{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:G5AQYEL44BDF2Q2QAS3A3UYO4P","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":"82aff206e602c53147134a049b82799f8ddb872d21e32a6c4980bb867c53ae78","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-01-10T13:34:11Z","title_canon_sha256":"3ccc16a9b8a45f7e12b79196a6ec1e447ce777078d72ea0b8e8e512405ba4c34"},"schema_version":"1.0","source":{"id":"2301.03959","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2301.03959","created_at":"2026-07-05T05:39:30Z"},{"alias_kind":"arxiv_version","alias_value":"2301.03959v1","created_at":"2026-07-05T05:39:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.03959","created_at":"2026-07-05T05:39:30Z"},{"alias_kind":"pith_short_12","alias_value":"G5AQYEL44BDF","created_at":"2026-07-05T05:39:30Z"},{"alias_kind":"pith_short_16","alias_value":"G5AQYEL44BDF2Q2Q","created_at":"2026-07-05T05:39:30Z"},{"alias_kind":"pith_short_8","alias_value":"G5AQYEL4","created_at":"2026-07-05T05:39:30Z"}],"graph_snapshots":[{"event_id":"sha256:15f7fcd424af9f1e7d8ec0f493dcfa04ca2f2d72f7e5a63edab12542487c8830","target":"graph","created_at":"2026-07-05T05:39:30Z","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/2301.03959/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"About half of white dwarfs (WDs) evolve to the DC state as they cool; the others become DQ or (temporarily?) DZ WDs. The recent magnetic survey of the local 20 pc volume has established a high frequency of magnetic fields among WDs older than 2-3 Gyr, demonstrating that in low- and average-mass WDs, the effects of magnetism become more common as they age, and the fields on average become stronger. However, the available statistics of WDs older than about 5 Gyr do not clearly establish how fields evolve beyond this age. We are carrying out a survey to clarify the occurrence of magnetism in DC-t","authors_text":"Andrei V. Berdyugin, John D. Landstreet, Stefano Bagnulo, Svetlana V. Berdyugina, Vilppu Piirola","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-01-10T13:34:11Z","title":"Discovery of magnetic fields in five DC white dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.03959","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:c86dbf043c6198289a8bdf93030906244425809d7d56f1c1ec27e9db12f6350f","target":"record","created_at":"2026-07-05T05:39:30Z","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":"82aff206e602c53147134a049b82799f8ddb872d21e32a6c4980bb867c53ae78","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-01-10T13:34:11Z","title_canon_sha256":"3ccc16a9b8a45f7e12b79196a6ec1e447ce777078d72ea0b8e8e512405ba4c34"},"schema_version":"1.0","source":{"id":"2301.03959","kind":"arxiv","version":1}},"canonical_sha256":"37410c117ce0465d435004b60dd30ee3e7f3a720337e96405a2d6d956eff6a99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"37410c117ce0465d435004b60dd30ee3e7f3a720337e96405a2d6d956eff6a99","first_computed_at":"2026-07-05T05:39:30.202462Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:39:30.202462Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sT89BXOHNN+Wm3b3LUErXxjnV/PJxlNxmUZYaaOWAI6JmBmiSAIw0NjfIrj1SkRRtzc09ajO9Ey+ve0/mCwYAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:39:30.203008Z","signed_message":"canonical_sha256_bytes"},"source_id":"2301.03959","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c86dbf043c6198289a8bdf93030906244425809d7d56f1c1ec27e9db12f6350f","sha256:15f7fcd424af9f1e7d8ec0f493dcfa04ca2f2d72f7e5a63edab12542487c8830"],"state_sha256":"a70d0fffacc5a6973a2848a1bef641dfb851de34de41b74de817c23ade6862c9"}