8d18081d18460b04b8","schema_version":"1.0","event_id":"sha256:4867b361f304328deb878b60f501f557d75b438a22370a8d18081d18460b04b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/bundle.json","state_url":"https://pith.science/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/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":"2026-08-11T16:13:06Z","links":{"resolver":"https://pith.science/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5","bundle":"https://pith.science/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/bundle.json","state":"https://pith.science/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HYXBYD7HKTFATN7VIKCCHAZ7S5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:HYXBYD7HKTFATN7VIKCCHAZ7S5","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":"0c9fd3a33c2aa721f648da9f05cbb5b3072df56a906a0ddf4b1a5a0cb1669437","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-07T21:00:02Z","title_canon_sha256":"b84673fa8ac84c156c1b7648e936a87addd23c5f1c3dc2124650bedad9bce20c"},"schema_version":"1.0","source":{"id":"1203.1618","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1618","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1618v2","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1618","created_at":"2026-05-18T03:03:44Z"},{"alias_kind":"pith_short_12","alias_value":"HYXBYD7HKTFA","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HYXBYD7HKTFATN7V","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HYXBYD7H","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:4867b361f304328deb878b60f501f557d75b438a22370a8d18081d18460b04b8","target":"graph","created_at":"2026-05-18T03:03:44Z","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":"The rotation-mass-age relationship offers a promising avenue for measuring the ages of field stars, assuming the attendant uncertainties to this technique can be well characterized. We model stellar angular momentum evolution starting with a rotation distribution from open cluster M37. Our predicted rotation-mass-age relationship shows significant zero-point offsets compared to an alternative angular momentum loss law and published gyrochronology relations. Systematic errors at the 30 percent level are permitted by current data, highlighting the need for empirical guidance. We identify two fun","authors_text":"Courtney R. Epstein, Marc H. Pinsonneault","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-07T21:00:02Z","title":"How Good a Clock is Rotation? The Stellar Rotation-Mass-Age Relationship for Old Field Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1618","kind":"arxiv","version":2},"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:baa6d8cafd65e885d66ab514ecac8f87ebc42dec461b44e4803091be5fb39825","target":"record","created_at":"2026-05-18T03:03:44Z","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":"0c9fd3a33c2aa721f648da9f05cbb5b3072df56a906a0ddf4b1a5a0cb1669437","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-07T21:00:02Z","title_canon_sha256":"b84673fa8ac84c156c1b7648e936a87addd23c5f1c3dc2124650bedad9bce20c"},"schema_version":"1.0","source":{"id":"1203.1618","kind":"arxiv","version":2}},"canonical_sha256":"3e2e1c0fe754ca09b7f5428423833f9754c485f77ba1f53fbc9b8f25ec80eeef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e2e1c0fe754ca09b7f5428423833f9754c485f77ba1f53fbc9b8f25ec80eeef","first_computed_at":"2026-05-18T03:03:44.876265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:44.876265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zsh7EuAkriEUipU3BvoN3oLdxt3NheDD6bzgOAb0ANrmACjY5Z0txvh6HIOxolkG4bBnaUYvFsc7dpBKWgYNCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:44.876815Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.1618","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:baa6d8cafd65e885d66ab514ecac8f87ebc42dec461b44e4803091be5fb39825","sha256:4867b361f304328deb878b60f501f557d75b438a22370a8d18081d18460b04b8"],"state_sha256":"4a13ecccc39bbc17879252d94c2754a367dde900944dab9a6113f8a875d04467"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HMlHa5DRsAgmS5CHmrIvjw1IPIfNulzUYx8izgA6wnoWnxHxD3gVtAmN1s7eae2i0AkcLwF9HUhKpQ/LqPbBAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T16:13:06.969982Z","bundle_sha256":"3a5760698aaabfe12bbaa4c7adeca812eb586bd59e168e83bf0cae2e5ccb3bd8"}}