{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:PR4OA2XPW4H7YKOJCUK4MRFKMS","short_pith_number":"pith:PR4OA2XP","canonical_record":{"source":{"id":"1501.07197","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-28T17:03:56Z","cross_cats_sorted":[],"title_canon_sha256":"556ba661288450cc93f7e7e515a573e7aaf7e5158524264ec947ac45aaba212a","abstract_canon_sha256":"caf2838df50d778c009a6e22d450ae590238712d0a9427c42be0d2374c6d4359"},"schema_version":"1.0"},"canonical_sha256":"7c78e06aefb70ffc29c91515c644aa649d9e964ecbfa73099b0cc88d04fb3a62","source":{"kind":"arxiv","id":"1501.07197","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07197","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07197v3","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07197","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"pith_short_12","alias_value":"PR4OA2XPW4H7","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PR4OA2XPW4H7YKOJ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PR4OA2XP","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:PR4OA2XPW4H7YKOJCUK4MRFKMS","target":"record","payload":{"canonical_record":{"source":{"id":"1501.07197","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-28T17:03:56Z","cross_cats_sorted":[],"title_canon_sha256":"556ba661288450cc93f7e7e515a573e7aaf7e5158524264ec947ac45aaba212a","abstract_canon_sha256":"caf2838df50d778c009a6e22d450ae590238712d0a9427c42be0d2374c6d4359"},"schema_version":"1.0"},"canonical_sha256":"7c78e06aefb70ffc29c91515c644aa649d9e964ecbfa73099b0cc88d04fb3a62","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:11.422801Z","signature_b64":"fonCRvRNrtEpy0mQ64u/po+YkH1zFqY4Wjg75LuK7d0RK+x6KjLkFL8RU3gzd3t1yFsAXzPrZtG3lpbIth2eAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c78e06aefb70ffc29c91515c644aa649d9e964ecbfa73099b0cc88d04fb3a62","last_reissued_at":"2026-05-18T01:35:11.422063Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:11.422063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.07197","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:35:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EYh1Eb9FPDeeVMnwg/9C0XeKRN65iYWIEIKMAoAFhGsJihgdAkAibQ8IC3AFXVgMaiajVgZ+xQ1YWU/8lg0aDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:06:16.573943Z"},"content_sha256":"7591d5ec2e79025d4026bd6253de3e58125bdb2302447f22905b6edc5e23e8ca","schema_version":"1.0","event_id":"sha256:7591d5ec2e79025d4026bd6253de3e58125bdb2302447f22905b6edc5e23e8ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:PR4OA2XPW4H7YKOJCUK4MRFKMS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin and Magnetism of White Dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Christopher Thompson (CITA), Yevgeni Kissin (University of Toronto)","submitted_at":"2015-01-28T17:03:56Z","abstract_excerpt":"The magnetism and rotation of white dwarf (WD) stars are investigated in relation to a hydromagnetic dynamo operating in the progenitor during shell burning phases. The downward pumping of angular momentum in the convective envelope, in combination with the absorption of a planet or tidal spin-up from a binary companion, can trigger strong dynamo action near the core-envelope boundary. Several arguments point to the outer core as the source for a magnetic field in the WD remnant: the outer third of a $\\sim 0.55\\,M_\\odot$ WD is processed during the shell burning phase(s) of the progenitor; the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07197","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T01:35:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B6SKiIZr9DnEqFTnwGClbyYBfYhdJUFTWDX/OJr3pYcjZLSraF3cGvuhYDWFLzqjsIbQF/gNrbJyEumKdKeoAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:06:16.574283Z"},"content_sha256":"224912b6eef3d3bbd76a8226dc1cd28172e79a731ff0154d3b6f75b00c713dec","schema_version":"1.0","event_id":"sha256:224912b6eef3d3bbd76a8226dc1cd28172e79a731ff0154d3b6f75b00c713dec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/bundle.json","state_url":"https://pith.science/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/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":"2026-07-04T23:06:16Z","links":{"resolver":"https://pith.science/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS","bundle":"https://pith.science/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/bundle.json","state":"https://pith.science/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PR4OA2XPW4H7YKOJCUK4MRFKMS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PR4OA2XPW4H7YKOJCUK4MRFKMS","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":"caf2838df50d778c009a6e22d450ae590238712d0a9427c42be0d2374c6d4359","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-28T17:03:56Z","title_canon_sha256":"556ba661288450cc93f7e7e515a573e7aaf7e5158524264ec947ac45aaba212a"},"schema_version":"1.0","source":{"id":"1501.07197","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07197","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07197v3","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07197","created_at":"2026-05-18T01:35:11Z"},{"alias_kind":"pith_short_12","alias_value":"PR4OA2XPW4H7","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PR4OA2XPW4H7YKOJ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PR4OA2XP","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:224912b6eef3d3bbd76a8226dc1cd28172e79a731ff0154d3b6f75b00c713dec","target":"graph","created_at":"2026-05-18T01:35:11Z","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":"The magnetism and rotation of white dwarf (WD) stars are investigated in relation to a hydromagnetic dynamo operating in the progenitor during shell burning phases. The downward pumping of angular momentum in the convective envelope, in combination with the absorption of a planet or tidal spin-up from a binary companion, can trigger strong dynamo action near the core-envelope boundary. Several arguments point to the outer core as the source for a magnetic field in the WD remnant: the outer third of a $\\sim 0.55\\,M_\\odot$ WD is processed during the shell burning phase(s) of the progenitor; the ","authors_text":"Christopher Thompson (CITA), Yevgeni Kissin (University of Toronto)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-28T17:03:56Z","title":"Spin and Magnetism of White Dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07197","kind":"arxiv","version":3},"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":"sha256:7591d5ec2e79025d4026bd6253de3e58125bdb2302447f22905b6edc5e23e8ca","target":"record","created_at":"2026-05-18T01:35:11Z","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":"caf2838df50d778c009a6e22d450ae590238712d0a9427c42be0d2374c6d4359","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-28T17:03:56Z","title_canon_sha256":"556ba661288450cc93f7e7e515a573e7aaf7e5158524264ec947ac45aaba212a"},"schema_version":"1.0","source":{"id":"1501.07197","kind":"arxiv","version":3}},"canonical_sha256":"7c78e06aefb70ffc29c91515c644aa649d9e964ecbfa73099b0cc88d04fb3a62","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c78e06aefb70ffc29c91515c644aa649d9e964ecbfa73099b0cc88d04fb3a62","first_computed_at":"2026-05-18T01:35:11.422063Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:11.422063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fonCRvRNrtEpy0mQ64u/po+YkH1zFqY4Wjg75LuK7d0RK+x6KjLkFL8RU3gzd3t1yFsAXzPrZtG3lpbIth2eAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:11.422801Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.07197","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7591d5ec2e79025d4026bd6253de3e58125bdb2302447f22905b6edc5e23e8ca","sha256:224912b6eef3d3bbd76a8226dc1cd28172e79a731ff0154d3b6f75b00c713dec"],"state_sha256":"acc36a03edaecc12eedec4a0e4d29baea3168c1bbdb87e7aed70d0f00c8b214d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sL7XHcyEn1X6GNetM9bjTZq3lWM1BTekWHZyNMUU3sEmpKOPsM5Se+IkBsAyXQuFSGAtohPs45mnzb0LpnwWDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T23:06:16.576253Z","bundle_sha256":"c4c4c237a6b100c070c61c330a6085ada6cc8c7b7fbb2c681d223846a33fcf90"}}