{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:BQX3633HELQD4SOAJIJDFT3W5K","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":"1145aa5f300cb93e96dae09c201817840ce3ffe1b6ba2b3f45f3cea18e093364","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-10-19T00:23:26Z","title_canon_sha256":"b9ce3d66a7b1814b32df3547ab550f3d266f964c28c178f77656d9bfee47648e"},"schema_version":"1.0","source":{"id":"2110.09668","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.09668","created_at":"2026-07-05T04:10:37Z"},{"alias_kind":"arxiv_version","alias_value":"2110.09668v2","created_at":"2026-07-05T04:10:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.09668","created_at":"2026-07-05T04:10:37Z"},{"alias_kind":"pith_short_12","alias_value":"BQX3633HELQD","created_at":"2026-07-05T04:10:37Z"},{"alias_kind":"pith_short_16","alias_value":"BQX3633HELQD4SOA","created_at":"2026-07-05T04:10:37Z"},{"alias_kind":"pith_short_8","alias_value":"BQX3633H","created_at":"2026-07-05T04:10:37Z"}],"graph_snapshots":[{"event_id":"sha256:029684f44485cd09bedf09bc2ffaa150793fed7957ae12272ea05ab0355c1207","target":"graph","created_at":"2026-07-05T04:10:37Z","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/2110.09668/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We searched through the entire Gaia EDR3 candidate white dwarf catalogue for stars with proper motions and positions that are consistent with the stars having escaped from the Alpha Persei cluster within the past 81~Myr, the age of the cluster. In this search we found five candidate white dwarf escapees from Alpha Persei and obtained spectra for all five. We confirm that three are massive white dwarfs sufficiently young to have originated in the cluster. All three are more massive than any white dwarf previously associated with a cluster using Gaia astrometry, and possess some of the most mass","authors_text":"David R. Miller, Harvey Richer, Ilaria Caiazzo, Jeremy Heyl","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-10-19T00:23:26Z","title":"The Ultramassive White Dwarfs of the Alpha Persei Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.09668","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":"sha256:81a415b9cdbac539fa21eac9fed376fb51ee8bc9808bda6c50fe98d689ea5df5","target":"record","created_at":"2026-07-05T04:10:37Z","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":"1145aa5f300cb93e96dae09c201817840ce3ffe1b6ba2b3f45f3cea18e093364","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-10-19T00:23:26Z","title_canon_sha256":"b9ce3d66a7b1814b32df3547ab550f3d266f964c28c178f77656d9bfee47648e"},"schema_version":"1.0","source":{"id":"2110.09668","kind":"arxiv","version":2}},"canonical_sha256":"0c2fbf6f6722e03e49c04a1232cf76eab595a42838b221d32005df4dbb81d960","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c2fbf6f6722e03e49c04a1232cf76eab595a42838b221d32005df4dbb81d960","first_computed_at":"2026-07-05T04:10:37.827894Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:10:37.827894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Uf57k2CRxYcytCfGzcXCovu+4J8zZjNSEdB75VQ1yQq7niIirU1QtxPHdafEVBmJhfM74quk+Sr4hPngKbL7Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:10:37.828325Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.09668","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81a415b9cdbac539fa21eac9fed376fb51ee8bc9808bda6c50fe98d689ea5df5","sha256:029684f44485cd09bedf09bc2ffaa150793fed7957ae12272ea05ab0355c1207"],"state_sha256":"bddbcedcb1216fc21d847027da97fd8434970519ddf5c23501ae3c0b9a01532d"}