{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:BB2PKZTRHJPXSKR2SFWRLKLQY7","short_pith_number":"pith:BB2PKZTR","canonical_record":{"source":{"id":"2203.10007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-18T15:15:45Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"45f38e4087f65e2de48b2cfc73e6e9877e082928d00dd4d2374f1cd0351a1a7b","abstract_canon_sha256":"9f6e7097c265c8cc95d3459adc2c8108c045d2e5a97d937ef3e7dcd48f051eea"},"schema_version":"1.0"},"canonical_sha256":"0874f566713a5f792a3a916d15a970c7f6e9c1d5e72caff3a5c0c063b12ecc11","source":{"kind":"arxiv","id":"2203.10007","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.10007","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"arxiv_version","alias_value":"2203.10007v1","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.10007","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_12","alias_value":"BB2PKZTRHJPX","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_16","alias_value":"BB2PKZTRHJPXSKR2","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_8","alias_value":"BB2PKZTR","created_at":"2026-07-05T04:06:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:BB2PKZTRHJPXSKR2SFWRLKLQY7","target":"record","payload":{"canonical_record":{"source":{"id":"2203.10007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-18T15:15:45Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"45f38e4087f65e2de48b2cfc73e6e9877e082928d00dd4d2374f1cd0351a1a7b","abstract_canon_sha256":"9f6e7097c265c8cc95d3459adc2c8108c045d2e5a97d937ef3e7dcd48f051eea"},"schema_version":"1.0"},"canonical_sha256":"0874f566713a5f792a3a916d15a970c7f6e9c1d5e72caff3a5c0c063b12ecc11","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:06:26.745788Z","signature_b64":"OML8lcYrRKGEQ3wahlxewXTpQ8CaLOOnP9oriefDOp9RtqOkp3YxR7mp61MayYyiVcCWLuDepcH4U6kbCy+TDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0874f566713a5f792a3a916d15a970c7f6e9c1d5e72caff3a5c0c063b12ecc11","last_reissued_at":"2026-07-05T04:06:26.745217Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:06:26.745217Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.10007","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":"2026-07-05T04:06:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cKXlTwyBhoba+3TcYUhsnsNbr/rh3p9YDhvNYlM/yidUwVP0rbuv3clNzaVcXyBcFPJm/g6h1bn5J+2NXTuxCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T23:46:03.558245Z"},"content_sha256":"08855bc5c9780fb8c1a8d7ea153cc819423004afdf0c58006fad99bdb98de48c","schema_version":"1.0","event_id":"sha256:08855bc5c9780fb8c1a8d7ea153cc819423004afdf0c58006fad99bdb98de48c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:BB2PKZTRHJPXSKR2SFWRLKLQY7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"OB Associations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Eleonora Zari (Max-Planck Institut fur Astronomie), Marina Kounkel (Vanderbilt University), Nicholas J. Wright (Keele University), Robin D. Jeffries (Keele University), Simon Goodwin (University of Sheffield)","submitted_at":"2022-03-18T15:15:45Z","abstract_excerpt":"OB associations are low-density groups of young stars that are dispersing from their birth environment into the Galactic field. They are important for understanding the star formation process, early stellar evolution, the properties and distribution of young stars and the processes by which young stellar groups disperse. Recent observations, particularly from Gaia, have shown that associations are highly complex, with a high degree of spatial, kinematic and temporal substructure. The kinematics of associations have shown them to be globally unbound and expanding, with the majority of recent st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.10007","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/2203.10007/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":"2026-07-05T04:06:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hL9jTU5P0CqkCf4JwO/o+BsTkxvwuL8FYvpmzOGBPh35iP7JUERuW5wc8LYuDaTcKqqY5TugTwyihgOH93/rAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T23:46:03.558756Z"},"content_sha256":"9073f84b914f04023d2252c3261a2ac54b0a062b6ab44cc2e0c63b81b6307b66","schema_version":"1.0","event_id":"sha256:9073f84b914f04023d2252c3261a2ac54b0a062b6ab44cc2e0c63b81b6307b66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/bundle.json","state_url":"https://pith.science/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/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":"2026-08-22T23:46:03Z","links":{"resolver":"https://pith.science/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7","bundle":"https://pith.science/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/bundle.json","state":"https://pith.science/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BB2PKZTRHJPXSKR2SFWRLKLQY7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:BB2PKZTRHJPXSKR2SFWRLKLQY7","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":"9f6e7097c265c8cc95d3459adc2c8108c045d2e5a97d937ef3e7dcd48f051eea","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-18T15:15:45Z","title_canon_sha256":"45f38e4087f65e2de48b2cfc73e6e9877e082928d00dd4d2374f1cd0351a1a7b"},"schema_version":"1.0","source":{"id":"2203.10007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.10007","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"arxiv_version","alias_value":"2203.10007v1","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.10007","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_12","alias_value":"BB2PKZTRHJPX","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_16","alias_value":"BB2PKZTRHJPXSKR2","created_at":"2026-07-05T04:06:26Z"},{"alias_kind":"pith_short_8","alias_value":"BB2PKZTR","created_at":"2026-07-05T04:06:26Z"}],"graph_snapshots":[{"event_id":"sha256:9073f84b914f04023d2252c3261a2ac54b0a062b6ab44cc2e0c63b81b6307b66","target":"graph","created_at":"2026-07-05T04:06:26Z","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/2203.10007/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"OB associations are low-density groups of young stars that are dispersing from their birth environment into the Galactic field. They are important for understanding the star formation process, early stellar evolution, the properties and distribution of young stars and the processes by which young stellar groups disperse. Recent observations, particularly from Gaia, have shown that associations are highly complex, with a high degree of spatial, kinematic and temporal substructure. The kinematics of associations have shown them to be globally unbound and expanding, with the majority of recent st","authors_text":"Eleonora Zari (Max-Planck Institut fur Astronomie), Marina Kounkel (Vanderbilt University), Nicholas J. Wright (Keele University), Robin D. Jeffries (Keele University), Simon Goodwin (University of Sheffield)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-18T15:15:45Z","title":"OB Associations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.10007","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":"sha256:08855bc5c9780fb8c1a8d7ea153cc819423004afdf0c58006fad99bdb98de48c","target":"record","created_at":"2026-07-05T04:06:26Z","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":"9f6e7097c265c8cc95d3459adc2c8108c045d2e5a97d937ef3e7dcd48f051eea","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-18T15:15:45Z","title_canon_sha256":"45f38e4087f65e2de48b2cfc73e6e9877e082928d00dd4d2374f1cd0351a1a7b"},"schema_version":"1.0","source":{"id":"2203.10007","kind":"arxiv","version":1}},"canonical_sha256":"0874f566713a5f792a3a916d15a970c7f6e9c1d5e72caff3a5c0c063b12ecc11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0874f566713a5f792a3a916d15a970c7f6e9c1d5e72caff3a5c0c063b12ecc11","first_computed_at":"2026-07-05T04:06:26.745217Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:06:26.745217Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OML8lcYrRKGEQ3wahlxewXTpQ8CaLOOnP9oriefDOp9RtqOkp3YxR7mp61MayYyiVcCWLuDepcH4U6kbCy+TDA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:06:26.745788Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.10007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08855bc5c9780fb8c1a8d7ea153cc819423004afdf0c58006fad99bdb98de48c","sha256:9073f84b914f04023d2252c3261a2ac54b0a062b6ab44cc2e0c63b81b6307b66"],"state_sha256":"e7517dfbbe68604042c0a444104ae847b5ec86042beb6e014bb6d3e9bfe55093"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VCjtZUZG/SaYHaf8h2va3CiUdBvoyq1B3BkUM+MukiYCquxzOqkKh+VLe3WlrH+rofw7B1ckDwu33a0/V5ZSBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T23:46:03.564092Z","bundle_sha256":"07afe94dd0c34e5bab716896ea14fd019868d97d1c78f951f6345b2d64a6d0d4"}}