{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:Q33NVSIIPT5JTDYUXWF7CCQSVB","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":"9cc63156a5b5c2ab632dff6e840621c4f4a011d1402dc4579b141bbb9e0546fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-09T20:00:24Z","title_canon_sha256":"d4f0341773ee1006d3a755ffaf10e7b9f9be92d8a2bf24c1a3c410d7ceb1d76f"},"schema_version":"1.0","source":{"id":"1310.2613","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2613","created_at":"2026-05-18T01:47:07Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2613v1","created_at":"2026-05-18T01:47:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2613","created_at":"2026-05-18T01:47:07Z"},{"alias_kind":"pith_short_12","alias_value":"Q33NVSIIPT5J","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"Q33NVSIIPT5JTDYU","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"Q33NVSII","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:2c625064229f50ba62be6ee64d88206d8b4fcb493bb0dafd6f3703a7c4fc7520","target":"graph","created_at":"2026-05-18T01:47:07Z","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":"Optical spectroscopy is used to confirm membership for 8 low-mass candidates in the young Beta Pic moving group (BPMG) via their radial velocities, chromospheric activity and kinematic parallaxes. We searched for the presence of the Li I 6708A resonance feature and combined the results with literature measurements of other BPMG members to find the age-dependent lithium depletion boundary (LDB) -- the luminosity at which Li remains unburned in a coeval group. The LDB age of the BPMG is 21 +/- 4 Myr and insensitive to the choice of low-mass evolutionary models. This age is more precise, likely t","authors_text":"A.S Binks, R.D. Jeffries (Keele University, UK)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-09T20:00:24Z","title":"A lithium depletion boundary age of 21 Myr for the Beta Pictoris moving group"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2613","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":"sha256:58eed3c2a6a87aab32548fc95d99c12d885b766e46cc26561cefedaaca4313c7","target":"record","created_at":"2026-05-18T01:47:07Z","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":"9cc63156a5b5c2ab632dff6e840621c4f4a011d1402dc4579b141bbb9e0546fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-09T20:00:24Z","title_canon_sha256":"d4f0341773ee1006d3a755ffaf10e7b9f9be92d8a2bf24c1a3c410d7ceb1d76f"},"schema_version":"1.0","source":{"id":"1310.2613","kind":"arxiv","version":1}},"canonical_sha256":"86f6dac9087cfa998f14bd8bf10a12a848e774c9bda775db81d28995808423e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86f6dac9087cfa998f14bd8bf10a12a848e774c9bda775db81d28995808423e1","first_computed_at":"2026-05-18T01:47:07.338895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:07.338895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IDf4NnMNYxEXBASS5qDiJ+r8jkF4NDlPJiGFxqf7wR23SNMMNY9XyqG7HxgSBlyamW7kG8xnMYfi6N3JrN/XAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:07.339452Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.2613","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58eed3c2a6a87aab32548fc95d99c12d885b766e46cc26561cefedaaca4313c7","sha256:2c625064229f50ba62be6ee64d88206d8b4fcb493bb0dafd6f3703a7c4fc7520"],"state_sha256":"ff315721eaf05c8a22479f2ba9a47ae1dc5e7e007ccc13f7c533f7d64abbb439"}