{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:A4NJWVP6KS7OYYCDO2YNSXU5AS","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":"541f5ed319df3f567b5d7490d5b965870263696e2e61516f3f8e44ab909ea9ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-13T21:00:03Z","title_canon_sha256":"be2f48ee139b1048021109984e88e465c192cd8a20d457c79141397be7dadeec"},"schema_version":"1.0","source":{"id":"1312.3946","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3946","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3946v1","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3946","created_at":"2026-05-18T01:45:50Z"},{"alias_kind":"pith_short_12","alias_value":"A4NJWVP6KS7O","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"A4NJWVP6KS7OYYCD","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"A4NJWVP6","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:5319873f209981dc672069f06e1ea2befb4f4d8bf0658fe244e2f3c2625dcbe5","target":"graph","created_at":"2026-05-18T01:45:50Z","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 periods for 33 members of Blanco 1 as measured from KELT-South light curves, the first reported rotation periods for this benchmark zero-age-main-sequence open cluster. The distribution of these stars spans from late-A or early-F dwarfs to mid-K with periods ranging from less than a day to ~8 days. The rotation period distribution has a morphology similar to the coeval Pleiades cluster, suggesting the universal nature of stellar rotation distributions. Employing two different gyrochronology methods, we find an age of 146+13-14 Myr for the cluster. Using the same techniques, we infer ","authors_text":"D. J. James, J. Pepper, K. G. Stassun, P. A. Cargile, R. B. Kuhn, R. Siverd","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-13T21:00:03Z","title":"Evaluating Gyrochronology on the Zero-Age-Main-Sequence: Rotation Periods in the Southern Open Cluster Blanco 1 from the KELT-South Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3946","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:cbf09c7a609871e930a7af590e48e02009f6f6119022baca7bd418b95699e272","target":"record","created_at":"2026-05-18T01:45:50Z","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":"541f5ed319df3f567b5d7490d5b965870263696e2e61516f3f8e44ab909ea9ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-13T21:00:03Z","title_canon_sha256":"be2f48ee139b1048021109984e88e465c192cd8a20d457c79141397be7dadeec"},"schema_version":"1.0","source":{"id":"1312.3946","kind":"arxiv","version":1}},"canonical_sha256":"071a9b55fe54beec604376b0d95e9d04aecdce4acb8a0002f55686d7be3db3c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"071a9b55fe54beec604376b0d95e9d04aecdce4acb8a0002f55686d7be3db3c7","first_computed_at":"2026-05-18T01:45:50.602704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:50.602704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XlanwYlwR94TGsbGaCxagpLZjMDvgraqMQFI231AJEPjckheloAz4ZAS5v4TameRL6BHu7VkgrL+ylIIGWMbAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:50.603130Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.3946","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cbf09c7a609871e930a7af590e48e02009f6f6119022baca7bd418b95699e272","sha256:5319873f209981dc672069f06e1ea2befb4f4d8bf0658fe244e2f3c2625dcbe5"],"state_sha256":"8e98a0fc2ab6ce552d00f9107ebc0a3a42291ed64541f5973c72c52d3e1538da"}